Cane Creek ZN40-Bearing 47mm 45 x 45 Zinc, Each Shimano 105 12 Speed All-day comfort with a generously

All-day comfort with a generously open channel dividing supportive outer zones to alleviate pressure on your sensitive bits

then a fine tunable adjustment for a precise fit

The Boa L6 dial offers 1mm adjustment increments when tightening

Shimano HG500

The result is higher speed with the same effort as well as a higher top speed

Cane Creek ZN40-Bearing 47mm 45 x 45 Zinc, Each Shimano 105 12 Speed All-day comfort with a generouslyZN40 Series bearings are corrosion resistant zinc coated, machined steel cartridge bearings with hardened steel balls, which vastly increases the longevity of your headset. Compatible with 110 , 40 , and 10 Series headsets Thickness: 7 Cartridge Bearing Angle: 45x45 Bearing O. D. (mm): 47 Bearing Type: Cartridge Bearing I. D. (mm): 34. 25