Bit of a problem
My bike has a bottom bracket (Square Taper UN52E) installed with the E Type bit for the front mech.
The previous cranks/rings were LX M570.
Anyway, I left the same Front Derailleur (LX M570 E Type) and installed some Compact 94 BCD Specialites TA rings and Raceface Turbine cranks.
Now the bottom of the Derailleur blade when extended, hits the tips of the inside of the teeth on the largest chainring!
Bizarre! Why would that be? Is there something I may have done wrong? They're supposed to be slightly higher and when extended inline with the outside of the large rings teeth?
I understand these cranks need a 107mm BB? Would I need to change that? but that doesn't account for why the mech is hitting the teeth - it seems the rings are too high for the mech, or the mech needs to be lifted up a tad.
I'm probably going to change the BB for a 107mm one and ditch the mech, to get an XT M739 which will clamp onto the tube instead - but before I go out and make more work for myself and spend money, perhaps there may be a solution which'll save me time and money?
My bike has a bottom bracket (Square Taper UN52E) installed with the E Type bit for the front mech.
The previous cranks/rings were LX M570.
Anyway, I left the same Front Derailleur (LX M570 E Type) and installed some Compact 94 BCD Specialites TA rings and Raceface Turbine cranks.
Now the bottom of the Derailleur blade when extended, hits the tips of the inside of the teeth on the largest chainring!
Bizarre! Why would that be? Is there something I may have done wrong? They're supposed to be slightly higher and when extended inline with the outside of the large rings teeth?
I understand these cranks need a 107mm BB? Would I need to change that? but that doesn't account for why the mech is hitting the teeth - it seems the rings are too high for the mech, or the mech needs to be lifted up a tad.
I'm probably going to change the BB for a 107mm one and ditch the mech, to get an XT M739 which will clamp onto the tube instead - but before I go out and make more work for myself and spend money, perhaps there may be a solution which'll save me time and money?