external cups question

Ramanujan

Hi,
I have a tool (big spanner type thing) for fitting the external cups for a Shimano hollowtech crank.
However, I was wondering, would this same tool work on campag external cups?
In other words, are the splines on the cups the same?

thanks
R

JamesB

I`ve got both Campg U-torque and Shimano hollowtech external cups ; Campag has a chamfered and rounded edge, Shimano is squarer. The Shimano tool does fit Campag buts feels a bit slack on it and given the considerable force required to tighten the cups securely (or remove them) reckon it could slip and permanently damage cup `slots`. Campag tool (a tenner or less) fits over the Campg cups better and has more contact between cups and tool.

Although you may get away with using Shimano wrench i personally would not risk it as damage coudl be expensive to sort out..........

ugo.santalucia

The Park Tool one fits like a glove on both, others may differ

Monty Dog

Whilst the cup external spline patterns are the same, there are sometimes subtle differences in external chamfers that make it more tricky with socket-type tools e.g. the original Truvativ GXP workshop tool doesn't work with Campagnolo Ultratorque. Best solution is the flat-spanner type tools where you have no problems with chamfers etc.

cycleclinic

Second the Park Tool one working with Campg cups.