I would still expect it to be a niche market for several reasons.
Not derailleur drivetrain compatible. Based on catalogs and what I
see in dealers derailleur drivetrains are on 90+% of all bikes
sold. Members here are a minority. Gear hub prices are unlikely to
ever be able to compete with cheap derailleur drivetrains.
Requires a removable piece in a chain stay or seat stay for belt
installation on normal frames so not easily retrofittable to older
Not as versatile as chain drive as far as making gearing changes to
customize a bike for a particular rider or riding conditions.
Cannot shorten or lengthen an endless belt for modifying the gear
I suspect it will make flat repair more difficult due to the
required tensioning of the belt to specifications after a wheel
removal. A loose belt will mean belt jump/slip I would think.
A drivetrain failure in Podunk may leave you SOL. Unless very
successful no getting a belt at Wallmart or doing a work around to
keep going as can many times with a chain drive if you carry a chain
The big advantage is the elimination of chain maintenance and that
is already reduced by the use of a single sprocket chain
drivetrain. Be even more reduced if chaincases were commonly
available on bikes here.
Be interesting to watch and see what problems, if any, there will be
with it and how well it succeeds. I have seen an awful lot of new
ideas for bikes introduced, many by Shimano, which disappeared in a
--- In Geared_hub_bikes@yahoogroups.com
, patrick ramstack
> The biggest change is the material, the use of carbon in the
belt makes it stiff enough to not slip or jump. The split in the
frame is the most common way to accomidate but there are some bikes
using elevated chain stays to avoid this.
> GT showed something at Eurobike that was a very clean design but
then they had a cheap belt on it.
> --- On Thu, 11/20/08, Alan Lloyd <adl2k@...> wrote:
> From: Alan Lloyd <adl2k@...>
> Subject: Re: [Geared_hub_bikes] Belt Drive Bikes
> To: Geared_hub_bikes@yahoogroups.com
> Date: Thursday, November 20, 2008, 7:56 AM
> Belt-drive was quite popular at the NAHBS in Portland earleir this
> There has to be some sort of 'break' in the right rear drop-out,
seat-stay or chain-stay to facilitate installation (and removal) of
the drive-belt - and, of course, derailleurs aren't invited!
> Alan Lloyd
> Schaumburg, Illinois, U.S.A.
> --- On Wed, 11/19/08, Rich Wood <astronut1001@ yahoo.com> wrote:
> From: Rich Wood <astronut1001@ yahoo.com>
> Subject: [Geared_hub_ bikes] Belt Drive Bikes
> To: Geared_hub_bikes@ yahoogroups. com
> Date: Wednesday, November 19, 2008, 8:15 PM
> http://www.cnn com/2008/ TECH/11/19/ chainless. bicycles.
> I believe that this has been tried before with poor results.
> Agressive riders get belt slip/jump fairly quickly. The article
> claim new belt technology however. Hope that Trek has it right.
> I would still worry about sprocket wear in wet and dirty
> however. Another company has had belt drive bikes available on
> for a while and user reviews have been less than excellent.
> Rich Wood