Rear Mudguard Fender For BMW R1300GS - 2025 to 2027

The rear fender extender is a bolt-on mudguard extension that mounts beneath the factory rear fender on the BMW R1300GS and R1300GS Adventure, lengthening the coverage arc of the stock mudguard to reduce the volume of water, mud, and road debris thrown rearward by the rear tire. It is a straightforward, functional addition aimed at riders who use their bike in wet or mixed-surface conditions where the stock setup falls short.

The factory rear fender on the R1300GS is shaped around a balance of weight, airflow, and visual proportion — priorities that do not always align with maximum spray containment. Under genuine wet or unpaved conditions, the stock mudguard leaves a meaningful gap in coverage below the tire exit point. The fender extender fills that gap by adding a downward extension that redirects the spray arc before it reaches the components directly behind and below the rear wheel.

What the Factory Fender Misses

Without an extender, the surfaces that receive the most direct contamination from the rear tire include the rear shock body, the swingarm pivot area, the exhaust downpipe and heat shield, the license plate and its mounting bracket, and any rider following closely on a group tour. On paved roads in light rain this may be a minor inconvenience, but on gravel, forest tracks, or wet tarmac with standing water the volume of material thrown back is considerable.

The accumulation of mud and debris on moving and sealed mechanical components is not purely cosmetic. Abrasive particulate that works into the swingarm pivot bearings, shock linkage seals, and exhaust mounting points accelerates wear over time — particularly on a bike that sees regular mixed-surface use. Keeping those areas cleaner between service intervals is a practical maintenance consideration, not just a cleanliness preference.

Fitment — BMW R1300GS (2025+)

This extender is designed specifically for the BMW R1300GS and BMW R1300GS Adventure from the 2025 model year onward. It clips directly to the underside of the factory rear fender using the existing mounting points, with no drilling, cutting, or modification to the original mudguard required. If you are fitting other protective accessories to your machine at the same time, you can browse the full range in our BMW GS parts and accessories collection.

Installation

The extender attaches to the underside of the factory rear fender using the supplied clips and hardware, which locate onto the existing fender structure without requiring any permanent alteration to the bike. The process takes under ten minutes with basic hand tools and is fully reversible — the stock configuration can be restored in the same amount of time if needed. No adhesives, no drilling, and no specialist knowledge is required.

Frequently Asked Questions

Will it affect the ground clearance or off-road capability?

The extender projects downward from the underside of the rear fender and does not extend beyond the lowest point of the existing mudguard assembly in any direction that would affect ground clearance in normal off-road riding. It is positioned within the existing profile of the rear end and does not create a new low point on the bike.

Does it fit the R1300GS Adventure as well as the standard R1300GS?

Yes. This extender is compatible with both the standard R1300GS and the R1300GS Adventure from 2025 onward. Both models share the same rear fender mounting arrangement, and the supplied hardware fits both variants without modification.

Will it prevent mud buildup on the rear shock?

The extender significantly reduces the volume of spray and debris directed at the rear shock, swingarm, and exhaust compared to the stock fender, but it is not a sealed enclosure and should not be described as eliminating contamination entirely. Riders in extremely muddy conditions will still want to clean those components regularly — the extender makes that task less frequent and less intensive.

Free shipping on every order in the US. Every part is covered by a 1-year warranty and can be returned within 30 days of receipt.