View Full Version : New Trek bike, belt driven

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


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

Looks like a rad bike

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 ;)

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?

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.

10-27-2009, 09:49 PM
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?

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.

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?

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

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

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

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

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.

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

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

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.
The belts and two pulleys weigh less than just the chain on a normal bike. But obviously only one speed.
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.