Material: The Spike 33 Lock-On grips are constructed from Kraton rubber

making the inevitable mishaps less (financially) painful

plus they are available in a bunch of cool Mottled/Grunge anodized finishes

These are a slip-on pad that will stay put and save your skin if (when) you crash

Tannus Armour Tyre Insert - 2.0-2.5 Inch - 24 Inch Images Uploaded - Ready for Review Material: The Spike 33 Lock-OnThe Tannus Armour Tyre Insert is the ideal solution if you are running tubes and want some bomber puncture protection as well as increased ride quality. Who's this item for: DH, Enduro, and Trail bike riders running tubes who are hard on tyres and get lots of flats! Tubes Tubeless: This system has been designed to be used with tubes. Tannus recommends these sized tubes with their inserts: 2. 0 2. 5" insert: 1. 75 2. 1 tube 2. 6 3. 0" insert: 2. 0" 2.