Big Ceramic Hybrid bearings to fit Trek's own BB90 (road) & BB95 (mountain) internal bottom brackets with Shimano HT2 cranks.

Shields are included to protect the bearings from direct contaminant entry.

Ceramic hybrid bearings have a conventional steel outer race but with ceramic balls inside. The harder ceramic balls roll a little easier, weigh a little less and the bearings have been designed to minimise rolling friction.

These bearings are not recommended for mountainbiking applications as they are virutally unsealed and only suitable for dry conditions.