Our Classic front Brompton hubs are available in 16, 24, 28, and 32 spoke hole configurations (other spoke hole count options are available upon request). We also offer our front Brompton hubs with 2 bearing options: Standard Phil spec bearings which have full contact seals and have a 100% fill with our Phil Waterproof grease. Carbonyte Phil spec bearings are our low drag bearing option which have partial contact seals and have a 30% fill with our full synthetic Phil Carbonyte grease.