ZEB Ult B1 Lower

This is the complete lower leg assembly for the RockShox ZEB Ultimate B1+ fork from the 2027 model year onward. It brings the arch, the brake mount and the 15 x 110 mm Boost dropouts together as one service unit, which is the normal repair path once a casting is damaged or the bushings have worn past their service limit.

The assembly arrives with seals and bushings already fitted, so no separate seal kit is needed for the rebuild. Ultimate decals are included under the clearcoat. Fitment is specific to 29 inch ZEB Ultimate B1+ forks running 38 mm upper tubes. The brake mount takes a 200 mm rotor as a minimum and accepts up to 220 mm.

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