mooncake
12-23-05, 11:04 AM
Can I still use my Ultegra stock short cage rear d. if I go to a climbing cassette 12-27 from 12-25? Thanks. :)
Bicycle Mechanics - Rear der capatibility if I switch from Shimano 12-25 to 12-27?
Bikeforums.net is a forum about nothing but bikes. Our community can help you find information about hard-to-find and localized information like bicycle tours, specialties like where in your area to have your recumbent bike serviced, or what are the best bicycle tires and seats for the activities you use your bike for.View Full Version : Rear der capatibility if I switch from Shimano 12-25 to 12-27?
Retro Grouch
12-23-05, 11:37 AM
Your derailleur will be fine. It may or may not be necessary to lengthen your chain by a couple of links.
mooncake
12-23-05, 01:02 PM
Your derailleur will be fine. It may or may not be necessary to lengthen your chain by a couple of links.
Any tell-tale signs that your chain length is messed up? :( :)
Any tell-tale signs that your chain length is messed up? :( :)
Retro Grouch
12-23-05, 02:01 PM
Any tell-tale signs that your chain length is messed up? :( :)
Wrap your chain around the two biggest sprockets bypassing the rear derailleur. Add one inch (two links) of chain. That's the shortest chain that you can safely use with that gear combination.
Wrap your chain around the two biggest sprockets bypassing the rear derailleur. Add one inch (two links) of chain. That's the shortest chain that you can safely use with that gear combination.
HillRider
12-23-05, 02:47 PM
Any tell-tale signs that your chain length is messed up? :( :)
RG's technique is the best one if you are installing a new chain. If you are going to use the existing chain (probably not a good idea with a new cassette) try VERY CAREFULLY to shift into the big chainring/big cog combination. If it goes in easily, no problem. If there are any signs of distress, STOP right there and plan on lengthening the chain or, beter yet, replacing it.
RG's technique is the best one if you are installing a new chain. If you are going to use the existing chain (probably not a good idea with a new cassette) try VERY CAREFULLY to shift into the big chainring/big cog combination. If it goes in easily, no problem. If there are any signs of distress, STOP right there and plan on lengthening the chain or, beter yet, replacing it.