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by MadRhino
Dec 28 2011 11:53am
Forum: E-Bike General Discussion
Topic: Tyres And Rated Load Specs
Replies: 5
Views: 401

Re: Tyres And Rated Load Specs

The load that your tires can take is important, but most bicycle tires are not rated. For those that are, the rating is an average and the reality is different with temperature, PSI, and terrain. As a general rule, if you load alot, or ride very fast, chose a bigger tire with thick casing. A wire be...
by MadRhino
Dec 27 2011 4:24am
Forum: E-Bike General Discussion
Topic: new build or buy stealth or a zero
Replies: 19
Views: 1139

Re: new build or buy stealth or a zero

What's KTM adding to the mix? They released very little info. We will know in a few month. My guess is more power and/or less weight, overall better components. Motorcycle manufacturers hitting the EV market, will bring their design expertise. They have volume prices on components, and large manufa...
by MadRhino
Dec 26 2011 8:04pm
Forum: E-Bike General Discussion
Topic: new build or buy stealth or a zero
Replies: 19
Views: 1139

Re: new build or buy stealth or a zero

You can do better than both, Bomber or Zero, but it will cost alot of time, and maybe even more money. For jumping, I'd wait for the new KTM electric motocross, that will be available next spring. Knowing KTM, it must be way better than a Zero. Jumping 3 ft is not much to ask, yet more than reasonab...
by MadRhino
Dec 26 2011 7:36pm
Forum: E-Bike General Discussion
Topic: Bike Suspension Design Help
Replies: 34
Views: 3408

Re: Bike Suspension Design Help

From what I see of it already, you have to design your linkage to fit the longest shocks that are readily available on the DH components market. That would be 9.5 X 3.0, longer than that is possible but expansive, with very limited choice. So, let's say that you use a 9.5 in shock with 3 in travel, ...
by MadRhino
Dec 25 2011 11:33pm
Forum: E-Bike General Discussion
Topic: Swingarm Replacement
Replies: 2
Views: 357

Re: Swingarm Replacement

The best and easier way is to replace the tru axle with steel dropouts. Cut the swingarm tubing, make dropout inserts with steel plate. Make it fit tight, ideally 4 in into the tubing with epoxy, add one screw for safety. Before glueing them, make sure the dropout alignment, derailer hanger and brak...
by MadRhino
Dec 25 2011 1:17pm
Forum: E-Bike General Discussion
Topic: Bike Suspension Design Help
Replies: 34
Views: 3408

Re: Bike Suspension Design Help

This high pivot design was made some 13 years ago. Balfa had some frames with this design, we were talking about it with John last week. This was a 10 in travel that could take big drops, but never been a winner. They made it from steel here in Montreal for a few years, then went for alu without mor...
by MadRhino
Dec 25 2011 12:02pm
Forum: E-Bike General Discussion
Topic: Bike Suspension Design Help
Replies: 34
Views: 3408

Re: Bike Suspension Design Help

Try this software, it is specifically made for designing rear suspension bikes. http://www.bikechecker.com/ Very interesting. For someone who knows the goals to target, this is a good tool to help. If you copy a system, please copy one that proved a winner. Very few frames are successfull DH racers...
by MadRhino
Dec 25 2011 9:04am
Forum: E-Bike General Discussion
Topic: Bike Suspension Design Help
Replies: 34
Views: 3408

Re: Bike Suspension Design Help

... I need a DH worthy rear suspension pivot design that can be made of steel, and built from basic hand tools and a welder. I don't have access to any percision machining equipment. I've come up with a few designs in my head, but most are overly complicated or couldn't be built with the tools I ha...
by MadRhino
Dec 24 2011 9:30am
Forum: E-Bike General Discussion
Topic: Burbany (Vancouver) scooterbikes confusion
Replies: 21
Views: 1703

Re: Burbany (Vancouver) scooterbikes confusion

Here they are not bothered when they ride the street. even when obviously overpowered. On the bike path, they can be perfectly legal and still be harassed. A friend of mine has one and he was fed up with the perception that he had from other users and police on the bike path. I took off the 86 pound...
by MadRhino
Dec 24 2011 3:26am
Forum: E-Bike General Discussion
Topic: Choosing next Build - Full Suspension vs Cargo
Replies: 15
Views: 1165

Re: Choosing next Build - Full Suspension vs Cargo

No cheap option can ride nearly as good as a Pro DH racing bike, and since you have to mod it anyway, the best is buying a used one. Those bikes are all around 5000$ new, but after 2 DH seasons you can find them for 1500 to 2000$. Sometimes you can find a frame alone for cheap. Many amatuer DH rider...
by MadRhino
Dec 24 2011 12:33am
Forum: E-Bike General Discussion
Topic: Choosing next Build - Full Suspension vs Cargo
Replies: 15
Views: 1165

Re: Choosing next Build - Full Suspension vs Cargo

Well, you know how I am into DH bikes, so it won't be a surprise that my recommendation is to go FS, and a good one. I am curious about the build that TomTom did with the 575, for I believe that it is a good lightweight FS frame to build on. I like the Yeti frames, and I would be very happy to build...
by MadRhino
Dec 23 2011 8:35pm
Forum: E-Bike General Discussion
Topic: Workbench / Workshop / Lab Showcase
Replies: 51
Views: 4766

Re: Workbench / Workshop / Lab Showcase

You guys make me think I should have planned the Christmas holliday to clean and organize my garage.
Not this time, GF wants to go skiing, and I don't want to start the new year sex starved in a clean garage. :mrgreen:
by MadRhino
Dec 23 2011 7:46pm
Forum: E-Bike General Discussion
Topic: Pulling A Tyre Directly Onto A Hub Motor, Any Hub Motor.
Replies: 7
Views: 699

Re: Pulling A Tyre Directly Onto A Hub Motor, Any Hub Motor.

The fork lift tire is not a bad idea.
You could drill lateral holes in it, to make it flex.

Like those
by MadRhino
Dec 23 2011 6:36pm
Forum: E-Bike Technical
Topic: The Unofficial 'CroMotor' Owners Tech-Tips Thread
Replies: 487
Views: 88318

Re: The Unofficial 'CroMotor' Owners Tech-Tips Thread

In a race situation, top speed is way behind acceleration, traction, weight, and braking performance. Unless you plan to race a long straight course or long endurance, building to beat the X54 Clyte should not be a problem. Anyway, we will know soon enough, many of us will have built with both motor...
by MadRhino
Dec 23 2011 9:48am
Forum: E-Bike Technical
Topic: *WANTED* technical support 4 design production EU Citybike!
Replies: 68
Views: 9045

Re: *WANTED* technical support 4 design production EU Citybi

On this side of the sea, we typically use more power, because the law let us, and also because overpowered Ebikes are ignored in many places. That makes it natural for us to build with rear hub motor, for a front hub with power is never a good ride. I build with a big rear DD hub, and about the same...
by MadRhino
Dec 22 2011 12:11am
Forum: E-Bike General Discussion
Topic: Extreme range e-bike?
Replies: 174
Views: 14361

Re: Extreme range e-bike?

It is very close to the same as a zero motorcycle which is a system optimized for nearly exactly the stated requirements. A Zero motorcycle has a range of about 20 miles when used hard offroad. I can do the same with my 68 pound Demo 8 build, and it is a much better ride on a DH track. KTM has an E...
by MadRhino
Dec 21 2011 11:29pm
Forum: E-Bike General Discussion
Topic: Extreme range e-bike?
Replies: 174
Views: 14361

Re: Extreme range e-bike?

Ive looked at zero motorcycles but they are far too big & heavy. I'm looking at using a DH bike frame. Even 60 miles range would be OK with lots of heavy throttle use for those rides with off-road motorcycles. But i want the extreme range for remote touring, and cruise at 60KMH or something with a ...
by MadRhino
Dec 21 2011 11:18pm
Forum: General Discussion
Topic: Mountain biker cops a beaut from an Antelope
Replies: 12
Views: 860

Re: WOW! Gazelle takes out mountain biker!

...The gazelle probablt weighs MORE than the biker... Yep, and that is because it is not a gazelle. :wink: This was an antilope. The guy is lucky somehow, that he was not riding DH with big trees around. Do you find many antelope on DH mountains with lots of trees around? :mrgreen: Luckily not. :mr...
by MadRhino
Dec 21 2011 11:12pm
Forum: E-Bike General Discussion
Topic: ----WAYNE'S GIANT DH----video now on page 4
Replies: 80
Views: 18121

Re: ----WAYNE'S GIANT DH----

waynebergman wrote: Am I correct in thinking this way regarding spoke tension for a narrow hub like I have here?
When you dish a wheel, the spoke tension is still even on both sides, it is the effective spoke lenght that is not the same on the dished side.
by MadRhino
Dec 21 2011 10:58pm
Forum: E-Bike General Discussion
Topic: Ft.Collins CO City Council meet TONIGHT: eBikes on trails?
Replies: 71
Views: 8322

Re: Ft.Collins CO City Council meet TONIGHT: eBikes on trail

There is a good chance you are oblivious to what is going on around you I know they will ban Ebikes from the bike paths, they are banned already in some areas of the city. In fact, I agree. I don't believe that Ebikes should be limited to 32 Kmh, and I don't believe they should use the bike paths. ...
by MadRhino
Dec 21 2011 4:51pm
Forum: E-Bike General Discussion
Topic: HS3540 cooling 80v and lyen 24fet 4110 controller settings
Replies: 3
Views: 724

Re: HS3540 cooling 80v and lyen 24fet 4110 controller settin

Your 18 fet controller likely failed because of the shorted phase. It is more than enough controller for this motor. A 24 fet controller can fry an HS motor uphill in no time, so program it conservatively. 150A phase current with 24s Lipo, can feed the motor 15 000w. If you want to feed that kind of...
by MadRhino
Dec 21 2011 4:30pm
Forum: General Discussion
Topic: Mountain biker cops a beaut from an Antelope
Replies: 12
Views: 860

Re: WOW! Gazelle takes out mountain biker!

TonyReynolds wrote:...The gazelle probablt weighs MORE than the biker...
Yep, and that is because it is not a gazelle. :wink:
This was an antilope.

The guy is lucky somehow, that he was not riding DH with big trees around.
A friend of mine got killed crashing on a tree after hitting a deer in a DH trail.
by MadRhino
Dec 21 2011 12:21am
Forum: E-Bike General Discussion
Topic: Extreme range e-bike?
Replies: 174
Views: 14361

Re: Extreme range e-bike?

....But I agree with most people here - Going 80km/h on a pushbike is insanity incarnate. You even look at the 50cc Honda Cubs. Their official top speed is 80km/h. Their tyres are much wider than even mountain bike tyres, the frame is stiff, the majority of the weight is between the two wheels and ...
by MadRhino
Dec 20 2011 12:30am
Forum: E-Bike General Discussion
Topic: Winter Riding, keeping warm.
Replies: 52
Views: 9552

Re: Winter Riding, keeping warm.

Haha, I guess one has to get used to the cold with the latitude. Today was -10 and I started wearing gloves to ride. Not wearing the winter hat yet, but felt that I should soon. The wind was enough yesterday to ride uphill kite surfing if I had a Veltop on my bike. :D Winter commuting would not be s...