ASB Mad Wolf


Special artist edition by Sam Dunn!

  • 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 or dirt

The mighty Ass Savers Big in a special Mad Wolf edition by no one less then mega talented Sam Dunn from the UK! Stylish protection 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. 

Match it with the MUDDER Mad Wolf front mudguard for your MTB!


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 10 reviews
Perfect fit

Simple, yet very effective design. Does what it says on the label very well. Went for the Spektrum to brighten-up my plain looking bike. Very easy to fit: Brilliant design!

Keeps the mud and rain off!

I really loved my ass-saver, it seemed like a great and stylish alternative to my road bike! I also found that I got excellent costumer service, as I had a made a mistake in the shiping adress.

Unfortunately, it feel off during my first usage and I never found it again, so that left the experience alittle sour tasting. Wishing I could have it back!


Wonderful protection that does what it promises and also looks good! Easy to install and durable.

Belgian essentials

hi guys, I purchased the Mudder Mini to be used on my ciclocross SWorks Crux at the Tuscany Trail 2020 (yes, is was raining for 2 days ....)
it works perfect, many thanks for this wonderful product


I have one of these for my town bike and liked it so much I got them for mine and my wife’s mtb’s, they fit great, and look great too, contemplating for my road bike too at some point.