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Rockrider Flash Mountain Bike Rear Mudguard

Sale price: $3.99 Regular price:

This compact, lightweight mudguard protects your lower back from tire spray coming off the rear wheel. It is detachable, and easily attached or removed.

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Sale price: $3.99 Regular price:

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San Francisco, 735 Market St. Options

Select an available color and size to see options.

Model: 8327783

Product Features

A photo of the Rockrider Flash Mountain Bike Rear Mudguard in use

Rockrider Flash Mountain Bike Rear Mudguard is designed for This mudguard is designed to protect you from mud, water, and debris kicked up by your MTB's rear wheel.

This compact, lightweight mudguard protects your lower back from tire spray coming off the rear wheel. It is detachable, and easily attached or removed.


It protects the buttocks and lower back from tire spray.

Easy assembly/dismantling

Attaches or detaches under the saddle in one step.


Handy: it fits practically all mountain bike saddles.

Compact design

It can be carried anywhere easily, in a bag or a pocket.

Product Customer Reviews

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831 Reviews
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Rockrider Flash Mountain Bike Rear Mudguard,black
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Cheap mudguard

Does the job but although I’ve installed it according Decathlon’s instructions on a Decathlon bike, it keeps turning sideways which doesn’t look cool. But it has saved my backside in the recent rains though.

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Value for money

Value for money

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Good product

Very good

Dry bum

Make sure you get the wider version if you have a Mountain Bike

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Great service from the bike sales

Bought as a package while purchasing a MTB. Needed something for a full sus MTB, does the job

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Rear mudguard

Its not raining yet so not sure as it is a bit unsteady

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Mud Guard

Is ok a little flimsy and could be a little stiffer. But good value and keeps your bum from getting wet.

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mud stopper

Great price easy to fix on

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Great idea but slightly flawed

A great idea, the addition of the zip-tie being a very good variation on other similar products. The only issue that I've found - when fitted it obscures the rear light, my lights are on the seat post of my bike and the mudguard covers them. This may be the shape of my bike / position of my lights / saddle etc, but worth pointing out.

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Does what it's meant to do! And cheap as chips

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mudgaurd review

These are £2.50 !! for the money there brilliant.. I recommend you get 2 of the front ones and fit a front one to the back just above the rear tyre.It works perfect and if you match this with a ass saver you cant go wrong for budget Mud protection.

Serves the purpose.

Bought one of these online, got it for 49 bucks which was the best thing . I will say this is a good product it keeps the water from splashing on your back while riding the bike at at high speed. However it doesn't look very pretty on a hybrid or Roadbikes (700c) , but it's super easy to install and uninstall and storage is the best part as it can get completely flat and can be stored anywhere. The plastic Quality is way better then it looks online. The Zip tie belts given to secure the mud flaps is excellent coz u can unlock it when needed it can surely stay in place even on trials and mountain biking. The best part is it won't break in case of an crash . It will just flex . Highly recommended product.

Very Nice Temporary Mudguard

I have been using this Mudguard on my roadbike. It was on sale and got it for just Rs.49.00. I found it to be very effective and reduced spray from rear wheel . It is strong enough. May not stand rigors of hard MTB off roading.

Useless and very poor quality

From protection and coverage stand point, its a good product, From quality perspective, its a third class product. Just lasted one ride and it broke. Utterly useless product.


Thank you, for taking the time to give us your review.  Apologies, for the bad experience you have had with the product. All our products have 2 years warranty. You can return the product to the store and ask for a refund. Since we received similar reviews for the product we have discontinued the mudguard. 

Deepak Babu E-sport manager DECATHLON

Můžu určitě doporučit.

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Additional Product Information


Main fabric

  • 100% Polypropylene

Keep your buttocks and back protected from dirt!

These ultra-compact and ultra-lightweight mudguards can be taken everywhere and will protect your buttocks and back from rain and mud splashes. But be aware that you will always get dirty when mountain biking in wet and muddy conditions. You can never escape it entirely.



Storage instructions

Store flat.

Care instructions

Can be washed with water.

Superior quality. Unbeatable prices.

For 40 years, Decathlon has delivered the best value in the retail sports industry by offering high-quality, sustainable and cost-effective products.

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Size Guide Visual