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Recreational Cyclocross and Gravelbiking This has to be the most physically intense sport ever invented. It's high speed bicycle racing on a short off road course or riding the off pavement rides on gravel like :The Dirty Kanza". We also have a dedicated Racing forum for the Cyclocross Hard Core Racers.

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Old 08-03-14, 08:40 AM   #1
telebianchi
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Shimano 105 group: 2003 9-speed vs. 2006 10-speed

I've had my Fuji Cross since new in spring 2003. It came with 9-speed 105 drivetrain. Current crankset is FSA Gossamer with 46/34 rings. Several years back I switched to a mountain bike rear derailleur so I could run a 11-28 or 11-32 cassette. I also have a no-longer-used 2006 K2 road bike that has full 105 plus Ultegra rear derailleur. This handles up to a 28 big cog.

The bike sees a mix of commuting (on 700x28 tires), gravel/dirt road & trail rides (did 130 miles on a single June day on the C&O Canal Towpath), some just for the fun of it single-track in the woods, and a couple of CX races. I've had a really good spring & summer on the road bike and hope to take advantage of those miles by training for and racing in 5 to 7 CX races this fall.

The question I am wondering is whether it would be worth the effort to move the 10-speed group to the Fuji. I might miss the 32 cog on some of the single-track stuff but not anyplace else. The 10-speed group shifts better as currently set up. I can do all the work myself so the only extra costs might be cables & bar tape (probably could use new cables for the Fuji regardless).

Opinions?

Thanks.
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Old 08-03-14, 10:32 AM   #2
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I have a number of divetrains, including 9 speed and 10 speed. I would not spend the time or money changing a fully functional divetrain. Once the bike needless an overhaul, you might make the change-over.
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Old 08-03-14, 11:51 AM   #3
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You should have a specific gear ratio you really miss and the only way to get it is whole drivetrain surgery ..

I suspect a tooth or 2 more or less substituting a different chain ring, or a same speeds count cassette, but different cog tooth counts will do .

the economy always welcomes the spending of money..
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