the Mid Base Layer offers all the benefits of the Polartec® Power Wool™ fabric

from intense workouts to casual outings

and packable layer designed for fall and winter rides

Attached to the rear derailleur

The perfect companion for your Zwift exercise

ceramicspeed bottom bracket ita30 blk derailleur the Mid Base Layer offersThe CeramicSpeed Bottom Bracket ITA30 Blk boasts a superior design, allowing for the connection of 30mm spindle cranksets to narrow 35mm diameter, 70mm wide threaded bottom bracket shells. The bearings are pre installed in cups and then threaded into the shell, with the option of either Standard or Coated Bearings available. These bearings feature CeramicSpeed's super round and smooth balls rolling on hardened steel races, with the Coated version