Gutter Seal Technology drastically improves sealing against the elements while reducing seal drag. We’ve designed a fresh cup forging for a high-end look. A new standard in external bearing performance.GXP’s Gutter Seal design cuts friction & weight—improving both feel & performance. Other systems rely on side-loaded bearings to eliminate play, causing bearing wear. GXP captures the left-side bearing between the spindle & the left crankarm & allows the drive-side bearing to float axially on the spindle. There's no need to side-load bearings during adjustment. No excess wear. & a much simpler installation. Just tighten to the proper specifications & you're ready to roll, worry-free. GXP's two bicycle-specific cartridge bearings & eight seals ensure a smooth, long-lasting ride. Our new Gutter seal system takes a two stage approach in directing contaminates away from the bearings providing longer bearing life. GXP s Gutter Seal design also reduces friction, 35% less drag than the current GXP BB, improving rider feel & performance. Gutter seal system has deeper installation tool grooves which provide stability & support while applying torque to the adapter cups. The design & material choice has dropped 15g out of the GXP BBs.