US Patent 8393794 Bicycle bottom bracket assembly

A bicycle bottom bracket assembly is provided with a support member, a bearing unit and a seal member. The support member includes a hanger mounting structure and a bearing mounting structure. The bearing unit includes an outer race, an inner race and at least one roller element disposed between the outer and inner races. The outer race is fixed to the bearing mounting structure of the support member. The seal member has a proximal end fixed to the support member and a distal end slidably contacting the inner race of the bearing unit.