Zefal Deflector Fender Rear. Having a rear fender is great. It keeps your wheel from throwing half the trail in your buddy's face. But sometimes, having a front fender is not so great. Like when it's perfectly dry out. Which is why you should use the removable Zefal Deflector RM60 Mountain Bike fender. It's a rear fender made just for mountain bikes. It's compatible with pretty much any seat post out there, features a quick mounting system for easy on off, and is tough enough to tackle any trail. So the next time you don't feel like throwing some mud, slap the Zefal Deflector RM60 Mountain Bike fender on your ride and get on out there.