7900 Crank and RD on A 7800 Bike
01-03-10, 11:15 PM
#1
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Location: Memphis,TN
Posts: 18
Bikes: Cervelo R3 Lynskey R310
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7900 Crank and RD on A 7800 Bike
I looked at the Shimano compatibility chart. Not crystal.
Two Questions:
1. I have a Cervelo R3 with 7800 DA and an FSA crank. I want to add a 7900DA 53/39 crankset and a 7900 rear derailleur and keep everything else 7800. Can I do only these two upgrades? There seems to be some debate in reading older posts but not many had tried at that time.
2. Does anyone see an advantage of the 7900 crank over my stock FSA SLK crank. I have had some shifting issues with the front and feel that the crank may be the problem.
Thanks in advance.
Two Questions:
1. I have a Cervelo R3 with 7800 DA and an FSA crank. I want to add a 7900DA 53/39 crankset and a 7900 rear derailleur and keep everything else 7800. Can I do only these two upgrades? There seems to be some debate in reading older posts but not many had tried at that time.
2. Does anyone see an advantage of the 7900 crank over my stock FSA SLK crank. I have had some shifting issues with the front and feel that the crank may be the problem.
Thanks in advance.
01-04-10, 04:50 AM
#2
commuter
Shimano does not recommend this but in practise it works ok in my experience. It could depend on the frame though (exact angle of FD, exact chain line etc.)
