45 is the Colnago standard, though it´s sometimes known as ThreadFit82.5.
This kit allows you to install Campagnolo and Fulcrum Ultra-Torque cranks on your ThreadFit bb Colnago.
CeramicSpeed Bearings come installed in cups and are connected through the shell.
There are two versions:Standard and Coated Bearings.
Both have super round CeramicSpeed Balls and hardened-steel races.
The Coated have an additional attribute:a 3-micron thick metallic layer over the races.
This addition makes the races harder and smoother, lowering drag and increasing life.
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