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Posted : 22/11/2015 2:31 pm
CX are ultra compact 39/46 for example - unless it's CX1 by sram.
Posted : 22/11/2015 2:32 pm
Topic starter
Ah, the the only difference is the rings, cheers.
Posted : 22/11/2015 2:36 pm
Not a huge number of people still using anything as big as 46 for cross either. 38/46 (or similar) used to be the norm when we all had 130bcd cranks. More likely to be something like 36/42 ish on a 110 bcd now. Or a single ring.
But yes, it's always been "last years" road race bike cranks with smaller rings for racing cross.
Posted : 22/11/2015 4:42 pm
Smaller difference between big and little rings also means faster shift / less chance of dropped chain.
Posted : 22/11/2015 4:54 pm
CX50 = 105
CX70 = Ultegra
Posted : 22/11/2015 5:44 pm