Topeak DeFender XC11 27.5" Rear Mudguard

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Product Description

The lightweight and removable Topeak DeFender XC11 rear mudguard offers great mud and spray protection. This 27.5" MTB specific mudguard allows for easy fender adjustment giving you the best fit. 

Ideal for multi-bike riders is a quick release clamp that adjusts to fit ø25.4mm - ø34.9mm seatposts. Advanced high impact plastic is co-molded to a flexible trailing edge for resistance to impacts.The underside of the Topeak DeFender is polished to help shed mud, and it also helps when cleaning. 

Key Features


  • Slip Joint Clamp Fits ø25.4 - ø34.9 mm Seatposts


  •  Multiple Angles Adjustable


  • Two Tone Injected High Impact Resistant Plastic

Added Features

  •  Highly Polished Underside


  • (L x W x H) 62 x 10.2 x 7 cm
  • 24.4" x 4" x 2.8"


  •  215 g / 7.57 oz

Occasionally, without notice, manufacturers change product design and/or specifications.

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Rear Mudguard Guide


Rear Mudguard Guide

Why use mudguards?

A rear bike mudguard can make a huge difference in the quality of your ride. Keeping the water and mud away from you and your bike will keep you warm and comfortable while protecting your bike from grit and cutting down maintenance. Luckily there are many types available to fit every style of bike.

While full-length mudguard sets are the prefered option for road and hybrid commuters, leisure cyclists and mountain bikers have a few different options for rear mudguards. Front mudguards are also available for all types of hybrid, gravel and MTB's

What type of rear mudguard will fit my bike?

A full-length mudguard will give the most protection, but the traditional style needs attachment points on the frame and forks. This style is suited to recreational road and hybrid bikes. For more information, please see our mudguard guide.

If your bike doesn't have the mounting points for a full-length mudguard set, there are still plenty of other options available.

Full-length mudguards require mounting points Full-length mudguards require mounting points
MTB rear mudguard MTB rear mudguard

Frame mounted rear mudguards

Mountain bikes, especially full-suspension frames, will not have any mounting points and eyelets for traditional full-length mudguards. A traditional mudguard is not very good off-road as they rattle on and rub on rough terrain. Luckily, there are rear mudguards that securely attach to the frame using zip-ties or Velcro strips.

This style is the most effective at keeping the crud away. The closer the mudguard to the tyre, the less chance any mud or water can escape and cover your body and bike. Once mounted tightly this style is solid and is the best for mountain bikers.

Frame mounted rear mudguards

Seatpost mounted rear mudguards

A rear mudguard mounted to the seatpost is secure and effective. A universal design that uses a clamp to mount around the seatpost. There are a few different designs but all work in a very similar way. The closer the mudguard can be to the tyre, the more effective it is at stopping the spray from being thrown up by the back wheel.

This is a universal design, so long as your bike has a saddle height higher than the top of the back wheel and there is some exposed seatpost for the clamp then this type of rear guard will fit. A frame-mounted type will be best for mountain bikers who ride rough terrain, but for the majority of leisure cyclists, a seatpost mounted mudguard will be effective and easy to install.

Seatpost mounted rear mudguards

Saddle mounted mudguards

While not as effective as a frame or saddle mounted mudguard, a simple saddle mounted mudguard has many advantages. Very easy to install, this type of mudguard fits between the saddle and the seat clamp. It slots neatly around the saddle rails with a folding design to lock into place. You will need a traditional saddle that has two parallel rails to fit this type of mudguard.

There are wider versions to give more protection and narrower options for those with thin road bike tyres. This design, though slight, will keep the worst of the spray away from your saddle and bottom. They are very light, not expensive, quick to install and very modest when riding. You will barely notice a simple rear saddle mounted mudguard.

Saddle mounted mudguards


Mountain biking in the mud with a mudguard

While perhaps not the best visual addition to your bike, a rear mudguard is the best way to keep your back and bottom dry through the rain and mud.

Mountain bikers now have a good, rattle-free solution with a frame-mounted mudguard. Leisure cyclists on bikes with no eyelets or mounting points can benefit from a seatpost mounted guard, while road riders and those who want the most inconspicuous and light option will enjoy the dry feeling thanks to a saddle mounted mudguard.

Delivery & Guarantee

UK Delivery Information

International Deliveries – Temporarily Suspended 11/11/20

Note: We are still offering deliveries to the Isle of Man, Scottish Highlands, Scottish Islands, Channel Islands, Isle of Wight, Jersey and Guernsey. 

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Please keep checking the TNT tracking for further updates. On behalf of TNT we apologise for any delay and inconvenience this may cause. 

We are committed to offering fast and free delivery, whether you're ordering bikes, accessories or clothing. Our standard delivery service is FREE in the UK, regardless of the size and on all orders over £20.

Please note that bulky products and bikes shipped to outlying UK regions are excluded from free shipping.

Please note that Pre-Order dates can sometimes change due to updated stock information.

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Returns & Warranty

It's easy to return a product with our 365 day, hassle free returns. 

We will give you a full refund on any item that is returned to us unused/unfitted, in a resaleable condition and in its original packaging (where possible).

Please note: For hygiene reasons, we cannot accept returns of facemasks, undershorts or underwear if the item has been removed/unsealed from its original packaging.

If your item develops a fault or arrives damaged, please contact us first so we can resolve the issue for you as quickly as possible.

For more information please visit our Returns & Warranty page.