Whether you lost it, damaged it, or just want to keep abackup on hand, it's never a bad idea to have a replacement thru-axle on handto save you from a future headache. The AX-MT700 Boost Thru-Axle from Shimanois available for the rear end of your 12 x 148mm boost bike with an overalllength of 172mm and a thread pitch of M12 x 1. 5mm. It's a clean design that usesthe much-lauded Shimano cam closure system for a secure and positiveconnection, and the adjustable tension adjustment allows you to easily positionthe lever so it doesn't interfere with the dropout or disc caliper. Thelightweight aluminum construction and hollow axle allow this thru-axle to comein at a very svelte 76 grams.