Front Fork Support for Beginners Helper device for beginners Holds front fork after removing front wheel to enable to stand bike alone By changing the bottom bracket direction and installation position, it will fit multiple models Quick release skewer is floating mounted to avoid damage even if you lose balance Bottom Bracket Combination 360mm Width Roller (Action MagRoller / Action Roller Advance) Left: Outside/Outward Right: Outside/Outward 450mm Width Roller (Action MagRoller Wide / Action Roller Advance Wide) Left: Inside/Inward Right: Inside/Inward 415mm Width Roller (MoZ-Roller) Left: Inside/Outward Right: Outside/Outward