in message , Tony Raven
') wrote:

Tosspot wrote:
D.M. Procida wrote:

Tosspot wrote:

Perusing the LBS in search of rims, hubs and spokes I spotted a
little folder with a Nexave 7-speed hub and a belt drive.

Sooo...why don't we see more belt drives? Maintenance free, tough
as tarmac, used on motorcycles and cars so proven technology.

Ok, I note it's going to be tricky with a Campag-10 setup, but
still.

I was going to ask exactly the same question. Just think, no moving
parts.

No chain lube, no powerlinks, no cleaning!

No efficiency either. Plus tend to slip under power unless you use a
heavy belt under high tension.

Or teeth.

I suspect efficiency may be part of it, but probably the main reason
belt-drive kits are not available for conventional bikes is because of
the seat-stay. Either you'd have to have a removable drive-side
seat-stay, or no drive side seat-stay (cantilevered chain-stay), or
you'd have to mount the rear pulley on the outside of the
seat-stay/chain-stay, because, unlike a chain, you can't break and
rejoin a toothed belt.

All this is possible of course but you can't retrofit it to a
conventional frame design.

--
(Simon Brooke) http://www.jasmine.org.uk/~simon/
Das Internet is nicht fuer gefingerclicken und giffengrabben... Ist
nicht fuer gewerken bei das dumpkopfen. Das mausklicken sichtseeren
keepen das bandwit-spewin hans in das pockets muss; relaxen und
watchen das cursorblinken. -- quoted from the jargon file