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View Full Version : New Trek bike, belt driven



bugzy
08-26-2009, 04:44 PM
Trek Bikes | Bikes | Urban | District Carbon (http://www.trekbikes.com/us/en/bikes/urban/district/districtcarbon/)


http://cache.gawker.com/assets/images/4/2009/08/500x_districtcarbon_black.jpg

gtiador
08-26-2009, 04:51 PM
Do I have to start worrying around 60,000 miles? :D

Looks like a rad bike

bugzy
08-26-2009, 04:52 PM
Do I have to start worrying around 60,000 miles? :D

Looks like a rad bike
id be more worried about your legs and arms at 60k miles on a bike ;)

URQ
08-26-2009, 04:57 PM
For one of the bike messenger wannabe's it is great, cause they don't put much force down at one time but for a Trackie it would not last one good stroke!
I think its a cool idea for a commuter because its something different.
I mean just think you never have to oil it.I do think there would be a lot more resistance then with a chain tho?

Paul
08-26-2009, 05:04 PM
the belt's actually very efficient. Like you mentioned, no oil, super quiet, low maintenance. Only issue is limited frame support. The dropout has to split to let the belt pass through the rear triangle.

Ivan
10-27-2009, 09:49 PM
BS
if a belt can handle 500hp on a car, it could handle 0.001hp, and I
don't think that belt is thinner then a sheet of paper because that's how thin it has
to be to snap under human power.

How does it change gears though?

TornadoBurg
10-27-2009, 09:57 PM
I built one of these for a customer about 2 weeks ago, things super sick, thing dosent make a single sound and it weighs less than a feather.

mike
10-27-2009, 10:32 PM
A serpentine belt on a car can hold up an engine................ this should put up with whatever you can throw at it. No oiling, quiet, how long until someone adapts a variable V Pulley set up on the crank and wheel like a CVT for infinitely variable gearing?

gtiador
10-27-2009, 10:32 PM
How does it change gears though?

It looks like it's a single speed, either fixed or free.

Ivan
10-28-2009, 01:33 AM
So gears not possible?

TornadoBurg
10-28-2009, 06:42 AM
i dont see gears and belts every being possible or it would have been done already, chains can take the beating of being thrown up and down a cassette, rubber wount be able to do that with being damaged

Paul
10-28-2009, 06:49 AM
they have geared belt systems. They simply put the gears inside the rear hub, the belt doesn't directly drive the rear wheel.

DTolo
10-28-2009, 08:26 AM
I could damn near buy my GSXR again at the price of that bike.

TornadoBurg
10-28-2009, 10:09 AM
haha yeahh we have a full on time trial bike with full shimano Di2 automatic shifting, bike costs more than my car when it was NEW

aquabat911sc
10-28-2009, 04:02 PM
There was a lot of talk about belt drives at Interbike this year. The big hurdle is the rear triangle pass through. Basically you have to buy a frame that was made for belt drive. There is no way you are going to snap one of those belts, even a track cyclist.
http://motorlust.com/motorlust/gallery/interbike-las-vegas-2009/interbike-09-58.jpg
The belts and two pulleys weigh less than just the chain on a normal bike. But obviously only one speed.
http://motorlust.com/motorlust/gallery/interbike-las-vegas-2009/interbike-09-42.jpg
Shimano now has an eight speed internal rear hub I believe and I saw a planetary crank set that did three speeds.

Belt drive is aimed mostly at commuters for right now, but it may make its way to more performance oriented bikes soon. Interbike was all about single speed 29ers, it would be perfect for that. There was at least one shaft drive bike at the show that I personally thought was even cooler than belt.
http://motorlust.com/motorlust/gallery/interbike-las-vegas-2009/interbike-09-51.jpg