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The Mucky Nutz Butt Fender is 40mm longer than previous versions meaning you get even more protection. This rear mudguard is small, effective and weighs only 19g.
The Mucky Nutz Butt Fender is 40mm longer than previous versions meaning you get even more protection. This rear mudguard is small, effective and weighs only 19g.
Mucky Nutz

Mucky Nutz Butt Fender Black/Blue

£6.75 £7.50 10% off
in Customer Rewards when you buy this item today

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With Pre-Launch, the date when we expect to receive the product ourselves is still a little too hazy to be confident in accepting Pre-Orders.

So, instead, you can submit your email address against the item you are interested in and we will email you as soon as stock arrives on the system.

Estimated Delivery & Collection Dates

Estimated Delivery & Collection Dates are given on Pre-Order and Pre-Launch products. They are for indication purposes only and can change at any time without notice.

The dates we provide are based on indications given by our suppliers. Whenever we get updated information from our suppliers we will endeavour to update the Estimated Delivery & Collection Dates provided on product pages.

We estimate this will be ready for despatch to you or collection via Click & Collect on Undetermined
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Not happy with your purchase? Send it back to us or return in any of our stores and we will give you a full refund or exchange!


In the unlikely event that you are dissatisfied with your purchase please feel free to return your goods within 60 days of the purchase date for a full exchange or refund. Any item (excluding food and underwear) can be returned to us for any reason provided it is returned in ‘showroom condition’, with its original packaging, tags and a valid receipt/delivery note.

Simply box up your items for return, include a cover note with the word REFUND or EXCHANGE inside & follow the below steps for safe return to our warehouse; where your return will be processed promptly.

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It is your responsibility to ensure that the item is returned to us in a safe and secure manner, and in the event of a refund or exchange, in saleable condition (in original packaging and including all warranty, cards, manuals and accessories).

Customers are accountable for return shipping charges.

  1. You should always keep proof of postage and we advise you to use a ‘signed for service’ when returning goods.
  2. Send your package using a recorded delivery method (always keep a copy of your receipt!) to the following address:

Leisure Lakes Bikes,
Unit 9 Centurion Industrial Estate,
Centurion Way,
PR25 4GU

Checkout by Amazon Returns

If you used the pay by Amazon option when checking out then please send your package using a recorded delivery method (always keep a copy of your receipt!) with a note inside stating whether you want an exchange (what you want it exchanging for) or refund, to the following address:

Leisure Lakes Bikes
Unit 9 Centurion Industrial Estate
Centurion Way
PR25 4GU

Bike & Bulky Item Returns

If you wish to return your bike to us please keep it in the box it arrived in and call us on 01772 644340 and we will arrange a collection.

Please note the following:

  • a) If we have sent you the incorrect bicycle, we will cover the cost of collection and delivery of the correct model.
  • b) If we have delivered the bicycle you ordered, but upon inspection you decide it is not the bike for you, we will charge you £50.00 for the collection.

Please do not ride the bike as a full refund cannot be given if the bike has been used or damaged.

Return Items to a store

Any item (excluding food and underwear) can be returned to any Leisure Lakes Bikes store not just the one you made your purchase at, including those made online. The item must be returned in ‘showroom condition’, with its original packaging, tags and with a valid receipt/delivery note.

Wrong size or you don't like the item?

If returning items that are not suitable for either refund or exchange you are accountable for the delivery cost in returning it to us. You should always keep proof of postage and we advise you to use a ‘signed for service’ when returning goods.

New faulty items/ Wrong Item Received

If you have received items that are faulty or not what you ordered send them back to us (using the steps above) and we will cover the delivery cost of the return if it is within 14 days of delivery. If we have supplied the correct product, it is not faulty or it is outside of the 14 days we can not be liable for your postage charges. You should always keep proof of postage and we advise you to use a ‘signed for service’ when returning goods.

In the event that you have received items that are fault or not what you ordered, please send them back to us as soon as possible. Only in these cases will we cover the cost of the return shipping charges.

Faulty Items

If you have received items that are faulty please send them back to us using the steps above. Please include a covering letter describing the fault and if you would like the item replacing or refunding. Once the item arrives back at our Mail Order Centre you will receive an email notifying you about the progress. Faulty items are then forwarded onto the suppliers to confirm the warranty issue. Please be patient with us as we need to receive this confirmation from the suppliers before we can process your request for a replacement/refund.

When returning the item please use Royal Mail1stClass Recorded* so that you have a tracking reference just in case! If your item arrived faulty we will refund your postage cost. If the item was in full working order at the time of delivery to you, we can not refund your return postage cost.

*In the event that you return a faulty/incorrect item we will refund your postage charge as long as it is 1stClass Recorded or a lesser value service. We do not refund premium services.


Refunds will be processed using the same method of payment used for the original purchase. Credit and debit card refunds must be made to the card used for the original transaction, cheque payments will be refunded in cash but due to banking restrictions can only be refunded at least 14 days after the original purchase date. Due to the high incidence of fraud we regret that we are unable to offer any refund without a valid receipt/delivery note.

Refunds will be made for faulty or incorrect items, including any delivery charge incurred by the buyer (excluding ‘Special Delivery’) in the return of the item. If the products you ordered are delivered to you in good condition but you wish to return them for any reason we will refund the full value of the goods excluding any carriage charge upon receipt of your returned goods.

Items won’t be considered lost until after 15 working days of items beingdispatched. Once the 15 working days are up we will issue a refund or replacement.

Not received your order?

If you have not received your order please call us on 01772 644340 and a member of staff can confirm the shipping date. Unfortunately we cannot consider an item to be lost until 15 working days has passed (according to Royal Mail procedure). Once the 15 working days have passed we will be able to issue a full refund or resend your order.

Mucky Nutz Butt Fender Black/Blue

Brand:Mucky Nutz


The Mucky Nutz Butt Fender is 40mm longer than previous versions meaning you get even more protection. This rear mudguard is small, effective and weighs only 19g; making it one of the lightest rear mudguards on the market. The butt fender will prevent the rider from “soggy arse syndrome”, this is the effect caused by the rear wheel throwing mud and rainwater to your lower back region, which then soaks through to your derrière, leading to a very uncomfortable chafing feeling, especially on those longer rides".

This Mucky Nutz mudguard will attach to any saddle with two rails and it doesn't require any additional fasteners and hang over the back wheel. The mudguard is fitted as close as possible to said back face for optimum muck catching. It also joins the already established Bender Fender range and in doing so uses the same technology and materials, reaping many of the known benefits. The Mucky Nutz Butt Fender also prevents the top of your seatpost from getting clogged up and it's also easy to clean as it's flexible and opens flat. This allows you to simply wipe it and you're done. The butt fender comes in three colours, black, white, and clear, so you can choose the colour which will suit your bike the most.

Mucky Nutz Butt Fender Features

  • Extremely flexible and lightweight
  • Compatible With all standard double rails
  • Easy to fit and take off
  • Simple to clean, just wipe it and you’re done
  • Prevents you and your seatpost from getting covered in mud
  • Size: One Size
  • Weight: 19g

Mucky Nutz Bender Fender Range

  • Standard Fender Bender: A lightweight 22g and now 16% longer providing even more protection. We've done this by taking away material from non-critical areas and dumping it where it's needed, i.e. between you and the rubber.
  • Lite Fender Bender: It is slightly thinner than the Standard version and lighter at 16g (including fasteners).
  • XL Fender Bender: It is the same thickness as the Standard Bender Fender but provides ultimate protection at a modest 32g. As with the original Bender Fender it can be used up front on the fork or at the rear to protect the rear sus and front mech.


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    Mucky Nutz Butt Fender Black/Blue review by Professional Review from Singletrack Magazine , on 08/05/2017


    The design of the Butt Fender is extremely simple. Constructed from a single piece of flexible moulded plastic, it is basically a flap that attaches to underneath the back of your saddle via protruding tabs on either side of it. That’s it. No Velcro. No annoying little bolts to faff about with and nothing to over-tighten, leading to the inevitable ping of cracking plastic and a frantic search for the superglue. Along the length of mudguard, there are pre-moulded bend points which when folded create a stiffer structure and help to keep the mudguard firmly attached to the saddle.

    Fitting the mudguard took only a matter of seconds. While there are easy to follow instructions on the Mucky Nutz website, fitting the mudguard is pretty intuitive. Despite being only a simple interference fit, the Butt Fender has remained rock solid throughout the period of the test, only moving to one side when my bike was leant against a wall. I fitted it to a WTB saddle although it is worth checking your saddle before purchase to ensure that it doesn’t have, as Mucky Nutz put it so eloquently on their website, any daft bits at the back sticking down, such as moulded reflective panels, which can interfere with the Butt Fender.

    While I did experience some spray further up my back and on the back of my thighs, it wasn’t that much worse than what I have experienced with traditional bolt-on mudguards. The design means that the clamp for my saddle rails has remained free of dirt, which when it comes to tightening up a loose saddle can be the difference between a five-second job and ages spent fiddling about to clean out hex bolts from accumulated grime. Although the Butt Fender is attached to the underside of the saddle rails, there is still enough space to allow a bolt-on saddle bag to be attached; I’m currently running it with a Lezyne Pod Caddy with no issues.

    With the Butt Fender, Mucky Nutz has engineered a solution to the problems posed by traditional mudguards that is simpler, cheaper, substantially lighter but most importantly almost as effective as the competition. Having used it on some frankly filthy rides, I occasionally wonder why the hell nobody else came up with the idea before now. Its discrete looks don’t upset the aesthetic of the bike and the Butt Fender neatly avoids the compromises of traditional designs. I can’t believe that I am waxing lyrical about what is ostensibly a cheap piece of moulded plastic but then some of the greatest engineering designs are also the simplest. Buy one. Your bahoochie will thank you.

    Read the full review at

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