Diameter: This is a 31

Perfect for all-year-around maintenance to keep your bike protected

Closure: Adjustable power zone BOA wire guide with front strap holds forefoot securely

These Elbow Guards are for hard-charging XC and Trail riders that want a little bit of extra protection to guard against abrasions without constricting movement or sacrificing comfort

SRAM Frame Maxle Rear Axle - Rear - 180mm Axle Length - 20mm Thread Length - M12 x 1.75mm Thread Pitch Images Uploaded - Ready for Review Diameter: This is a 31Need a replacement rear axle? RockShox has you covered. RockShox Rear Maxles come in all the common sizes and are a great replacement for Maxle style dropouts. Size Options: 12x142mm 174mm Long M12x1. 75 Also available in the Stealth version. 12x142mm 195mm Long M12x1. 75 Thread 20mm Long (Split Pivot) BOOST 12x148mm 180mm Long M12x1. 75. BOOST 12x148mm 188mm Long M12x1. 75. Please note: The Stealth axle does not use a QR lever, it is bolt on only.