I have a 55cm Litespeed Natchez frame, Campy Racing T crankset of 8 speed vintage with the original rings, 9 speed upgrade with less than 3000 miles on the cogs, and less than 1/16" inch (maybe 2/3 that - my ruler doesn't have finer gradations) chain stretch on 12" of chain (installed at the same time as the cogs).
I weigh 150 pounds and have a backpack + laptop + lock combination that can't add over 15 pounds. Think spindly computer geek not clydestale.
In the last week I've stood up twice (once accelerating on flat ground, once going up a hill), had the cranks spin forward, and crashed. OW. It's never done this before.
On Wed, 8 Sep 2004 18:59:45 -0600, [email hidden] (Drew
Eckhardt) said:
In the last week I've stood up twice (once accelerating on flat ground, once going up a hill), had the cranks spin forward, and crashed. OW. It's never done this before.
It it happened while using he 42t ring on the racing T, the ring may be worn. Replace the chain and ring. The 42 ring for a triple is costly. A 42 for a double, w/o shift assists works fine too. If you want to save $, Vuelta may have a 42 x `35 bolt pattern. Sometimes, rotating the middle ring 90 degrees will solve your problem for a while.
"Drew Eckhardt" <[email hidden]> wrote in message news:[email hidden]...
Quoted message said:
I have a 55cm Litespeed Natchez frame, Campy Racing T crankset of 8 speed vintage with the original rings, 9 speed upgrade with less than 3000 miles on the cogs, and less than 1/16" inch (maybe 2/3 that - my ruler doesn't have finer gradations) chain stretch on 12" of chain (installed at the same time as the cogs).
I weigh 150 pounds and have a backpack + laptop + lock combination that can't add over 15 pounds. Think spindly computer geek not clydestale.
In the last week I've stood up twice (once accelerating on flat ground, once going up a hill), had the cranks spin forward, and crashed. OW. It's never done this before.
What's going on?
My chain did that to me three times up an 8% grade before it finally broke. One of the plates popped off the pin. My guess is that the plate was bulging before it came right off, and that's why it kept coming off the chain ring. Luckily a guy behind me had a chain tool.
drew-<< In the last week I've stood up twice (once accelerating on flat ground, once going up a hill), had the cranks spin forward, and crashed. OW. It's never done this before. >><BR><BR>
Suspect something is amiss in your rear hub freehub. The pawls are not engaging, causing the whole thing to not engage. Need to take apart, analyze the freehub.
Peter Chisholm Vecchio's Bicicletteria 1833 Pearl St. Boulder, CO, 80302 (303)440-3535 http://www.vecchios.com "Ruote convenzionali costruite eccezionalmente bene"
