Search found 6873 matches

by MadRhino
Jan 10 2012 5:12pm
Forum: E-Bike Technical
Topic: Off road trail Ebike + home-to-work ebike: need some help
Replies: 16
Views: 1182

Re: Off road trail Ebike + home-to-work ebike: need some hel

If you have no problem riding a dirt bike on the street, then make it for dirt. You can have a very good traction on pavement with 2.7 or 2.5 X 26 DH racing tires, but they will be noisy and wear fast. If you have no problem riding fast in the trails, then your dirt bike can be a very good commuter....
by MadRhino
Jan 10 2012 9:45am
Forum: E-Bike Technical
Topic: Choosing the correct motor wind
Replies: 16
Views: 1902

Re: Choosing the correct motor wind

Every motor has a different copper fill with various windings. Riding the mountain with 26 in wheels, I found that choosing the winding that fills the motor with a greater copper mass is better. Then, pulling the best of it has to be achieved by adjusting voltage and current.
by MadRhino
Jan 09 2012 3:38pm
Forum: E-Bike General Discussion
Topic: Magic pie 3
Replies: 84
Views: 19131

Re: Magic pie 3

Don't worry, this motor can take much more than 1500 W :D
Efficiency is more about how you ride and how much power you feed, the difference of peak efficiency between DD hub motors is not so important.
by MadRhino
Jan 09 2012 5:16am
Forum: E-Bike General Discussion
Topic: Magic pie 3
Replies: 84
Views: 19131

Re: Magic pie 3

cwah wrote:It's advertised 30% more torque. Isn't that somewhat more efficient? Or did they just reduce the speed to increase the torque?
It is also advertised as a 1500W motor.
Integrated cooling makes it possible to feed more current, likely 30% more power.
by MadRhino
Jan 09 2012 4:53am
Forum: E-Bike General Discussion
Topic: Hey, guys. Check out this bike. Great candidate for Ebike
Replies: 28
Views: 2537

Re: Hey, guys. Check out this bike. Great candidate for Eb

MR, I'm not arguing whether Al is inferior to CrMo in terms of chassis material or not, it's just the other post is untrue. Right, and I explained why steel is used for the vast majority of Ebike builders. In my opinion the biggest drawback of AL is fatigue. I'm not much over 60kg and yet I cracked...
by MadRhino
Jan 09 2012 3:41am
Forum: E-Bike General Discussion
Topic: “Electrification will kill the mechanical bicycle”
Replies: 37
Views: 2473

Re: “Electrification will kill the mechanical bicycle”

Remember the combustion engine was supposed to kill the horse. Well, I've had my share of gassers in my life, and I have none anymore, but I still have horses. One day in the (hopefully near) future, the combustion engine will disappear, and people will still love the horses. The Ebike has a good pl...
by MadRhino
Jan 09 2012 2:47am
Forum: E-Bike General Discussion
Topic: Hey, guys. Check out this bike. Great candidate for Ebike
Replies: 28
Views: 2537

Re: Hey, guys. Check out this bike. Great candidate for Eb

Some of the most intense builds on this forum are aluminum Yeah, which are?? All Stealth bikes - steel Greyborg frames - steel Phasor cycles -steel recumpence yellow trike - steel Lenk42602's - steel Dogati - steel AJ's - steel PaulD -steel and of course Luke's - steel and many, many more.. Of cour...
by MadRhino
Jan 08 2012 10:51pm
Forum: E-Bike General Discussion
Topic: Bike Suspension Design Help
Replies: 34
Views: 3402

Re: Bike Suspension Design Help

We are off topic, I have to create a thread some day. I destroyed my phone in a crash in the mountain, I yet have to recover the pics and vids on the micro SD card. I have 2 short vids, the A-line is in its final configuration (winter setup) but the Demo 8 was a temporary setup in the first days of ...
by MadRhino
Jan 08 2012 9:34pm
Forum: E-Bike General Discussion
Topic: larger disc brake
Replies: 9
Views: 893

Re: larger disc brake

Use 203mm, that is the standard today. When you buy the brake set, buy the specific disc and caliper adapter altogether. Most disc brake calipers work much better with their own specific disc, with some you have choice of 2 disc quality and you can upgrade for a small extra at purchase.
by MadRhino
Jan 08 2012 9:23pm
Forum: E-Bike General Discussion
Topic: New House - the good news and the bad news
Replies: 45
Views: 2976

Re: New House - the good news and the bad news

A statistician is someone who can have his feet in the oven and his head in the freezer, yet saying that statistically it feels good. :mrgreen:
by MadRhino
Jan 08 2012 9:03pm
Forum: E-Bike General Discussion
Topic: Hey, guys. Check out this bike. Great candidate for Ebike
Replies: 28
Views: 2537

Re: Hey, guys. Check out this bike. Great candidate for Eb

Then make it simple. You don't need it to be simple when you buy it. Chose one for the qualities that make a safe Ebike: Stiff frame, disc brake mounts, slack steer angle, clearance for big tires. When you build it, make it what you want. If you prefer a single freewheel, a fat seat or cruiser handl...
by MadRhino
Jan 08 2012 8:48pm
Forum: E-Bike General Discussion
Topic: Bike Suspension Design Help
Replies: 34
Views: 3402

Re: Bike Suspension Design Help

madrhino, I can't find your ebike build thread. what ebike are you currently riding? len Sorry, the build is not documented. I ride the Demo 8, although I shouldn't, for the dirty slushy winter is not very good for its fancy lightweight components. But, it rides so good that I leave the A-line slee...
by MadRhino
Jan 08 2012 8:27pm
Forum: E-Bike General Discussion
Topic: Hey, guys. Check out this bike. Great candidate for Ebike
Replies: 28
Views: 2537

Re: Hey, guys. Check out this bike. Great candidate for Eb

neptronix wrote:That's the toughest looking frame i have ever seen. who makes that damn thing?
One of my favourites. That is an Intense M9, very tough frame with 81 combinations adjustable geometry, but you can find a few that are even better if toughness is the only criteria.
by MadRhino
Jan 08 2012 8:17pm
Forum: E-Bike General Discussion
Topic: Hey, guys. Check out this bike. Great candidate for Ebike
Replies: 28
Views: 2537

Re: Hey, guys. Check out this bike. Great candidate for Eb

You're stucked to material, and can't see structural strenght.

This alu frame can safely ride 80 Mph offroad and take 30 ft drops, that would turn the steel fixie frame into a pretzel. :mrgreen:
by MadRhino
Jan 08 2012 7:42pm
Forum: E-Bike General Discussion
Topic: Hey, guys. Check out this bike. Great candidate for Ebike
Replies: 28
Views: 2537

Re: Hey, guys. Check out this bike. Great candidate for Eb

...But it looks pretty solid. Nope, it doesn't look pretty solid to me. Only good for low power setup, to ride smooth pavement and avoid potholes and curbs at all cost. It is not even a good pedal bike IMO. It is cheap, that is its only quality. That one looks pretty solid. :wink: http://www.velove...
by MadRhino
Jan 08 2012 5:43pm
Forum: E-Bike General Discussion
Topic: Bike Suspension Design Help
Replies: 34
Views: 3402

Re: Bike Suspension Design Help

A good part of your wheelbase has to come from the equation of steer angle vs fork travel, that would be around 66° angle and 8" travel. The rest has to be splitted between the frame and swingarm lenght, yet the frame lenght has to be matched to your body size. The effect of a longer chainstay is to...
by MadRhino
Jan 08 2012 1:47pm
Forum: E-Bike General Discussion
Topic: Bike Suspension Design Help
Replies: 34
Views: 3402

Re: Bike Suspension Design Help

You sure have a point there, for taming the weight of a heavy hub is a problem that can be solved with a heavier spring, and I did. Then, I created another problem for I had a shorter sag. I had a better rebound control over bumps, but lost part of the travel available for holes. I tried another app...
by MadRhino
Jan 08 2012 12:41am
Forum: E-Bike General Discussion
Topic: New House - the good news and the bad news
Replies: 45
Views: 2976

Re: New House - the good news and the bad news

I can safely climb a quarter mile of 20 grade, and my DH rigs have 26 in wheels. So it has to be possible to double this distance with a smaller wheel.

Take a pic to show us the scenery that you have from your balcony. :wink:
by MadRhino
Jan 08 2012 12:17am
Forum: E-Bike General Discussion
Topic: EBike beats porsche 911 gt3
Replies: 7
Views: 967

Re: EBike beats porsche 911 gt3

liveforphysics wrote:They should have my recent video.
Yep, looks like you have even more power now. Was great to see you race motorcycles, must be fun to chase them in town.
When I'll be finished with building hubbies, I must take lessons from your work to build my Gas Gas trial frame.
by MadRhino
Jan 07 2012 11:43pm
Forum: E-Bike General Discussion
Topic: Bike Suspension Design Help
Replies: 34
Views: 3402

Re: Bike Suspension Design Help

...during fast DH corners, a single pivot long swingarm with such a weight laced, will flex at least with unpredictable movements..... +1 Thus, the interest of a 2nd pivot with a link. The link design must be calculated to take best advantage of the characteristics of the shock that you chose, for ...
by MadRhino
Jan 06 2012 2:41pm
Forum: E-Bike General Discussion
Topic: Protect your batteries from thieves
Replies: 16
Views: 1582

Re: Protect your batteries from thieves

Have anyone here, had his battery stolen? I've seen some Ebike steal reported, yet never a battery alone. Your best and most convenient safety is a Xena motorcycle disc lock with integrated alarm. They are so sensitive that one can't touch anything on the bike without triggering the alarm. http://ww...
by MadRhino
Jan 06 2012 11:48am
Forum: E-Bike General Discussion
Topic: CroBorg Super Commuter
Replies: 1029
Views: 127556

Re: Greyborg Warp Build Planning

Chose a theme colour to complement the black, and make a design of that coulour and black for the canopy.
For one of my bikes that is black, I chose red. Then, selecting red accessories and components, adding some striping, all that makes a neat finished look.
by MadRhino
Jan 06 2012 2:11am
Forum: E-Bike General Discussion
Topic: another bike lock
Replies: 10
Views: 609

Re: another bike lock

Then steal the lock :mrgreen:
by MadRhino
Jan 05 2012 9:07pm
Forum: E-Bike General Discussion
Topic: another bike lock
Replies: 10
Views: 609

Re: another bike lock

Looks to me that the lock weight and cost more than the bike. :D
by MadRhino
Jan 05 2012 3:07pm
Forum: E-Bike General Discussion
Topic: New ebike store in Austin, Tx
Replies: 17
Views: 1269

Re: New ebike store in Austin, Tx

...Once gas prices spike again they will do quite well... The price of gas in Montreal this morning was 1.37 per Litre, that makes 5.18 $ a US gallon, yet everyone keep burning gas as usual Price of gas won't change the habits, unless it goes really high. It is the environmental consciousness that ...