e13 Cassette Range Extender Cog

1x Drivechains are everywhere you look this season from complete bikes to winning enduro rigs. Everyone is doing it so why should you have to miss out? With the e*13 EX Cog range extender you don't have to. Simply fit this sprocket to your existing 10 spd cassette, using the clear instructions provided, and say goodbye to your front shift setup.

Here are the basics:

• It's an add-on cog to extend gear range of 10 spd. Shimano and SRAM cassettes
• It comes in 40t and 42t for use with Shimano cassettes and a 42t only for use with SRAM cassettes
• Installing your EX Cog is easy. Remove the 15t or 17t cog from your cassette & place the EX Cog on your freehub, then install your existing cassette back in place (complete instructions here)
• Each EX Cog is timed and ramped specific toShimano and SRAM cassettes
• The EX Cog comes with a longer steel replacement, B-limit screw for your derailleurs. Your current one won't be long enough to get the best shifting up to the new cog
• Available in Black, Red, and Blue