chainring/gear ratio help
04-30-08, 05:00 PM
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la rapet
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chainring/gear ratio help
so a week from saturday im leaving for a 2 week 1000 mile tour up the east coast. i think everything is ready to go but now im starting to worry about my gear ratio.
im doing the tour on a racing bike, a 2007 specialized allez with an ultegra double. the chainrings are 53T and 39T.
what im wondering is can i buy a smaller chainring for the inner position and move the 39T to the outer position and ditch the 53? If yes what brands are compatible with my cranks and where can i buy them?
its just that right now my lowest gear puts me at like 12 mph when im spinning at my preferred cadence. this just isnt going to work because i wont be able to shift down from there when we hit the hills or headwinds. if this is possible it seems like a good inexpensive solution that can get me through this trip. if i get into this and decide its something i want to do again i will most likely be building up a proper touring bike.
thanks for your help
im doing the tour on a racing bike, a 2007 specialized allez with an ultegra double. the chainrings are 53T and 39T.
what im wondering is can i buy a smaller chainring for the inner position and move the 39T to the outer position and ditch the 53? If yes what brands are compatible with my cranks and where can i buy them?
its just that right now my lowest gear puts me at like 12 mph when im spinning at my preferred cadence. this just isnt going to work because i wont be able to shift down from there when we hit the hills or headwinds. if this is possible it seems like a good inexpensive solution that can get me through this trip. if i get into this and decide its something i want to do again i will most likely be building up a proper touring bike.
thanks for your help
04-30-08, 07:18 PM
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la rapet
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they make triples with 30T chainrings dont they? how does that work?
04-30-08, 08:59 PM
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Sheldon (pbuh) has a page with different BCDs and what the smallest ring can go on them. Actually it is the BCD part of his glossery.
https://www.sheldonbrown.com/gloss_bo-z.html
https://www.sheldonbrown.com/gloss_bo-z.html
