Fat Bike Fenders Review

Updated on August 18, 2022

A fat bike is defined by its large tyres. Those massive chunks of rubber not only provide excellent grip and cushioning, but they also serve as magnets for road grime. Many tyre manufacturers claim that their fat bike tyres “shed mud” with ease. So long as you don’t mind your front tyre getting caked in dirt, this is great for keeping your tyres light. However, as soon as you start moving, you’ll be doused in mud and sprayed by your back tyre. Using the best fat bike fenders is the best way of preventing this from occurring.

Fat Bike Fenders Review

  • MATERIALPlastic
  • WEIGHT42g (front) 45g (rear)
  • FENDER TYPESeparate
  • Extra Wide To Cover Fat Tires
  • Rear Fender Attaches To Saddle Rails For Easy Installation
  • Pre-Molded Bend Points Allow Width Adjustment

2. Portland Design Works Mud Shovel

  • Length: 8.8-inch front) & 22.5-inch (rear)
  • Width: 5.5-inch (front & rear)
  • Weight: 5.64oz (front) & 5.6oz (rear)
  • Material: Polymer
  • Type: rear seat post & front downtube

These front and rear mudguards from Portland Design Works catch a lot of mud when purchased as a set. Like the top-rated SKS-Germany Fenders, these fenders have comparable attachments.

Abrasion on the trails or in the snow will have no effect on the long-lasting polymer.


  • Fenders are quick and simple to put on your fat bike, and they can be left behind when the sun shines.
  • Strong plastic is engineered to endure years of punishment from fat bikes. Built to last.
  • MATERIALPlastic
  • LENGTH24.5” (Front), 22.5” (Rear)
  • WIDTH8” (Front), 6” (Rear)
  • FENDER TYPESeparate
  • Extra Long And Wide To Fit Any Fat Bike
  • Front Fender Mounts To Down Tube With Secure Straps
  • Rear Fender Mounts In Seconds To Any Seatpost


This rain- and bicycle-prone city has a company called Portland Design Works that specialises in making rain gear. With enough breadth and length to block even the largest tyres from spray and debris, these fenders aren’t just massive, they’re enormous. The fact that they are quick and simple to put on and take off means that you may use the same set of fenders on multiple bikes. For those who don’t mind a noticeable accessory on their bicycle, this is the fender for them.

Because of their size, these fenders have both advantages and disadvantages. If you’re seeking for streamlined, unobtrusive accessories and don’t ride in a lot of muck, these may be a bit much for you.

4. Planet Bike Big Buck Board

  • Length: 29.5-inch (front) & 22.9-inch (rear)
  • Width: 4.52-inch (front) & 5.5-inch (rear)
  • Weight: 6.4oz (front) & 7.2oz (rear)
  • Material: Polypropylene
  • Type: rear seat post & front steerer tube

Front and rear fenders from Planet Bike, the Big Buck, provide excellent coverage and are designed to withstand heavy mud spray. In particular, the front fender provides more protection than ordinary downtube mudguards since it covers more of the wheel’s front end.

Most fat bike mudguards have a glaring omission in this area, and you’ll be delighted to have it covered on the muddy trails and snowy highways of winter.

The blades are composed of polypropylene, which is extremely durable and can withstand even the roughest of winter commutes.

The front fender can be mounted to the steerer tube using the provided fittings, and it is very secure once it is in place. Attaching the rear fender couldn’t be easier thanks to the quick-release mechanism that keeps it attached to the seatpost.


  • The front fender extends further forward than a typical mudguard to provide greater protection for the front wheel.
  • Easy to Install – Attaches to the bottom of the steerer post with simple to install fasteners. Securing
  • 5-inch wide tyres will fit perfectly on these extra-wide rims.

5. Axiom Rearrunner & Frontrunner

  • Length: 16.65-inch (front) & 27-inch (rear)
  • Width: 7.85-inch (front) & 8-inch (rear)
  • Weight: 4oz (front) & 8.8oz (rear)
  • Material: Polypropylene
  • Type: rear seat post & front downtube

There is a lot of debris and muck flying around, and the Axiom Rearrunner and Frontrunner are wide enough to collect much of it.

Quick and easy installation with no need for any tools. An easy-to-install mount makes it possible to add or remove the fenders based on the rider’s preference. For further protection and peace of mind, the fender is held in place by the seatpost’s Boa-style clasp.

It is possible to hand-form the rear fender to precisely fit your set-up and provide optimal mud-catching performance.


  • You’d have to be extremely unfortunate to receive a face-full of mud if you connected these to your fat bike.
  • Install the mounts, slap on the fenders, and go biking in no time. No tools required.
  • It’s easy to remove the fenders from the mounts while it’s raining.

Types Of Fat Bike Fenders

Full Fenders

Full fenders follow the perimeter of the front and rear wheels and sit near to the tyres to provide great protection from the elements. Fat bikes are less likely than winter-proofed road bikes to use this style of fender.

Because fat bike frames typically have a smaller number of attachment points, this is a major factor in this. The extra-wide tyres would make them bulky and cumbersome.

Fat bike fenders don’t fit as tightly around the tyres, but they still protect the rider from flying muck. Rear fenders on fat bikes often attach to the seatpost through a quick-release mechanism rather than frame mounts.

Crud Catchers

Crud catchers are a new generation of simple, easy-to-attach fenders that are meant to shield the rider from the most intense spray.

It is a single piece of strong plastic that slides under the saddle rails and is held in place by two notches in the plastic. A wonderful alternative for riders who only use fenders on occasion and don’t want to deal with the trouble of removing them each time they do so.

Fat Fender Features To Look Out For

Fender Width

A variety of fenders are available, but if you want to keep dry and clean while riding a fat bike, you’ll need to pay more care.

In order to ensure that your tyres and fenders don’t overlap, the fender’s width should be greater than your tire’s width.

Your fat bike frame may need to be widened to fit a wider fender depending on the design. When the front wheel is moving side-to-to-side during steering, the extra width at this point will help the fender catch mud.


Mounts integrated into the bike frame are typically used to attach standard bike fenders. It’s rather uncommon for fat bike frames to lack mounting points, therefore fenders must be fastened in a different way.

The rear fender is typically attached to the seatpost using a quick-release mechanism. Several pivot points will be included in the mounting system to help achieve the ideal mounting angle while yet leaving adequate space between the tyre and fender.

Strong Velcro straps secure the front mudguard to the downtube.

A two-second job for even the most unskilled of bike technicians, installation is all it takes in either case to get the system up and running.

Fenders and mudguards can be removed with equal ease when the weather improves, saving you from having to haul about the extra weight.

When you use these attachments, your fenders will stay in position no matter how bumpy the trail is.

Some mudguards, like the Mucky Nutz, are cable tie-attached or simply fit into the saddle rails at the low end of the price spectrum. They are easy to use, but on difficult trails, they can come apart.


It’s critical to have enough space above the tyre when running rear fenders. As a rule of thumb, you should leave at least a half-inch of space on either side of each tyre between the tyre and fender, but this can be dangerous in very sticky conditions.

Due to the seatpost attachment, this is less of an issue with fat bike fenders and mudguards, but it is something to keep an eye on. Unless the mud is especially sticky like clay, you may want to do away with the fenders entirely if you don’t want to crash.


Any fender that you connect to a fat bike should be able to withstand the same level of abuse that fat bikes are built to handle.

As long as they’re composed of durable plastic, they can take the brunt of any crash and come out unscathed from it.

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