UPC 731236986478

• BEST CONVERSION Bring you to the 1 9speed experience with lower cost. Whatever you can ditch your double or triple speed parts and convert the earlier type 30 and 20 speed bikes to 1X. Shifting will be much easy and simple to your loved ones, and it saved weight.
• FREE EXTENDER Most of 9 speed standard splined freehub body which share the same spline set up are compatible for the 40T convert, the free JGbike 22mm link extender to ensure your stock rear derailleur support this setup.
• WISE UPGRADE Lower cost to replace or upgrade your stock 11-32T; 11-34T; 11-36T cassette; 11-13-15-18--21-24-28-34-40, work for 1x9, 2x9, 3x9 setup. The wide ratio technique was introduced by Sunrace at the very first stage, it's the market leader brand across USA and Europe;
• BEST CHOICE Weight saving, Cheap, Reliable, Light, Great looks, Smooth shifting by gearing setup, made by hardened steel; average weight 425g made in Taiwan , not the cheap brand made in China, driven components matter of your SAFE riding;
• 1-YEAR WARRANTY GREAT QUALITY - BEST PRICE - TRUST SERVICE

Package Details, - Sunrace CSM990 9AX 11-40T MTB Cassette 1, - Product menu 1, - JGbike branded 22mm rear derailleur link, hanger extender 1, - New in retail package, Product Feature & QAs, Q: What cassette or rear derailleur is it compatible with ? A: It's designed for 9 speed MTB driven system, compatible with most of 9 speed cassette or driven system including Shimano & Sram, Q: Is it work for 1x9, 20 speed or 30 speed? A: Yes, Sunrace better gear ratios than Shimano at the same weight, the only one design which is compatible with 1x9, 2x9 or 3x9 speed as long as a longer chain; Q: Do I need to replace my rear derailleur, Chain or buy long B-screw? A: It comes with a free 22mm hanger extender to lower your rear derailleur to release large cog for even short and medium cage, you don't need buy B-screw or other adapter, probably you need a longer chain if you use less than 114 link, Q: What's the gearing advantage? A: 3 Sprockets on 2 Spider Carriers, Sprocket 1st 9th: Hi-Tensile Steel, Light Weight Holes: YES, Q: What are the specific cassette it can replace? A: Generally all 9 speed MTB cassette including Shimano Alivio, 9-Speed XT, SRAM. x5, x7