Ask a Mechanic: Installing a Marsh Guard Fender on a Mountain Bike

Trevor says, “ I’ve seen a few people with marsh guards on the trail lately, what do you think of them and can you show how they’re put on?”

With the winter months upon us, rain and poor conditions are something we all have to deal with on our rides. Fortunately, there are low cost/low effort ways to make wet rides much more bearable, such as the addition of a Marsh Guard.

The Marsh Guard is a simple, lightweight fender that mounts directly to the lowers of your fork. There is also the Stash which extends the fender forward for additional protection, but can also be used to protect rear linkages on full suspension bikes. There isn’t a specific guide for rear application, but with some trimming and a little ingenuity you’ll be able to come up with something.

All you need to apply the Marsh Guard is four zip ties and some scissors or other cutting tool. Remove the front wheel and clean up the fork so you’re mounting the fender to a clean surface. This will help prevent any abrasion from debris captured under the zip ties and Marsh Guard when it’s attached. There are two zip ties that attach to the top of the fork lower arch, and one zip tie one on each fork leg. I start by loosely placing all the zip ties around their respective areas of attachment. Once the Marsh Guard is loosely secured, check to make sure it is centered and then secure the zip ties. That’s all there is to it. Cut the excess off the zip ties and get back out on the trail.

If you’re going to use the Stash or another Marsh Guard to protect linkage on your full suspension bike, the application process will differ depending on your bike. This is how I used one to protect the lower link on a VPP suspension bike and has been very effective for me. I had to trim it to fit and get a little creative with the zip ties to secure it, but it was worth the time and effort. Cost is very minimal so it’s worth a shot even if you mess up. Just make sure it won’t interfere with the rear wheel or restrict movement of the linkage in any way.

Happy trails!