If you want lightweight performance

Waterproof vinyl membrane reinforced with a fibre weave

This needs to be used in conjunction with a Reverb Bleed Kit

so you can "upgrade" your SLX or XT 11 speed derailleur by adding Premium Grade XTR wheels if you like

Rockshox Lyrik B1+ and Yari A1+ Debonair Upgrade Kit - 2016+ - 120mm Out of Stock If you want lightweight performanceWhy buy a new fork when you can upgrade the one you have? The Rockshox DebonAir air spring upgrade kits will make your fork smoother and more responsive than ever before and provide you with increased traction for improved corner speed and all around confidence. Specifications: Suits Lyrik B1+ and Yari A1+ forks Solo air, DebonAir technology Weighs 59 grams 120mm RockShox Part: 00. 4019. 932. 006 Barcode: 710845816994 130mm RockShox Part: 00. 4019.