Super Lightweight Fixie and Single speed bike mudguards

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Picture of Super Lightweight Fixie and Single speed bike mudguards
This instructable takes a huge chunk of inspiration from a pre existing lightweight rear mudguard that is already commercially available. I have adapted the design slightly and, in addition, created a small guard for the front wheel. 
These mudguards are small enough to keep in the bottom of your bag for whenever you may need them AND this whole instructable cost me only £1!!!
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Step 1: Find your material!

Picture of Find your material!
You need to find a suitable plastic material with which to build your mudguard. I considered using the thin plastic sheeting that document folders are constructed from however i decided it could end up being a little flimsy. I found this multi pack of flexible kitchen cutting boards in a super market for £3. The material that they are made from is flexible, strong and light. A single cutting board will be enough to make both front and rear mudguards. 

Step 2: Mark out the rear mudguard

Picture of Mark out the rear mudguard
I managed to source the outline of another popular lightweight mudguard and used this as a starting point. I lengthened the design slightly. The final stencil will be uploaded in the final step of this instructable. I used a Stanley knife to make the cuts although you can get away with using scissors. 

Step 3: Hole punch and score

Picture of Hole punch and score
I used a normal hole punch to make the holes and then realised that I should have just used a normal drill bit as the holes need to be quite a bit bigger. These holes will clip onto the underside of your saddle. 

I chose to score a line down the middle of the mudguard on the top side. This scored line will allow the plastic to flex upwards much like a conventional mudguard. 

Step 4: Mark out and cut the front mudguard

Picture of Mark out and cut the front mudguard
There should just be enough material left to create the front mudguard. I used a very similar design as the rear guard. As there isn't anywhere useful on the front forks to attach this one to you'll have to use a rubber band to strap it to the underside of the bike frame. 
Make two holes and link them with a single slit. The rubber band will loop through these holes and over the frame. 
hardenheavy made it!16 minutes ago

OK, so my creation clearly does not work. There's as much mud on it as under it. I think it a seat height thing but I can't change that. My version is even longer than the one in the instruction. Any ideas?

Homemade Ass-Saver.PNG
gedeh19 days ago

Thank you very much

Just found these clever designs and was thinking i might try printing a design on some light card, then laminating it... Well done folks!
Harvard826 months ago
Like the Andre the Giant sticker...
binarybug7 months ago

excellent idea! I built my fixie last Friday and as rain is forecasted for tomorrow I needed a mudguard solution urgently. I didn't have the right material, so I had to improvise a bit with plastic that isn't flexible enough (long live duck tape :)

can't wait to go to a local "dollar shop" and get some suitable plastic to make mudguards!

thanks for posting!

wadey19698 months ago

boss idea thanks

Olagio made it!10 months ago

Thank's a lot for this awesome idea)

Mr Chutney (author)  Olagio9 months ago

Hi Olagio!
Wow! Great to see your pictures! Thanks very much for sharing. The front mudguard attached to the shifters is genius!

Olagio Mr Chutney9 months ago

Thank you! I would never did it without your invention)

asssavers11 months ago

Hey, to make your DIY Ass Saver a little bit easier we would like to contribute with the template for cutting. It's a bit old but should work fine:

The material used is 0.8 mm Polypropylene and the easiest way to source it is to find one of those plastic A4 binders:


Ass Savers Team

Mr Chutney (author)  asssavers11 months ago

Ha Ha!
That's fantastic! I was almost certain that you'd be in touch at some point to ask me to take it down! I'll add the template and materials to the step by step guide ASAP. I'm sure all my fellow instructable members will be very grateful.
Many Thanks!

darrenhall1 year ago

Great instructable - long live La! Fixie!.

I just used an empty plastic Celebrations chocolate tub. It did say 'reuse me' on the side.
fincape1 year ago
Nice one, thanks!
blacky941 year ago
The design works great, thanks!

I tried it with the Drälla chopping boards from IKEA ( It worked great for the first few weeks, but at some point the platic just broke at two points because it was under constant tension. Now I made it out of a plastic file which has a much thinner plastic. Lets see how that works out!
Mr Chutney (author)  blacky941 year ago
Thats fantastic!
Always good to hear of people having some success. The plastic file is a great idea, I imagine that it's a better long term solution. The handy thing is that they only take seconds to make with a thinner material so it doesn't really matter even if they do brake! Winter is swiftly on its way so I will be making much more use of mine as well. Well Done!
gonzhi19611 year ago
This really works!!! Thanks for the idea!
gonzhi19611 year ago
It's rainy season now here in the Philippines...this idea is just what i have in mind! good thing it turned out I have some flexible kitchen cutting boards stored in our kitchen cabinet...I will post soon if the mudguards really work excited to start on this project!
Mr Chutney (author)  gonzhi19611 year ago
Can't wait to see how you get on with it. Best of luck with your build!
velochk1 year ago
Have you thought of using zip ties instead of rubber bands? Id prob keep mine on all the time cause it rains here too often. Great idea! Thanks!
Mr Chutney (author)  velochk1 year ago
Excellent suggestion, I like to remove mine but zip ties are fantastic for this sort of thing. Cheers!
Advar1 year ago
Oh, sweet snaparoni, soons I get home after my McDinner, I'ma gonna try this with some of the stiff ol' roof rubber I've got! Thanks :)
Mr Chutney (author)  Advar1 year ago
Excellent, post some pictures when you're finished!
GarGon1 year ago
excelente idea!
Mr Chutney (author)  GarGon1 year ago
Thank you very much GarGon!
ZaneEricB1 year ago
Well played. I love flexiboards, they are very versital !

Great i wish i hadnt sold my fixie :(
Mr Chutney (author)  ZaneEricB1 year ago
They are fantastic aren't they! I never worked with it before but it certainly did the job.
Mr Chutney (author) 1 year ago
Don't forget to vote for me in the 'Great Outdoors' and the 'BIkes and Wheels' contests!
Thank you