QUALITY & DURABLE: The RACEWORK(since 2000) SROAD 11-28T lightweight 11 Speed road bike cassette is a game changer on the market.It's build with the same concept as SRAM Red,but more durable, lightweight than Shimano Dura ace, priced as Ultegra - Patent Product: RACEWORK worked with 13professor takes 10+ years, developed the XXT series parts with 13 patent applied from materials to the design. All product made by chrome molybdenum vanadium steel + aircraft level alloy. It's integrated One-Piece design even better than SRAM, much lighter and Durable than Shimano; - Compatibility: Shiftering smooth for Shimano DURA-ACE Di2(R9150) DURA-ACE(R9100) Ultegra Di2(R8050) Ultegra(R8000) 105(R7000),SRAM RED22 SRAM Force22 SRAM Force SRAM Rival, it won't work with Campagnolo; - Super lightweight: 11-12-13-14-15-17-19-21-23-25-28T (~160g) similar as SRAM Red, much lighter than Dura Ace R9100 11-28T (205g). It’s a standard HG-style, very easy to install and replace - Best Value: Currently we are running release sale which is similar as R8000 serise but in R9100/Red standard, you can't find such competitive quality product among the industry, let's save you a few hundred bucks; Pre order item 5-7 working days. _______________Follow Us_______________ ✔ https://mall.shopee.com.my/shop/#shopid=1156231 ✔ https://www.facebook.com/icebikeheaven/ ✔ http://www.11street.my/store/ibh ✔ http://www.lazada.com.my/ice-bike-heaven/ ✔ http://bicyclebuysell.com/user/IcelaacH _______________How to Order_______________ How to Order: 1.Product Name or Item number: 2.Quantity: 3.Color: 4.Name: 5.Address: 6.Contact number: Send to ☎ https://www.facebook.com/messages/icebikeheaven ☎ Whatsapp Wechat Sms 017-four20four398 _______________Buy from Us_______________ ♞100% Positive Feedbacks ♞Registered SSM - Icebikeheaven ♞Prompt response ♞Warranty ♞After Sale Service