need a faster commuter

L

leo99

100 W
Joined
May 22, 2014
Messages
124
Location
lausanne, VD, switzerland
Hi everybody,
I have been lurking around this forum for a year now and i did finally end up getting myself a bike this summer it's a hardtail scott to wich i put a bbs02 with a 14s 14ah pack from em3ev. Its been working great but i would like to make someting faster the bike is great for 20mph (30kmh) but i would like a bike to cruise at around 28mph (40kmh). I almost only ride on the road .I am going to sell my bike to fund the next one.I would like to go with a full suspension with good brakes. So i need 30-35mph ( 50kmh ) ebike that can do some hills for 15-20miles. I was either going to go with LR mid drive or a big DD hub such as mxus3000 or hs3548. I don't know much about DD hubs.
I would to hear your ideas

ps: i live in switzerland
 
I think the reason you have not got many replies is that this question gets asked so many times that a bit of reading the forum would easily answer your questions.

The short answer, is that for 35mph top speed, 20 miles with high twenties average speed and hills involved you'll need a big DD rear hub like the ones you mention and a really big battery.

Use the simulator to find out how big you need:

http://www.ebikes.ca/tools/simulator.html
 
A 3540 or equivalent 1000W motor will do what you want on 20ah 14s lipo. The MXUS 3000 on 20s lipo would be a nice overkill though, as would any of the 40-45mm wide motors.
 
it's about the battery before buying a motor you must get a good match. You want 40amp or more. So a battery that can support 60-80 amp. more the better 100 amp battery for 40-60 amp for ezz on the battery so not at it limit for long life.
 
I use a Mac 8T together with 12S of Turnigy Multistars that exceeds his requirements.

However, I don't have the long hills of Switzerland, so I don't know if the Mac 8T will build heat on those hills. Since even the longest, steepest hill here doesn't warm the Mac, I doubt even Swiss hills would kill it, provided the rider exercises some caution. (Checking temps the first couple rides, pedaling the hills, etc).
 
If you overkill the motor some, it doesn't mean you have to overkill the power you feed it. The wide magnet in a bigger motor will pull nice and efficient, and feel great with half the rated watts.

I just rode some bikes that use the muxus 3000w, that were being fed about 1700w of 48v. They ran nice and perky, and reached 30 mph with ease.

Not sure exactly what winding of the motor was used. But my point is, 72v is not really needed. nor 3000w. Any decent hubmotor fed 1500-2000w should do you fine.

You worry about local cops and laws. None of anybody elses business. But do be aware that the faster you go, the more looks like this you get. :shock: No ebike going 30 mph looks like a "bike". Especially if you are going fast up hill. At 40 mph, you stick out like a hooligan, even if you ride polite.

Anyway, you be the judge of the risk of police giving a shit. You know the local cops, and the route. We don't.
 
I'm surprised you are getting that level of performance. I have 3 BBS02, (500W/20A and 750W/22 A versions) and they all easily cruize at above 40 Kph my max is often 48 kph. Have you tried changing the max speed? By holding the + and - button together for 5 secs to get into the advanced menu? You could also reprogram the controller but that takes a special cable. Search the forum for more details.
Bottom line - I would look into making sure you are getting everything from that motor before getting a new setup!
 
Hi everbody,
thanks for all your comments.

Samrich: I have my bbs02 limited to 50 kmh. i love it for 30kmh but when i try to do more it heats up fast, i wouldn't consider going wot with it since i feel it wouldn't handle it for more than a few minutes.

i think i am going to head my self to a mac 10t on 14s with a 12fet controller. I'll either head for em3ev battery with 20r or 25r batterie so to have all of the amps needed or more. Or i ll go with somebody who welds batterys in europe ( he sells his services on endless spheres with sony konion v3 packs. all at 14s and 12-16ah to have some range. I could go with a big DD but at 1500-2000 watts i believe that they are both a good choice but DD is a bit big and less stelthy. I won't go for cheap bike, most likely a used DH bike.
i know the bbs02 gives me almost all i want but i do find the project of doing an ebike almost as fun a riding it. since i am still a student i have to sell whati wont need otherwise i would have keep it.
 
The mac will do your 28 mph, when the battery is full. But it's not going to be like a 35 mph bike.

However, it will be a lot more stealthy than any big muxus. And likely, the Mac will make you happy enough. If not, your existing controller and a good battery could still run a larger DD motor later.
 
leo99 said:
Should i better go with a 8t mac then if i want to it 30mph ? I just don't want to kill the motor uphill :?
Click to expand...
There's been a big discussion going on between the more technically inclined about motor turns, torque and power. The long shot of it, in my opinion, is that the more copper in the wires (by mass), the more power your motor will have, regardless of the diameter of the wire and how many turns are incorporated. Torque is a different thing to grasp. So, a MAC 8T or 10T - won't matter much, take your pick. That said, the MAC's are geared and for their size, provide a torquey punch to those hills. Only way to get more is to go to a bigger motor, hence more copper in the wires, hence more power. MAC 8T is a good choice.
 
Thanks arkmundi i had read the discussion about torque and overheating depending not about the turns.
I see you just got a mac 10t would you have preferred a 8t in the end ? or is 10t plenty enough for speed ?
 
All this talk about top speed, but no mention of hills? Steep hills require even more power to climb with a DD motor this means the right wind and controller setup for the terrain.
 
leo99 said:
Thanks arkmundi i had read the discussion about torque and overheating depending not about the turns.
I see you just got a mac 10t would you have preferred a 8t in the end ? or is 10t plenty enough for speed ?
Click to expand...
I'm happy with my 10T, and not having been on an 8T would not know the actual difference. Just posting that the argument was won and that, theoretically speaking, I expect little difference between the two. Paul at EM3ev says you'll have more torque in the 10T, but all that may well be some marketing hype, giving the buyer more choice - I went with the 10T regardless, because, well, you do have to make that choice. It would be interesting if you would ask him for actual measured torque among the options, in Nm. If you get a reply, please post.
wineboyrider said:
All this talk about top speed, but no mention of hills? Steep hills require even more power to climb with a DD motor this means the right wind and controller setup for the terrain.
Click to expand...
The MAC is not a DD - its geared and designed to deliver torque to the wheel. Ultimately, its the amps through the wires that are going to matter. Since the MAC's are capable of 1500 watts, the choice of battery & controller are going to matter, a lot. I went with better rated 12fet 4110 controller, so as to deliver the maximum watts from my A123 AMP20 48V battery (nominal, 54V actual). Had to promise Paul I'd not exceed that battery size or would have voided the warranty.
 
When you play with ebike.ca simulator with the 40amps on the bmc torque (10t) vs bmc speed (8t)you do see that there is a difference of 30newton meter at 0mph for the 10t and at 25mph 8t has 15newton meter more. You can see that the 10t is more torque at start but at speed 8t has more torque
 
arkmundi said:
leo99 said:
Thanks arkmundi i had read the discussion about torque and overheating depending not about the turns.
I see you just got a mac 10t would you have preferred a 8t in the end ? or is 10t plenty enough for speed ?
Click to expand...
I'm happy with my 10T, and not having been on an 8T would not know the actual difference. Just posting that the argument was won and that, theoretically speaking, I expect little difference between the two. Paul at EM3ev says you'll have more torque in the 10T, but all that may well be some marketing hype, giving the buyer more choice - I went with the 10T regardless, because, well, you do have to make that choice. It would be interesting if you would ask him for actual measured torque among the options, in Nm. If you get a reply, please post.
wineboyrider said:
All this talk about top speed, but no mention of hills? Steep hills require even more power to climb with a DD motor this means the right wind and controller setup for the terrain.
Click to expand...
The MAC is not a DD - its geared and designed to deliver torque to the wheel. Ultimately, its the amps through the wires that are going to matter. Since the MAC's are capable of 1500 watts, the choice of battery & controller are going to matter, a lot. I went with better rated 12fet 4110 controller, so as to deliver the maximum watts from my A123 AMP20 48V battery (nominal, 54V actual). Had to promise Paul I'd not exceed that battery size or would have voided the warranty.
Click to expand...

That's too bad about the heating issue. I guess I'm not demanding as you. :)

I just bought a new 1500 W 35 mm DD drive and so far it's a great motor.
It claims up to 90% efficiency:
http://www.leafbike.com/u_file/images/15_01_05/0a32577ead.jpg

Maybe a decent compromise between speed (faster than MAC) and weight (Less than MXUS 3000) - also the price is less than MAC and MXUS 3000.

With an 18 FET sine wave controller this thing has lots of power 30- 35 mph (50-55 kph) no problem.
Check out this thread:
http://endless-sphere.com/forums/viewtopic.php?f=3&t=65743

I bought mine at http://www.hallomotor.com/2015-new-styl ... ebike.html
or
http://www.ebay.com/itm/2015-New-Style-Black-48V-1500W-Brushless-Gearless-Hub-Motor-for-Rear-Wheel-Ebike-/171560528671?pt=Cycling_Parts_Accessories&hash=item27f1cdeb1f
 
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