・Compact design includes an integrated wireless unit

delivering exceptional comfort and cooling performance when temperatures rise

allowing for the connection of 30mm spindle cranksets to narrow 35mm diameter

Featuring the exclusive Cranks & Coffee design

and comfortable with the Pas Normal Studios Mechanism Thermal Jacket

sram chain red e1 flattop silver 12 13 speed Product Type_ Bottom Bracket ・Compact design includes an integratedSRAM's RED E1 Flattop chain delivers precision engineering for modern 12 and 13 speed drivetrains. The flattop design reduces weight while maintaining exceptional strength and durability. Silver finish resists corrosion and complements contemporary groupsets. Engineered for smooth, reliable shifting across the entire cassette range, this chain maximizes power transfer and minimizes drivetrain noise. Ideal for road cyclists demanding professional grade