Multi-Buy Savings!
Radiogram This is a well designed tool.
The splines are deep enough to fully engage with splines on the cups of a Campagnolo square taper BB cartridge. The wall of its splined barrel is thicker than for the Cyclus Campagnolo cassette tool presumably to tolerate the greater tightening torque needed for BB cups - 70Nm vs 50Nm for cassette lockrings.
Campagnolo cassette lockrings use the same spline pattern as their BB cartridge cups. This BB tool cannot be used for cassette lockrings because its wall thickness is too big to allow the tool to fit over the drive side rear axle assembly.
The BB tool has a 12mm hole in its outboard end. This diameter is sufficient to clear the square tapered BB spindle. The hole still permits the tool to be secured to the BB spindle end by means of a crank bolt to prevent the tool falling out of and damaging the BB cup splines when high torque loads are applied.
The tool fits a 24mm hex 1/2" drive socket. Its overall length is 25mm.
This Cyclus BB tool is superior in design to an alternative offered by a popular American manufacturer of quality bike tools. It would be preferable that it was ONC blackened like that tool instead of being galvanised. A quibble.
Great value. Recommended.