which minimises noise

or Full Metallic compound for the best stopping power without caring about noise

This particular product is a Standard Mount 210mm x 55mm

the Royce is your go to XC

Crank Brothers Synthesis Carbon E-MTB Wheelset - Front and Rear - 29 Inch - 15x110mm Boost & 12x148mm Boost - Carbon - 31.5mm - 6 Bolt - XD Driver Dropship which minimises noiseUltimate control and stability for E MTB trail riding. The Crankbrothers Synthesis E MTB Carbon wheelset is purpose built to enhance control and stability for pedal assist all mountain and trail riding. With front and rear specific tuning, this system is designed to meet the unique performance demands of E MTB ridingcompliance up front for superior grip and handling, and stiffness in the rear for maximum power transfer and stability under heavy loads.