Foxfolk Dirtskirt offers frame protection for Stumpjumper & Stumpjumper EVO

Foxfolk, a New Zealand based company specializing in frame protection, has begun shipping its first product; the Dirtskirt frame protector made specifically for 2019-2022 carbon Stumpjumper frames and 2019-2022 carbon Stumpjumper EVO frames. Made to adhere to and flex around the bike’s main pivot region, the Dirtskirt is said to prevent mud and stones getting in that small space, helping to reduce the risk of frame breakages caused by debris accumulation.

Foxfolk Dirtskirt Debris Guard for Specialized Stumpjumper

foxfolk dirtskirt specialized stumpjumper frame protector debris guard

The Dirtskirt is an acetate-backed EVA foam frame protector that adheres to the seat tube at the main pivot of the Stumpjumper’s flex-pivot suspension platform. In this position, it is designed to flex throughout the bike’s full range of rear wheel travel, helping to prevent mud and stones from getting stuck in the small space that exists between the rear of the seat tube and the chainstay bridge, where they can become the cause of frame breakages as the the two frame components act like a nutcracker.

fox folk dirtskirt lower link frame protector prevents debris build up

Foxfolk founder, Mikkel Johannessen, tells us he tested over 186 prototypes of the Dirtskirt on the trails of Queenstown, New Zealand, before arriving at the product that is available to purchase today. The Dirtskirt uses the highest density of EVA foam available on the market; Mikkel chose it for its high impact resistance as well as its malleability, which is important to allow for the bend required as the rear wheel is pushed through its travel.

foxfolk dirtskirt specialized stumpjumper frame protection 3m vhb adhesive

The adhesive employed by the Dirtskirt is the 3M VHB adhesive. There are no zip ties or velcro straps involved here, just the adhesive. Mikkel says “During our 18 month R&D of the Dirtskirt, we tested 57 different adhesives to ensure the product can absorb significant shock from suspension movement as well as withstanding any form of debris, mud, water, heat, cold, humidity across vastly different climates across the world. Our final adhesive selection is an ultra premium grade 3m VHB foam tape used in the aviation/automotive industry. We had Pro riders testing the Dirtskirt installed for over 250+ days over two full MTB seasons and the Dirtskirt product never came off. The key to successful installation is also prepping the frame which is why we supply an isopropyl alcohol wipe included in our Dirtksirt packaging”.

Pricing & Availability

At the moment, the Foxfolk Dirtskirt is available only for 2019-2022 carbon Stumpjumper frames and 2019-2022 carbon Stumpjumper EVO frames. The brand say they will consider making a Dirtskirt for the alloy Stumpjumper, and other models and bike brands, if they see sufficient interest from the market. 

The Dirtskirt retails at $34.95 USD and is available now, shipping worldwide.

foxfolk.co

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Sean
Sean
4 months ago

Make them for the Alloy Comp

Axmann
Axmann
4 months ago
Reply to  Sean

Yes please just picked up a 2022 SJ Evo alloy. Please make available for these.

Mikkel
4 months ago
Reply to  Axmann

Hey Sean, foxfolk™ is in the process of developing a Dirtskirt™ SKU for Stumpy alloys. Be sure to subscribe to our newsletter to stay up to date with future product releases at http://www.foxfolk.co

Mikkel
4 months ago
Reply to  Sean

Hey Sean, foxfolk™ is in the process of developing a Dirtskirt™ SKU for Stumpy alloys. Be sure to subscribe to our newsletter to stay up to date with future product releases at http://www.foxfolk.co

Sstiingya
Sstiingya
4 months ago

Nice! But seems like a version you trim to fit could be “mostly” universal and would be a great option to a LOT of bikes. Really they should be doing this and a frame wrap from the factory on every new frame and not leave us to fend for ourselves…

Mikkel
4 months ago
Reply to  Sstiingya

Hey there, would be great if a universal fit you could trim could work but during our significant 18 months of R&D the universal fit was really not feasible appproach as almost ALL rear full suspension frames are asymmetrical across the rear triangle as well as lower linkages as well as the different kinematics of the suspension platforms. All this adds up to completely unique and asymmetrical frames with almost NO commonality across brands and frame models. Even the translation between the Stumpjumper carbon and alloy models is dimensionally totally different which means each brand and frame model requires a custom tailored Dirtksirt.

Trkoo
Trkoo
4 months ago

I think this would scratch the non glued part as it will have to slide there with dirt underneath it.

Mikkel
4 months ago
Reply to  Trkoo

No the Dirtskirt doesn’t scratch the non glued part as no dirt can enter in the first place thx to the resolution of the design. Our R&D process was super thorough (186 prototypes) to ensure all of these aspects were fully resolved. The other product benefit is the ability for mechanics to fully service the rear linkage bearings with no need to remove the product.

Glen
Glen
4 months ago

I did a full Ridewrap on my 2022 stumpjumper and I actually did see a small crack and a chip where there were no film in this specific area. So I immediately got one without hesitation. Still waiting for my order but wondering how many are included and will it survive bike washes with brushes and sponges?

Mikkel
4 months ago
Reply to  Glen

Great you’ve done a Ridewrap on your 2022 Stumpy & great you’ve ordered a Dirtksirt™ to provide full protection in the lower linkage. Each Dirtskirt™ package comes with 1 x Dirtskirt™ as well as an isopropyl alcohol wipe for preparing your frame. Video installation provides clear sequential steps for successful installation. The Dirtskirt™ is manufactured using tough materials which will withstand thorough bike washes. The aviation grade 3M VHB foam tape provides phenomenal adhesion to frames, withstands extreme temperature variance while being shock absorbing as well as waterproof. All aspects of useage have been thoroughly tested as part of our R&D development.

ssort
ssort
4 months ago

Looks like a great product but be prepared for 3-4 week delivery

ssort
ssort
4 months ago

I stand corrected on the delivery. Just over 2 weeks and GREAT communication from FF. Don’t believe the tracking link they provide. It was not at all accurate and continued to show that it had not left Hong Kong.

One note: i got mine the other day and I’m not sure i see the value at 30.00 plus shipping. My sense is that this could be ‘magivered’ (sorry for the wrong spelling) for a lot less. But that said, the FF piece fits, looks good, etc but is just a plastic ‘flap’ that glues on to your frame.