With all these improvements we made this year. You have to try our RCP2S. This new shock provide more delicate damping system to handle the small and big impact, it also makes this shock more durable. New Oil route improves the bouncing behavior to resist the shock on the roads. Weight: 0.41 KG ( 0.91 Ib ), 210 mm ( 8.27 inch ) Adjustments: Rebound/ Compression/ Preload/ Air Pressure Adjustable/Big impact Damper shaft: Hard chromed shock 12 mm ( 0.47 inch ) shaft. Dark hard-anodized: AL-7075 shock body. Riding style: AM / FR / DH Color: Black Available: Size Eye to Eye x Travel 190 脳 51 mm ( 7.48 脳 2.01 inch) 200 脳 56 mm ( 7.87 脳 2.20 inch) 210 脳 61 mm ( 8.27 脳 2.40 inch) 220 脳 66 mm ( 8.66 脳 2.60 inch) 240 脳 76 mm ( 8.74 脳 2.99 inch) 265 脳 85mm ( 10.43 脳3.34 inch)Customized Front Fork And Shock website:http://www.mdebike.com/electric-bike-accessories/front-fork-and-shock/