Stealth FUTR owners builds and pics

Hyena said:
Re: rebuilding freewheels, unlike splined cassette types the thread on ones have a few steps i the body where the different cogs slip on, so you can't create a mega-range type 3 speed - which would otherwise be excellent!
Depends on the FW; most of the ones I've disassembled have just hte lockring/smallest cog, then all the rest just slip right on over a single-diametered body.

IIRC only one (campagnolio? cant' remember--was a brand I rarely see in scrapped bikes) had two different sizes on it, and I think that one actually had two lockrings/threaded-on cogs,for the two smallest ones, and those were two different diameters.

I'm sure there's a fair number out there like that, though, but there are also plenty that use only one diameter other than the lockring cog. (some also use the same diameter for the locrking cog but since it is threaded you'd have ot grind away the threads and add some form of keying to hold it in place, so that one doesnt' matter)
 
Rix said:
mega-range type 3 speed - which would otherwise be excellent!

Yah, running a 11t, 22t, and a 34T would be an excellent with a 50T+ up front.
I should find out today if I have chain line issues once I get a tire on there. Hopefully it won't be too bad, if it's going to limit the gear range that much then I might have to try something more like your setup. I like the fact that the dnp has an 11 tooth sprocket so it will likely be staying on there. A new crankset with 36/54 similar to yours would be the option to try next.

Yah I am curious as well, look forward to your findings.

It seems to have worked out ok there's actually enough clearance to use the small front with the large rear. Up front an old road bike crankset 40/52. This is the first time I have used a dnp freewheel it seems a bit incompatible with the chain I have on there and grinds a bit. The chain is a cheap sunrace 8spd which is most likely the cause of the grinding.
Oh and it's so nice to have straight rear wheel again, I'll see how long it stays that way :lol:
 

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Rix said:
Thats looks good Ian, seems like you got enough clearance...So, when will it be up and running?

Thanks Rix maybe not as pretty as Keplers work but these are all parts I had left over from other bikes.
I just need to get a new chain and sort out a chain guide which I'm going to sort of copy from Kepler, and then it's ready for the dirt :mrgreen:
 
I think the DNP 7 speed is the same spacing as a shimano 9 speed so maybe check the ratio on your shifter as that may be the issue.

As I now have a 10 speed clutched sram gx 2.1 rd with the dnp 7 speed I am going to fit a friction shifter rather than my current indexed one to be able to get the right alignment on the rear. I've got two coming - a cheapy sunrace as its quick delivery and longer term an ultegra bar end and a paul thumbie.

I did also have to take a little off the edge off one of the teeth of the 2nd smallest cog on my DNP as it was a little bit proud and causing a notching as the chain went over it.
 
Tats said:
I think the DNP 7 speed is the same spacing as a shimano 9 speed so maybe check the ratio on your shifter as that may be the issue.

As I now have a 10 speed clutched sram gx 2.1 rd with the dnp 7 speed I am going to fit a friction shifter rather than my current indexed one to be able to get the right alignment on the rear. I've got two coming - a cheapy sunrace as its quick delivery and longer term an ultegra bar end and a paul thumbie.

I did also have to take a little off the edge off one of the teeth of the 2nd smallest cog on my DNP as it was a little bit proud and causing a notching as the chain went over it.
Hey Tats, I think it's probably because I'm using a chain that has done a fair bit of work on my old gng kit which was really hard on chains so probably quite worn. The indexing of the alivio shifter and derailleur seems to work ok with the 7sp dnp.
 
spektrolyte said:
Are there any FUTR owners here in the United Kingdom?


...and has anyone done a mid-drive on a Beta?
Rod in Perth (Rodney64) installed a Cyclone on a Beta. https://endless-sphere.com/forums/viewtopic.php?f=6&t=71666&start=1400#p1265057
haven't heard how well it's running.
 
PRW said:
Rod in Perth (Rodney64) installed a Cyclone on a Beta. https://endless-sphere.com/forums/viewtopic.php?f=6&t=71666&start=1400#p1265057
haven't heard how well it's running.

Thanks, that's what I'm looking for. I assume Kepler is doing the same on his 29er as it appears to have no hub motor, although the wheels could just be a mockup for scale purposes.

I have a bit of a problem putting a 10kg rear wheel on any bike as it's going to be very difficult to control rear wheel slides with that amount of unsprung weight.

Can any skilled MTB riders put my mind at rest by giving a thumbs up to the handling on a FUTR bike?
 
that was just a mockup picture you saw - Kepler has a Mxus on his.
Rix rates the handling highly on his - and he has a dirt bike background.
 
PRW said:
that was just a mockup picture you saw - Kepler has a Mxus on his.
Rix rates the handling highly on his - and he has a dirt bike background.

The handling on his mid or hub drive build?

The head angle looks great, top tube length is a little short for me tho.
 
You don't have to use the heavier hubs either.

On my Fighter (which is similar to the Beta) I use a 7.2KG Leaf motor. I definitely notice the lower weight compared to it's previous 8.5KG+ HS4080 motor.
Just use some FF + Hubsinks and you can still push multi KW through it without over heating most of the time.

Cheers
 
Can any skilled MTB riders put my mind at rest by giving a thumbs up to the handling on a FUTR bike?

The FUTR, and I have the Alpha and Beta, both handle great. For a MTB rider, If I had to make an analogy on frame geometry and characteristics, I would say both bikes handle somewhere along the lines of an Enduro or Freeride MTB......if properly set up with correct shock length to fork ratio. They do turn quicker and handle just slightly quicker than a full on Down Hill Mountain bike set up, do to a slightly less slack head angle. All this said, the traits can be manipulated with by using a shorter or longer "eye to eye" shock length. It sounds like you haven't built one up yet, tell me how you want your build to handle, and I will make a suggestion on shock length and fork combo for you.
 
Concentric bottom bracket on the beta makes handling quite good.


Sent from my iPhone using Tapatalk
 
Rix said:
The FUTR, and I have the Alpha and Beta, both handle great. For a MTB rider, If I had to make an analogy on frame geometry and characteristics, I would say both bikes handle somewhere along the lines of an Enduro or Freeride MTB...

Thats awesome. If it has the same sort of feel as my Canyon Strive enduro race MTB I would be happy. Still can't get my head around how having such a heavy rear hub doesn't make it a pig to ride, but having not ridden an EEB it's just speculation.

I have found a couple of gents within driving distance of me who have Raptors so that's going to be a good place to start, and there is a Beta frame available here in Europe so the project looks like a starter.
 
Hey Spektrolyte, the handling is pretty damn good. I too had concerns about a heavy hub, but after riding 9lives in canberra i knew i had to have it! (more power). I was very suprised at how well it handled bumps and gnarly terrain at higher speeds.

I have a DRZ400 and have ridden offroad bikes all my life, Im an ok mountain biker and ok offroad rider, but not a racer by any means. I am sure you will be happy with a hub. I certainly am. It is a different riding style, and you do have to change up your rythem for whoops, bumps, and jumps. A favourite of mine is to leave the rear wheel on the ground and do mini monos over jumps, lumps etc. but you can jump them for sure. I'd say see if you can take one for a test drive.

My friend today had a ride of mine....and flipped.... lucky no damage.

I have a video coming soon about fork angle too, as mine was originally too slack. This helped handling nicely.

[youtube]NN9QG1T0CuU[/youtube]
 
OK some good comments here, however I'm not particularly happy with the design of the Beta, seems some important things have been overlooked.

1. Head tube diameter is way too small for 2017, it needs to be a tapered setup as they were introduced for more strength on MTBs and this thing will put way more strain on the head tube than an MTB with all that weight.

2. The whole back end hinges on two small clamps and 4 hex bolts with threads exposed to the elements. These bolts will either seize or shear off at some point unless the thing is regularly greased and tightened. These clamps need to be wider with at least 4 bolts per side, preferably with a flange that covers the outside of the bearing.

3. The bearings are also exposed to the elements and look like they are pressed on. They WILL fail at some point because all of the vertical and lateral strain from the heavy rear end is going through those bearings, how easy is it going to be to replace them?

4. It has a 140mm rotor mount meaning a lightweight alloy adapter and more small hex bolts to get the large rotor that EVERYONE is using. Slowing down from 60 mph using the rear brake is going to create a lot of stress on a small alloy rotor adaptor frame, and there are 4 bolts to keep tight, instead of the 2 had the mount been the correct size to begin with.

5. It does not have a replaceable rear mech hanger which is bonkers, should that delicate and exposed part of the bike take a hit and screw the hanger then a new swingarm is needed.

6. 135mm axles are years out of date. People are having to custom order motors to fit this small axle and there is very little available that will currently fit with almost zero scope for future upgrades. This is a BIG issue.

7. The cut steel warps so easily as others have pointed out, does this mean that water is going to get into the battery compartment as the side panels won't fit flush?

Can anyone comment on these points? I am struggling to find the motivation to pay $1300 for this, and with the mention of a V2 frame it is very tempting to shelve the project and wait for that to become available.
 
Lash said:
A favourite of mine is to leave the rear wheel on the ground and do mini monos over jumps, lumps etc.
Yep that's my staple move too - sometimes involuntarily!


My friend today had a ride of mine....and flipped.... lucky no damage.
Damn it fish! :lol:
I'd be a bit annoyed if someone did that on my bike, but that said I leaned it on a tree today to take a photo, and it fell over and put a massive dent in the carbon insert side. Doh!


1. Head tube diameter is way too small for 2017, it needs to be a tapered setup as they were introduced for more strength on MTBs and this thing will put way more strain on the head tube than an MTB with all that weight.
Yeah it'd be nice, but mtbs have used 1 1/8th steerers for a millennia. As modern mtbs use ever thinner and thinner alumimum it may be a necessity but in steel they're pretty strong. The stealth bombers use the same head tubes and also a similar clamping bearing system, brake mount, derailleur mount on the fighter and these are big heavy bikes that have been kicking around for 5+ years now. As for people getting custom axles made for the 135mm spacing, 135mm has been the standard in ebike motors for years. It's really only since people have gone power mad that they are trying to bolt giant motors on to these things. The alpha has wider spacer for big motors, the beta was intended to be a lighter, more modestly powered bike like the new stealth P7 with a geared motor, or a medium sized DD hub motor. It'll take a H40 and multispeed freewheel which makes for a 5-7kw bike with a handful of gears. If that's not what you want then you're missing the point of this bike.

It is overpriced and poorly thought out and I am not buying one.
LOL, good chat.

Instead I'll wait for V2 to come and and see if any of these important points have been addressed.
You'll be waiting a very long time. I hope you have something else to ride in the mean time otherwise the jokes on you
 
Wow, what a smarmy and unpleasant response. I guess I won't get any after sales service either then.

The point is you can't get forks in 1 1/8" straight very easily any more, unless you go for some cheap Chinese crap, and I have been looking at the 1500w motors available and can't find any with a 135 axle spacing apart from the H40s or a custom MXUS - both of which are a bit heavy for my needs. The steel MTB frames coming out since around 2013 have mostly featured tapered steerer tubes and this IS going to be the standard from here on in...

I have plenty of bikes to ride in the meantime, there was no joke but I really don't feel comfortable about sending YOU any money after this reply. I have also been trying to get answers from you via Facebook about the geometry and you haven't bothered to get back to me with any measurements so far.

You mentioned I think back in Feb that there was a V2 coming but you wouldn't publish details until all the V1s had sold. Replying to customers is a great way to sell products but patronising them isn't, and have you ever heard of a stock clearance sale to make room for new products?

I completely get the point of this bike, which is why I have given it so much consideration and analysis and thought of a list of concerns about it's build ability and future upgrade potential. I would consider buying it if there was the chance of an updated swingarm sometime in the future.

I am a sport MTB rider and want to race this thing in the electric class as it will piss all over the Haibike and other similar offerings. As such I'm interested in its handling, weight distribution and general serviceability. Most of the guys on here seem to be engineering geeks rather than hardcore riders. Thats cool, but if you make a product like this you can expect it to attract attention from people who want to push its limits. The last line in your signature says it all - "My bike is writing cheques my body can't cash" - so why not consider some helpful hints from people who have been racing offroad bikes for years?

Finally you replied to my first draft of the above post, before I changed the wording by removing the one line which could be seen as inflammatory.
 
I have often been asked to try and analyze friction between two members to see if it may evolve into something unpleasant enough that it needs moderation. I don't see that here, but...I think this is a teachable moment for everyone. Most of the ebikers I have interacted with from the UK have been very polite, and respond well when they are regarded with politeness. Most of the ebikers from Australia have a vigorous sense of humor, and seem to appreciate a similar response and humor.

I don't think there was any intentional abrasiveness intended by anyone in this thread to anyone else, I just think there may have been some misunderstandings based on cultural style. Of course, I may be wrong. Please continue as you wish.
 
spektrolyte, so you will not take the frame? I have another guy interested in it...so let me know.
In regards to the frame itself, yes it has some cons as well as pros. The main problem is while you can find a frame that is better built, you cannot find a frame that has better geometry, looks and with the same (almost) perfect size. The other frames out there is either very bulky, heavy or not good looking not to say that they don't handle that good due to awkward geometry. This goes for hub motor frames. I am not talking about mid drives now.
So while you wait for that perfect frame a few years (if it ever comes), go for something now so you can start riding. I went this path because there is simply no other choice out there.
 
spektrolyte said:
Wow, what a smarmy and unpleasant response. ...
you replied to my first draft of the above post, before I changed the wording by removing the one line which could be seen as inflammatory.
I saw the original and I replied. I thought it was actually fairly polite given the tone of your post.

I really don't feel comfortable about sending YOU any money after this reply.
At the risk of being accused of not playing nice, it was YOU that came in criticizing pretty much every aspect of the bike's design and then bluntly declared it was overpriced and you wouldn't buy one - that was pretty decisive post before I'd said a word. I apologise if you are genuinely interested, and didnt realise you were the same person who'd messaged me on FB. I thought you were just trolling and looking for a fight. We've had a few of those drop by... I guess you realised afterwards that it perhaps came across more inflammatory than you'd intended?

Anyway you're new here so lets leave it, but for future reference there's no such thing as first drafts - once you write a post and hit submit that's it - it's there for eternity. If someone is online at the same time as you they will just see what you first posted. If someone comes along and reads it later after you've edited it they'll see the updated version but the original is always there for anyone to see if they click back through the history. It's made for some amusing reading over the years when people post drunk :lol:

spektrolyte said:
The point is you can't get forks in 1 1/8" straight very easily any more, unless you go for some cheap Chinese crap
This is the exact reason I had the DNM USD-6s custom made for these frames. Plus you can still run most triple clamp forks that have a straight steerer.

I have been looking at the 1500w motors available and can't find any with a 135 axle spacing apart from the H40s or a custom MXUS - both of which are a bit heavy for my needs
What spacing are they ?? Surely almost every 1500w motor on the market would be 135mm spacing. If you don't want the H40 the H35 will fit, or the leaf equivalents. All of the 9C clones out there are 135mm spacing.

The steel MTB frames coming out since around 2013 have mostly featured tapered steerer tubes and this IS going to be the standard from here on in...
I'd like tapered steerers too, but the factory already has the jigs made and use them for all their other bikes with straight steerers so this is why I said it'll be a very long time before any changes are made. If anything I think there's a chance of a revised swing arm first.

I have also been trying to get answers from you via Facebook about the geometry and you haven't bothered to get back to me with any measurements so far
Sorry I've been away this weekend and I don't have any of that information from the factory. They're not details they provide. All I can tell you in terms of top tube length that in a straight line from the centre of the steerer to the centre of the seat post is 61cm. With a long seat post they'll accommodate a pretty tall rider. How tall are you again Kepler ? 6'2" ? Kepler also posted a good picture comparing the geometry to an XC bike earlier on in this thread if you scroll back.

have you ever heard of a stock clearance sale to make room for new products?
I guess at some stage there'll be a V2 but I dont call the shots on any of this stuff and now that stealth are busy with the new P7 model I suspect they'll be focusing on that for a while. Materials are bought in bulk so ALOT of bikes will have to go before any changes are made. I have zero idea about time lines but if I had to guess I'd say it wouldn't be this year.

I would consider buying it if there was the chance of an updated swingarm sometime in the future
I've been pushing for swing arm revisions since the first batch! As above I dont control this but if I did I'd be making them a little wider and with horizontal pinch dropouts. I dont think the concentric bottom bracket mount will be changed and if there is a V2 swing arm I imagine all else would be kept the same so they're compatible.

I am a sport MTB rider and want to race this thing in the electric class as it will piss all over the Haibike and other similar offerings. As such I'm interested in its handling, weight distribution and general serviceability. Most of the guys on here seem to be engineering geeks rather than hardcore riders. Thats cool, but if you make a product like this you can expect it to attract attention from people who want to push its limits.
For sure the amount of power you could put through this would hose a haibike, but are they not power categories or classes to separate this ? Or is it still early days enough that it's ebikes vs legs and anything goes ? If you're really serious about racing other mtbs like that pretty much any hub motor is going to be a disadvantage. The nearest one I'd recommend would be the new Grin hub motor, but I'm not sure they have a rear version yet. That's the lightest hub motor you can get. Failing that the difference between a "1500w" motor and a stamped stator H40 is trivial and in a race setting with ferrofluid and hub sinks I'd be putting my money on a H40 bursting 7kw odd. But if you're a somewhat serious/skilled mtb racer don't use a hub - use a mid drive. It's not a great ambassador for ebikes but if you're not worried about the noise a cyclone or tangent would give you the best power:weight and you could keep the bike light buy having a small backpack mounted battery.

The last line in your signature says it all - "My bike is writing cheques my body can't cash" - so why not consider some helpful hints from people who have been racing offroad bikes for years?
It's more a joke, poking fun at my own health issues. But everyone sharing hints and tips is what ES is all about!

Allex said:
So while you wait for that perfect frame a few years (if it ever comes), go for something now so you can start riding. I went this path because there is simply no other choice out there.
This is exactly what I meant when I said the joke is on anyone who says they're going to hang out for the perfect ebike. I messed around for years playing with different frame designs, wanting to build my own perfect ebike. Then I got crook and as soon as I was on my feet again bought a stealth fighter, because life is short and even if the perfect ebike is only 2 years away, that's 2 years of riding I've had in the mean time. I'm biased but I reckon the beta is as close to the perfect all rounder as you can get.
 
spinningmagnets said:
I have often been asked to try and analyze friction between two members to see if it may evolve into something unpleasant enough that it needs moderation. I don't see that here, but...I think this is a teachable moment for everyone. Most of the ebikers I have interacted with from the UK have been very polite, and respond well when they are regarded with politeness. Most of the ebikers from Australia have a vigorous sense of humor, and seem to appreciate a similar response and humor.

I don't think there was any intentional abrasiveness intended by anyone in this thread to anyone else, I just think there may have been some misunderstandings based on cultural style. Of course, I may be wrong. Please continue as you wish.

Hey Spinner, reading the situation correctly is why you are a Moderator.
 
spektrolyte said:
You mentioned I think back in Feb that there was a V2 coming but you wouldn't publish details until all the V1s had sold. Replying to customers is a great way to sell products but patronising them isn't, and have you ever heard of a stock clearance sale to make room for new products?

I completely get the point of this bike, which is why I have given it so much consideration and analysis and thought of a list of concerns about it's build ability and future upgrade potential. I would consider buying it if there was the chance of an updated swingarm sometime in the future.

I am a sport MTB rider and want to race this thing in the electric class as it will piss all over the Haibike and other similar offerings. As such I'm interested in its handling, weight distribution and general serviceability. Most of the guys on here seem to be engineering geeks rather than hardcore riders. Thats cool, but if you make a product like this you can expect it to attract attention from people who want to push its limits. The last line in your signature says it all - "My bike is writing cheques my body can't cash" - so why not consider some helpful hints from people who have been racing offroad bikes for years?

Finally you replied to my first draft of the above post, before I changed the wording by removing the one line which could be seen as inflammatory.

Spectro, I get and appreciate your comments, we have some thick skin here on ES so its okay to not agree with folks, and still be friends. Hyena covered everything and then some about what I was going to say, so I wont repeat that. In summary, no one is disagreeing with your comments about the frames potential room for improvement. A tapered head tube would open up alot of options for single crown freeride forks. Not so much for dual crown. A while back I contacted DVO to see if they could custom build their fork with a 1.125" fork tube. not a problem and no extra cost. I think the Beta could use a 150mm wide swingarm like the Alpha. And just so you know, FUTR is aware and we MAY see some of the mods you mentioned in the future. As far as the replacement derailleur hanger goes, its not necessary. The dropout is solid Aircraft grade chromolly steel. I was trying to cut some slits into the drop out so the pinch clamps would pinch the axle better, I barely scratch a mm into the first dropout before the hacksaw blade was completely ruined. I gave up on the endeavor. Here is what I think you need to know. No home built MTB ebike conversion is going to handle as good as the beta does with batteries and motor. The caveat to this is some of the more tech savvy guys here have actually modded and converted the down tubes on MTBs to hold a battery, with great success. Here is a picture of my 2nd ebike build. Frame is a Karpiel Disco Volante, with 24"MTB wheel on the rear and a 26"MTB up front. The forks are Marzocchi units....when they were built in Italy and are still some of the best forks I have ridden, even compared to current standards. This bike handled great, and was more flickable and agile on a tight single track trail than my Fighter and Bomber could be made to do. Also part of this was because my battery was much lighter, and I was running a geared MAC 10 hubmotor on this bike, so being half of the weight of my Bomber contributed to the great handling no doubt. Don't get me wrong, my Fighter and Bomber will smoke this build in a drag race or any terrain that allows high speed. I since have taken this same running gear, with a bigger and better battery, and built up the Beta. The Beta, event though weighing 6 pounds more than the homebuilt Karpiel handles way way better everywhere. The weight gain is from the frame and bigger battery I attribute this to the frame design, head tube to seat tube angle, seat tube to BB relationship. Much better. So here is my suggestion, get the Beta and get your build going. If and when the new frame comes out, you can either sell the Beta and recoup some of your money, or strip it down, build the new bike, and then sell the frame for 50 cents on the dollar, and it will sell.
 

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