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Btwin Flash, Road Bike Saddle Mudguard

Sale price: $3.00 Regular price: $4.99

A light, ultra-compact mudguard that easily attaches underneath the saddle. It protects the tops of the thighs from splashes thrown up by the rear wheel

Color: Select a color
Size: Select a size
Sale price: $3.00 Regular price: $4.99

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San Francisco, 735 Market St. Options

Select an available color and size to see options.

Model: 8327786

Product Videos

Product Features

A photo of the Btwin Flash, Road Bike Saddle Mudguard in use

Btwin Flash, Road Bike Saddle Mudguard | We've designed this mudguard to protect the tops of your thighs from mud splashes when cycling.

A light, ultra-compact mudguard that easily attaches underneath the saddle. It protects the tops of the thighs from splashes thrown up by the rear wheel


Protects the tops of the thighs from splashes from the rear wheel

Easy assembly/dismantling

Installs onto the saddle of the bike using a clamp lock


Fits the vast majority of road bike saddles with 2 rails.

Compact design

Easy to carry anywhere, flat as a sheet of paper.

Product Customer Reviews

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Btwin Flash, Road Bike Saddle Mudguard,black
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Awesome fender

What a brilliant idea! Installs fast, no fastener or strap needed. Light weight, keeps the road dirt off your back. Even looks cool the way it attaches to the saddle. I have one for my mtb too.

Simple, cheap and reasonably effective

Purchased this to hopefully stop my backside getting soaked without fitting mudguards and after first run in wet conditions all good , slight spatter on top of of my back , but that is to be expected. I was also still able to fit my saddle bag .

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Simple and easy to fit.

Does the job, looks good and is good value.

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Beware Saddlebags Preventing Fitting

Disappointed. Have just purchased two of these mudguards and tried fitting to two bikes (road & MTB) with different types of saddle with small saddlebags fitted underneath, and mudguard will not fit on any with saddlebag fitted. Now have the situation where it's either fit saddlebag or fit mudguard. Cannot fit both at the same time. Take note before purchase. As I cannot fit guard (hence 1 star), I can't comment on how good or bad it is at giving protection. I am now in the situation where I have mudguards that don't fit and it will cost more in fuel to return than initial cost. I feel a bit of bodging coming up to get them to fit.

Does the job

Cheap, easy to install and keeps the main spray off your back. If it's raining you'll still get a soggy behind though!

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Splash appeal

Fitted it to my new Gravel bike. Brilliant. Easy to fit.

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Simple enough to fit.

Bought this to fit on my young son's bike. He's not been out in the rain yet so can't comment on how it works. Athough this is just a piece of plastic, it's a very fair price compared to other rear mudguards. I have a similar one which is wider at the end and squarer, appreciate the ease it can be removed if needed and the small amount of space it takes up. Bought this one for his bike because it's slightly smaller (smaller looking anyway) but hope it stops the splashes up his back being that it is thinner at the end.

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its good but mine fell

the item worked really good but then i noticed it had fell off. need to get another as the item did keep my butt dry

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Value for money

Value for money

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Very easy to install and remove

Versatile and practical

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cheap but perfect

does it's job well

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Rain saver

Purchased as a it was better than nothing option after learning of heavy downpours due for the ride back to the ferry. That rain came and whilst I was soaked from the front wheel combined with wearing a rain coat my back and bottom was dry with no sign of rain marks on the coat, the mudguard worked far better than I expected would certainly recommend, bike was a standard racing bike with 28 mm tyres.

Simple is best

I love these. So simple, but great at keeping a dry rear end without breaking the bank or having a lot of hassle fixing mudguards.

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Flash Guard

Great wee additional kit to help staying dry on light rain rides

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Additional Product Information



  • 100% Polypropylene


These new, ultra-compact and ultralight mudguards can be taken with you anywhere. They stop cycling shorts getting soaked at the buttocks and lower back, but do not protect your entire legs or back. The ideal companion for setting out to ride in changeable weather.



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