The Wolf Tooth Giant Cog Is The Ultimate Upgrade For 1x Setups – Extending Your Cassette\'s Bottom Gear And Unlocking A Whole New Level Of Climbing Potential. Whether You\'re A Trail Shredder, Gravel Grinder Or Altitude Addict, This Cog Will Keep You Riding Even On The Toughest Climbs.Simply Replacing Your Existing Stock Sprocket On Shimano 10-speed Cassettes, This Gc Is The Result Of Endless Testing And Refinement By Wolf Tooth\'s Master Engineers And Riders. With Multiple Colour Options, You Have The Option To Add Some Additional Flair To Your Ride.