RockShox Judy Silver TK Boost ForkFeaturing 30mm straight wall steel upper tubes and magnesium lower legs, this mountain bike (MTB) suspension fork is a great choice of upgrade for riders that want superior durability without adding any unnecessary weight to their ride. Benefitting from Boost axle spacing and a range of ride-enhancing features such as a lightweight Solo Air air spring, external rebound adjust and a TurnKey (TK) Lockout, this model is ready for the fast and fun trail riding adventures.TurnkeyIf you happen to hit a big rock when you have your fork locked out, TurnKey’s patented blow-off design absorbs the unexpected hit instantly. When you think about it, it’s kind of noble.BoostBoost is the standard wheel and drivetrain specification that opens the opportunity for improved frame geometry with shorter chainstays, wider and stiffer suspension pivots, a wider range of chainring options, as well as more clearance for bigger tyres and wider, stiffer wheels.Features: Upper Stanchions Material: 30mm Straight Wall Steel Lower Legs Material: Magnesium Crown Material: Forged, pocketed Aluminium Use: Mountain Bike (MTB) Steerer Diameter: 1 1/8-1.5" tapered Axle Size: 15x110mm (Boost) Air Spring: Solo Air Damping: External Rebound, TurnKey (TK) Lockout Brake Type: Disc BrakeBuy RockShox Components from Chain Reaction Cycles, the World’s Largest Online Bike Store.