Cartridge type forks are found in most state-of-the-art sports bikes because they provide better handling characteristics as rod-type dampers and also offer more tuning possibilities. The specialists from Italian suspension manufacturer Bitubo have created these complete and easy to install fork extending cartridge kits. They raise the front of the bike to change the looks of the bike and increase ground clearance. The increase of the front fork length is adjustable from 40-50mm. Cartridge kits also have external 10-step adjustable spring preload, 20-step adjustable rebound damping and 20-step adjustable compression damping to fine-tune your front end to body weight and riding style.