I just purchased a CX bike for the winter months and switched the 105 9spd (which is in great shape and will be for sale in the classified) to Sram Force 10spd (my TT bike is SRAM) and am wondering if I should change the rings on the front. Currently the rings are 48/39 on a standard 172.5 cranks the back gears will be Sram 11-25/26, I may ride cross though most of my riding will be on the road.

My TT bike I ride has 50/36 compact rotor rings on 175 crank arms and Sram 11-25/26 rear.

So should I change the 48 to a 53 to mimick road riding gears, I ask because I have not installed the new chain yet and if I go 53 then I should not cut the chain for the current 48.

I am thinking I will keep the standard road rings as opposed to moving to rotor rings on the CX as I have spent the summer on the rotor rings and am thinking that this will help me in my pedaling on standard road rings. Best of both worlds?

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