The On Track Wheel 27.5" Rear Cass Boost Sx44 Black is designed for cyclists seeking a robust and high-performance wheel. Featuring a durable Alex MD30 rim with a 30mm internal diameter, this wheel provides excellent support and stability for various riding conditions. The Boost spacing enhances strength and responsiveness, while the 6-bolt disc brake system ensures reliable stopping power. Compatible with 8, 9, and 10-speed drivetrains, this wheel is an ideal choice for both casual riders and serious enthusiasts looking to upgrade their bike's performance.