Campagnolo Record 12 Chainring Teeth: 52 Speed: 12 BCD: 145 Bolts: 4 Outer Aluminum Black FC-RE952 CheckoutTitle=RockShox SIDLuxe Ultimate Flight Attendant Shock EcoProTeQ weatherproofing surpasses a 650

EcoProTeQ weatherproofing surpasses a 650 hour salt spray test to offer outstanding anti-rust defense for worry-free operation and low maintenance

The Wolf Tooth Direct Mount Chainrings for Bosch E-Bike Motors are compatible with all Boost and Super Boost bikes that use the Bosch Gen 4 E-Bike Motor

} EA50 aluminum mast with forged aluminum 2-bolt clamp

Wolf Tooth 107 BCD Chainrings for SRAM Cranks are compatible with SRAM gravel and road cranks that use the 107 BCD spider

The narrow side allows clearance for mud and debris which reduces friction

Campagnolo Record 12 Chainring Teeth: 52 Speed: 12 BCD: 145 Bolts: 4 Outer Aluminum Black FC-RE952 CheckoutTitle=RockShox SIDLuxe Ultimate Flight Attendant Shock EcoProTeQ weatherproofing surpasses a 65012 speed Record Super Record chainring Surface treatment improves durability 145 BCD outer rings are specific to Record or Super Record, while 112 BCD inner rings are shared between the two groups TECH SPECS Primary Color Black Chainring Comp. 36 52 Narrow Wide Design No Position Outer Teeth 52 BCD 145 Chainring Bolts 4 Speed 12 Material Aluminum