Got a CX bike for my daughters to race on, age 11 and 13.
Gearing is a bit high for them.
It's 36/46 double and a 12-25 10 speed at the back.
rear mech is a 105 short cage.
The spec on the mech says tooth capacity is 33t, so I could go for a 12-30 cassette.
Anyone running a 30t sprocket on a 105 short cage? is it OK?