MAXhit is Enduro's latest patent-pending innovation; where the bearing is actually the component. MAXhit bottom bracket bearings are designed to thread directly into your bicycles bottom bracket shell, eliminating the need for the aluminium cups that are traditionally used to carry the bearings. This unique design frees-up space for much larger balls that more than double the load capacity compared to standard BB bearings. The kit includes a full selection seals and spacers to ensure proper installation in any BSA threaded bike. Machined entirely from 440C stainless steel and guaranteed for life, Maxhit BB bearings include proprietary double-lip labyrinth seals and Enduro's extra high pressure grease to ensure a lifetime of trouble-free, heavy duty performance. We are so confident in performance and longevity of this new innovation that we offer a full LIFETIME warranty that also covers corrosion. The Enduro line of BB bearings begin with chromium steel, Black Oxide finish A/C type and then offer full 440C stainless steel at the top. They are always engineered with the largest balls possible and dual lip seals riding in a micro-groove for ultimate protection against sweat and the elements. They are filled 90% with high pressure water proof grease, so you never have to guess if there is grease inside. Enduro Angular Contact (A/C) bearings, all balls are engaged to spread the force over a larger surface area, pressure water and minimizing wear. Shell Fitment: BSA Bearings: 440C Stainless Steel AC Seal Type: LLB Grease CRC Marine Grease Axle Size: 24, 30mm. DUB Warranty: Limited Lifetime Enduro Reference Numbers:  24mm - BKSM-8112 30mm - BKSM-8142 DUB - BKSM-8132