A BB30 set up is hard on bearings due to the narrow spacing between the bearings, which can lead to increased wear and tear over time. If durability is your priority over shaving those last few milliwatts of performance, especially in demanding conditions, we recommend using the cross bearings on road bikes. These bearings offer greater resilience, making them an excellent choice for riders who value longevity alongside performance. Select cross bearings for Cyclo-Cross (CX), mountain bikes, and commuting. Kogel's ceramic bearings are a fantastic option, as they combine smooth rolling efficiency with superior durability, perfect for handling the varied stresses encountered during off-road rides or daily commutes.