Ass Saver Big


Our wide saddle mudguard for maximum butt protection. Suitable for gravel or MTB tires up to 55 mm. Tool-free setup in no-time!

  • Easy to fit, requires no tools
  • New patented FLIP-TIP™ attachment system
  • Fits every standard rail saddle, also with carbon rails
  • Suitable for tire widths between 30-50 mm
  • Great for gravel

Designed especially for wide tires, the Ass Savers Big is here to protect you from mud and dirt all day long. Use it with your MTB, gravel bike or your daily commuter, it doesn't care!

The new FLIP-TIP™ lock mechanism will ensure that your Ass Saver Big will stay put no matter how rough roads you ride. Totally redesigned, it's stronger, longer and more colourful than ever before. 

Have no doubt, the fourth generation of Ass Savers is your new best friend. Easy to hook up with, never being a burden and always there to cover your back, no matter what.

Works perfect with MUDDER Mini or SPEED MULLET Regular up front!


Technical data
Measures: 383x115.5 mm
Weight: 25.5 g
Material: 0.8 mm PP (Polypropylene)

Front rail attachment
Since 2014 all Ass Savers attach to the front saddle rails only, ahead of the seat post attachment. The advantage with this solution is that saddles are more uniform in this area and we can therefore provide a proper fit to a much wider range of saddles. Attaching only to the front rails makes the Ass Saver self centering. If you accidentally kick it without noticing, it will strive to regain it's centered position. This is one of the key innovations in saddle mudguard technology and is therefore protected under a pending patent No. SE PRV 1750201-4

Using origami principles, the patent pending FLIP-TIP™ technology allows you to securely fasten the Ass Saver to the saddle with a simple flip of the tip, just like a cycling cap. To unlock, just flip the tip back down and pull backwards. Carbon rails The FLIP-TIP® technology is fully compatible with all types of carbon saddle rails.

Saddle bag compability
The new Ass Saver is a lot easier to install with a saddle bag than previous models. While we can't guarantee a perfect fit with all saddle bags, great improvements have been made with considerably less interference as a result.

The secret to transforming a flat piece of plastic into a functioning product lies in the pre-folding prior to use. All the scoring lines have been carefully engineered to achieve locking mechanisms, self centering abilities, spring loading and material endurance. Please take the time to properly read the instructions/see the instruction video to ensure the best performance.


Customer Reviews

Based on 34 reviews
Simple, affordable and effective

It's quiet easy, stable and extremely fast to mount the Fender. I used it on a hardtail with 57 mm tires which is recommended for the fender. I fixed several positions:
There is NO POSITION protecting my back satisfactory. My backpack is alway full of mud and dirty water when cycling in rain.

Finally I removed them. Maybe it's nice for a Roadbike...

Good quality

Moved from sunny California to the PNW last summer and when winter hit it became painfully clear that I was going to need some fenders if I wanted to ride my bike for the next six months. While grabbing a front and rear set I came across this cool gadget and thought, "I don't enjoy getting my feet soaking wet" so I grabbed the Speed Mullet and it works great. Like all the Ass Savers stuff it's light, minimally packaged, and easy to install and use. Have ridden it on a couple of wet trail and pavement rides and it does what I need it to do.

dont work with SQlab saddle

Nice with the extra wide flap when riding mtb

Anders Nilsson
Big saver

Purchased for my son who already owns a plain one, he loved the design on this one and will probably fit on his new bike. Arrived in good time, packaged well.

Tove Lagström
Short lasting happiness

Great design and a real ass and back saver. The set up is great and even with a lot of mud it stays in place. With the sides folded down it's a good solid and light mud guard.