SwampDude

I decided to put fenders on my Trek 7.5FX since it will be my ride on rainy days. Much to my surprise, the best local bike shop (a large, well stocked store) had only two fender choices, and neither looked promising. One pair wouldn't work on the back of the Trek because I've got a rack to carry my camera stuff. The other was a German made plastic pair that seemed flimsy and came with no instructions of any kind. I bought the German back fender, but damn if I can figure out how to mount it.

What is a guy supposed to do? I'm riding in Indiana this Spring, and frequent rain is a fact of life here. It's either ride in the rain or stay home.

I'd love to get some suggestions, even guidance on making fenders. This should be a slam dunk project, but I'm coming up blank so far.

JanMM

Have you checked the website for the fender company? SKS, perhaps? mudguards - SKS Germany

Is there limited clearance between the rack and the tire?

I use Planet Bike fenders - black plastic - ordered from PB. Unlike many bike shops, no lack of selection.

Retro Grouch 

I'm not going to offer you much help except to say that mounting fenders is one of the things that can sometimes be a slam dunk but oftentimes is not. Essentially you are trying to force fit a product designed by one manufacturer onto a product that was designed by somebody else. AND THERE IS NO UNIVERSAL FIT. Some bikes just don't have enough tire to frame clearance to install fenders. In your case the project is also complicated by the fact that you've already got another accessory bolted in the general area that the fender has to fit into. That was designed by yet a third company.

That's not to say it's impossible in your case. In fact, since you already have a rear rack installed, I'm betting that your bike has dropout eyelets and that it's possible to make fenders fit. Here's what I would do:
1. Since your rear rack has to fit above your fenders, I'd take that completely off first. Then I'd see how much trouble I had installing a set of SKS or Planet Bike fenders. I'm partial to Planet Bike because they come in a variety of widths and they have outstanding customer service for aftermarket replacement parts. Chances are, without the rack on a bike with dropout eyelets, it'll be a routine install.
2. Finally I'd go to work on the rear rack. My bet is that it isn't going to fit over your fender. The good news is there are rear racks that either have longer support legs or even adjustable support legs that can be installed high enough to fit over your fender. In other words, you may find yourself buying a different rear rack. Sorry.

Looigi

SKS Raceblade LONG. Fit just about any road/race bike and almost as good as full fenders.

https://www.google.com/search?q=SKS+Raceblade+LONG

Stolencar

This is where I am as well. I cursed for twenty minutes trying to squeeze the rack and fenders onto the same eyelet & came to the conclusion that it wasn't going to work. Off to buy a new rack this afternoon. Without the rack the Planet Bike fenders were still a pain in the butt to install but I got it done. I am worried still that I will need to tinker with the fenders all the time as they go in and out of alignment. I'll put that down as the cost not washing my jacket after every dirty wet commute.

fietsbob

Some folks are less mechanical problem solvers than others ..

I am not a gourmet Cook or a Post graduate degree alumni ..



the folks at the LBS here are OK at fitting Mudguards to bikes . Coastal Oregon Needs them fitted.

you cannot bring it by, so I can physically help.

Altair 4

You might just need to buy a longer bolt to make both fit on the same eyelet. Your LBS might have what you need, but I bought longer bolts (stainless steel) from a local Ace hardware store. Lowe's or Home Depot might even have what you need.

In my case, the store had some bolts that were a little too long, so I just used a dremel cut-off to trim the length to fit my needs.