Crank Brothers Synthesis AL XCT XC Trail I9 Rear Wheel - Shimano HG Splined - Black - 12x148mm Boost - 6 Bolt - Rear - 29 Inch YGroup_7525299257389 The 39mm end is the

The 39mm end is the right size for XTR BB93 (as well as DuraAce 9000 and some Token BB's) external bottom brackets

With it's quick release system

Min Rotor Size: 200mm

Cons: Not much

The lowest offers up 15 lumens and the longest runtime of a claimed 53 hours

Crank Brothers Synthesis AL XCT XC Trail I9 Rear Wheel - Shimano HG Splined - Black - 12x148mm Boost - 6 Bolt - Rear - 29 Inch YGroup_7525299257389 The 39mm end is thePrecise 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,