The Cogster Fortiguard Alloy Mtb Bash Guard -A Iscg05 Bicycle, And Bmx Chain. Tooth Capacity : The Cogster Bike Chain Guard is designed to be compatible with 26T to 36T single (1X) chainrings, making it a versatile and reliable choice for protecting your chainring from damage during off-road riding. Mounting standard : This particular bash guard is specifically designed to fit frames with an ISCG 05 mount, making it a convenient and easy-to-install option for riders looking to add an extra layer of protection to their setup. Quality Production : This bash guard is precision CNC'd from 6061 aerospace alloy for a perfect fit on your frame. It's lightweight and easy to install, so you can get back out on the trails quickly. Solid Protection : The Cogster Bash Guard sits behind your chain ring to protect both the chain and chain ring from potential strikes to the bottom of the bike. With a weight of only 62g, you'll hardly even notice the Cogster Bash Guard is there. But you'll be glad it is when you take a nasty spill and your chain and chain ring are protected from damage.