Stan's Crest MK4 Rear Wheel When you're looking for a lightweight Gravel and XC wheelset built to roll fast and last forever the aluminum Crest MK4 is your wheelset. Features25mm rim width optimized for Gravel and XC tires up to 2. 3"Light and durable 6069 aluminum with welded joint and reinforced spoke bed BST-Asymmetric design combines Stan's legendary easy tubeless inflation with a stronger more balanced wheel build M-pulse ultra-low drag magnetic pawl adjustable hubs with 1. 66 deg engagement Enduro bearings with double-row freehub bearing Matched wheelsets use traditional J-bend lacing and share a single spoke length for easy serviceability Includes tubeless tape and presta valves | Stan's No Tubes | Stan's Crest Mk4 Rear Wheel Rear 12X142Mm Hg 6B Black | Aluminum