Crank Brothers Synthesis E-Bike Carbon 29" Rear Wheel Tuned for e-MTB and ready to rip The Synthesis E-MTB Carbon Ratchet Rear Wheel is tuned for impact resistance, stiffness, and strength, with a separately available front wheel designed for increased control and compliance. The bespoke rim system is designed to add compliance for steering precision and grip at the front wheel, helping calm trail chatter without the vague feeling you can get from overly stiff builds. While out back, the reinforced rear rim and overall wheel build focus on stiffness and tracking when you're driving hard through corners and techy sections. The wheels roll on Crankbrothers' Synthesis Ratchet hub platform, with 10deg engagement (36t), and the option to upgrade to a quicker 54t (6. 6 degree) setup. Features Tuned wheel system front and rear rims are individually engineered with unique ride characteristics to match their jobs Rear wheel strength uses a unique carbon fiber layup to increase strength at the rear wheel where it's needed most Ratchet Drive Hub platform with a low-drag design, and a 36t ratchet for 10deg engagement (54t upgrade compatible, sold separately)Purpose-built Spoke spec Sapim E-Light front and Sapim Strong rear to match compliance vs. support needs Lifetime Rim Warranty rims are covered by Crankbrothers' lifetime warranty (rim only)Specifications Intended Use E-MTBHub Platform Synthesis Ratchet (6-bolt)Engagement10deg (36t); 54t upgrade compatible (6. 6deg)Internal Rim Width31. 5mm (front & rear)Wheel Size29"Wheelset Weight1197g | Crankbrothers | Synthesis E-Bike Carbon 29" Wheel Front 15X110 6B