Crank Brothers Synthesis AL XCT XC Trail I9 Rear Wheel - Rear - 29 Inch - 12x148mm Boost - Aluminium - 24.5mm - 6 Bolt - XD Driver YGroup_7959075029037 Materials: The upper is made

Materials: The upper is made from a polymesh for durability and breathability

albeit with some nice updates

Number of teeth: It is available in 30T-34T options

but it is heavier than other Shimano chain rings in the same series

Cane Creek 30mm

Crank Brothers Synthesis AL XCT XC Trail I9 Rear Wheel - Rear - 29 Inch - 12x148mm Boost - Aluminium - 24.5mm - 6 Bolt - XD Driver YGroup_7959075029037 Materials: The upper is madePrecise Handling At Full Speed. Wheels sold individually not in sets. Tuned Front and Rear Alloy Wheel System for XC riding and racing. Front and rear specific wheels tuned and optimized to address the specific performance requirements and loads of mountain bike riding. Compliant tuned front wheel improves handling and maximizes grip and control in turns. Wider inner rim width supports wider tire profile in front, increased volume and contact patch,