Classic & Vintage - What now? Trek 1100 issues

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Journeyman
03-14-05, 10:04 AM
I was riding my Trek 1100 last weekend uphill and pretty steep, switched gears and it starting missing gears and making noise. Rode it home slowly, took a look at it this weekend, I thought maybe the chain needed to be adjusted or something? I am no mechanic. When I looked it over closely I noticed the middle chainring was bent? It has about a 2 inch section that is bent towards the smaller gear. This redirects the chain towards the other gear down and when I am in the smaller gear, the bent portion catches the chain and pulls it up? How can this happen? With an older bike (1990) SunTour, can this be replaced or fixed? What about cost?

Any advice would be appreciated. Thanks.


jman

sydney
03-14-05, 10:07 AM
I was riding my Trek 1100 last weekend uphill and pretty steep, switched gears and it starting missing gears and making noise. Rode it home slowly, took a look at it this weekend, I thought maybe the chain needed to be adjusted or something? I am no mechanic. When I looked it over closely I noticed the middle chainring was bent? It has about a 2 inch section that is bent towards the smaller gear. This redirects the chain towards the other gear down and when I am in the smaller gear, the bent portion catches the chain and pulls it up? How can this happen? With an older bike (1990) SunTour, can this be replaced or fixed? What about cost?

Any advice would be appreciated. Thanks.


jmanA replacement chainring is a relatively cheap easy fix, assuming they are not riveted together,which is unlikely on that setup.
jemoryl
03-14-05, 02:07 PM
Does your Trek have the Sakae Edge triple crankset? My 1100 had a similar thing happen (small ring bent due to a dropped chain that wedged inbetween frame and ring) and was able to restore it to a perfectly usable level of flatness by gently prying with a large screwdriver. You might want to try this before trying to find a new ring....

Journeyman
03-14-05, 02:14 PM
sydney & jemoryl,

Thanks for your help with this. Maybe I can get this back into shape, I believe it is the triple ring, I will have to check later today. If I have to purchase the new parts, will the average LBS have this part for an older bike?

jman
sydney
03-14-05, 02:44 PM
sydney & jemoryl,

If I have to purchase the new parts, will the average LBS have this part for an older bike?

jmanMaybe not,depending on the BCD,but it's easy enough to order a inexpensive generic replacement.
Journeyman
03-14-05, 03:50 PM
Sydney, can you suggest a reliable source for the generic chain ring replacement?
sydney
03-14-05, 04:00 PM
Sydney, can you suggest a reliable source for the generic chain ring replacement?Nashbar, supergo, pricepoint,jensonusa excel sports.....house brand or Sugino will work.
Journeyman
03-15-05, 07:49 AM
Thanks Sydney.
halfspeed
03-15-05, 05:40 PM
Nashbar house brand are rebadged Stronglight. At least the 48T 110 BCD is.
moxfyre
03-15-05, 07:12 PM
I was riding my Trek 1100 last weekend uphill and pretty steep, switched gears and it starting missing gears and making noise. Rode it home slowly, took a look at it this weekend, I thought maybe the chain needed to be adjusted or something? I am no mechanic. When I looked it over closely I noticed the middle chainring was bent? It has about a 2 inch section that is bent towards the smaller gear. This redirects the chain towards the other gear down and when I am in the smaller gear, the bent portion catches the chain and pulls it up? How can this happen? With an older bike (1990) SunTour, can this be replaced or fixed? What about cost?

Any advice would be appreciated. Thanks.


jman
I have the 1990 model and it is a standard chainring size... 130mm I believe, but double check on that :D