Amflow HMC-30 29" Carbon Fiber Wheels Size:Rear Only it provides excellent chain retention

it provides excellent chain retention and less chain vibration even on bumpy trails

Rear Derailleur: Shimano GRX RX-812

It’s optimized for the 13-tooth gap between X-Range rings

8Deg Black +/-6 Angle

five individual sprockets with spacers in aluminum 7075 and an initial triple or quadruple: this construction gives the cassette optimum lightness and reactivity

Amflow HMC-30 29" Carbon Fiber Wheels Size:Rear Only it provides excellent chain retentionMade of high strength carbon fiber materials, the lightweight design significantly reduces the overall weight, enhancing maneuverability and acceleration performance of Amflow PL. Specifications Rims: Lightweight hookless carbon fiber rims, tubeless ready, 28 holesRim width: 30 mmFront hub: Ultralight alloy, straight pull spokes, 15 110 mm thru axle, 6 bolt disc brake mountFront wheel spokes: SAPIM E Light straight pull, 2. 3 1. 7 2. 0 Mfr Claimed