RockShox ZEB A1+ DebonAir+ Buttercup Air Spring Upgrade Kit - 150 mm ZEB A1+ MFPN=BAA1189R 36t is the smallest number

36t is the smallest number of teeth that fits on a 120 BCD

WTBs I-Beam construction has evolved to further reinforce the rim with dual support beams that provide increased strength and stiffness for the worlds most aggressive riders

Rear Derailleur: Shimano XT RD-M8100 SGS Shadow Plus / 12 SpeedCassette/FreewheelShimano Deore CS-M6100-12 / 10-51 T

Cane Creek Integrated 41

Bearing race material is AISI 52100 chrome bearing steel hardened to Rc 60-65

RockShox ZEB A1+ DebonAir+ Buttercup Air Spring Upgrade Kit - 150 mm ZEB A1+ MFPN=BAA1189R 36t is the smallest numberRockShox ZEB A1+ DebonAir+ Buttercup Air Spring Assembly Upgrade Kit 150 mm. The new DebonAir+ is built to strike the perfect balance of what riders really want: butter like small bump feel increased air volume to add support throughout the travel and higher overall ride height for more confidence when things get steep.