Please Watch The Video In The Listing For How To Choose And Install The Shock. FEATURES: This DNM shock features: Adjustments rebound , air pressure adjustable and lockout (Please note: The shock could NOT be completely locked.) Damper shaft: Dark hard-anodized AL-7075, Ø 10 mm (0.39 inch). Shock Body: Dark hard-anodized AL-6061. Riding style XC /TRAIL, Available size: Eye to eye x travel 165 x 35 mm ( 6.50 x 1.38 inch) 190 x 50 mm ( 7.83 x 1.97 inch) 200 × 55 mm ( 7.87 × 2.17 inch) Weight: 0.4 KG(0.88 Ib) for 165 mm Length.EXTRA BUSHINGS INCLUDED: Top bushing size: 8mm x 24mm; bottom bushing size: 8mm x 24mm and extra bushing 8mm x 50mm length. We have included an additional set of bushings for easier installation, please see 2nd picture. QUALITY: Air shock is much lighter than coil shock. This is a great upgrade from the old shock. It is precisely CNC machined to ensure no air or oil leaking.BAROMETRIC RECOMMENDATION; Weight 120 lbs - Main air chamber 90 Psi, Negative air chamber 50 Psi. Weight 140 lbs - Main air chamber 105 Psi, Negative air chamber 50 Psi. Weight 160 lbs - Main air chamber 120 Psi, Negative air chamber 55 Psi. Weight 180 lbs - Main air chamber 135 Psi, Negative air chamber 65 Psi. Weight 200 lbs - Main air chamber 150 Psi, Negative air chamber 70 Psi. Weight 220 lbs - Main air chamber 165 Psi, Negative air chamber 75 Psi. Lock Out Using lock out feature when you are riding on flat road. Please note: "Lock Out" does NOT mean completely solid. A Set Of Bushings You need to modify (Cut) the bushings to fit your bike. Performance The bike will be lighter and looks beautiful with air shock installed. DV22AR DV-22 AO-38RL-P Shock Type Coil Coil Air Rebound Adjustment ✓ X ✓ AO-38RC AO42AR AOY-30RC Shock Type Air Air Air Rebound Adjustment ✓ ✓ ✓ BICYCLE EXPERTS We design and develop premium bicycle parts and accessories. WIDE SELECTION With more than 2000 high quality and best value products, you will always find what you need. QUALITY PRODUCTS All the products we stock are carefully selected from the factories in the cycling industry. PRODUCT VIDEOS Our team is working hard on adding videos to all the products we are selling. We want to give our customers a visual image of the products and show you how to use the product before purchasing it.