The Ultegra Cassette uses the HYPERGLIDE + technology to provide a smooth shifting in all gears and under load

In terms of stiffness

and comfortable with the Pas Normal Studios Mechanism Thermal Jacket

delivering exceptional comfort and cooling performance when temperatures rise

・Compact design includes an integrated wireless unit

sram chain red e1 flattop silver 12 13 speed Product Type_ Bottom Bracket The Ultegra Cassette uses theSRAM'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