Chain Devices And Bash Rings – There is nothing more frustrating than hitting the off-road descent only to find your chain has come off as you attempt the lung-busting climb up the other side…as the distraction makes you plough your brand new XTR Chainset into a rock. Still, you can learn from our mistakes and get yourself a chain device and bash guard. And if you’re a tarmac junkie, you’ll find that with the advent of 10-speed cassettes and double and single chain rings, it’s now even easier to lose your chain too. How do they work? Well, the chain device helps guide the chain smoothly onto the chain ring, keeping it secure and in place, while the bash guard protects the teeth from grinding or impacting on rocky surfaces.