Tool-free thru axle for SR Suntour forks.Q-Loc II is SR Suntour&';s own axle system - an expanding collet that locks into the fork leg and releases with a lever, so you get thru-axle stiffness with quick-release convenience. No 6mm hex, no threading it back in at the trailhead.This is the 15 x 110mm Boost version, part FKA100-25, in chromoly.Specs Spacing: 15 x 110mm Boost, front Material: Chromoly Weight: 128g Part number: FKA100-25 Will it fit my fork?Check the compatibility chart in the product images - it maps every Q-Loc part number to the forks it fits. Two quick checks you can do at home: Look for a 15 x 110 sticker on the fork&';s lower leg. Measure between the inside faces of the dropouts - it should be 110mm. If your fork is 15 x 100mm rather than Boost, you need a different Q-Loc axle. Bring the fork or a photo of the lower leg into Midway or Heber and we&';ll confirm before you buy.Heads upThe Q-Loc collet is a wear item. If yours stopped releasing rather than snapping in a crash, replacing the axle usually solves it - and it&';s worth keeping the fork&';s dropout bore clean and lightly greased so the next one lasts longer.