Originally Posted by
dnewnham
My Allez Double Steel has a Shimano 2300 crankset with 52/39T chain rings. I would like to upgrade to a Shimano Ultegra FC-6500 39/53T mainly because it looks a lot cooler, and perhaps could save a little weight. I have a few (possibly dumb) questions:
1. What exact type of Octalink bottom bracket will I need to buy (thread type and shaft length?)
2. As the large chain ring has one extra tooth, will I need to move the forward derailleur up to make room?
3. What type of crank puller and bottom bracket tool/s will I need?
4. Will there be any issues with alignment between the new chain rings and the 8 speed cassette that I might need to deal with?
Thanks!
Dale
1) 68mm 1.37x24 English 109.5 Octalink v1 Either the BB-5500, or the BB-7700/7710. 105/Dura ace version. You'll have trouble finding the ultegra version of that bb-6500
2) Double check correct clearance 1-3mm at the top. One thing you did miss is double checking that the chain length is correct. If it was already too short, or marginally short on the 52 x blah then it'll probably explode.
3) Park Tool CCP-44
4) Not even sure what that means.