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Mr. Tuffy
XL Series Tire Liners for Fat Bikes

Mfg PartNum:
  (5 customer reviews)
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Lightweight puncture protection.

Mr. Tuffy XL Series Tire Liners for Fat Bikes prevent puncture flats using their lightweight, super-durable urethane liners. The new XL series is made for fat bike and fits tires up to 5.0."


  • 2XL fits 26"/29" x 2.35"-3.0"
  • 3XL fits 26"/29"x 3.1"-4.0"
  • 4XL fits 26"/29:x 4.1"-5.0"
  • Just like the Original version except specially designed for Fat Bike and plus sized applications
  • 2-ply rubber shield fits between tire and tube to prevent flats
  • Fits both 26" and 29" tires
  • Made in the USA
  • Sold in pairs

  • B-Stock - This product has one or more B-Stock units available. These units can be purchased at a discount (see option select). B-Stock units were returned from other customers and may have missing or damaged packaging materials. These units are otherwise as new. The full manufacturer warranty applies. Click Here for more information.

    2XL - 26/29 x 2.35-3.0 (Green)

    Mfg PartNum: MRT2XL 

    Mfg PartNum: MRT2XL 

    3XL - 26/29 x 3.1-4.0 (Tan)

    Mfg PartNum: MRT3XL 

    Mfg PartNum: MRT3XL 

    4XL - 26/29 x 4.1-5.0 (Teal)

    Mfg PartNum: MRT4XL 

    Mfg PartNum: MRT4XL 

    Ordered by Most Relevant First
    5 stars
    4 stars
    3 stars
    2 stars
    1 stars
    No more flats...yet
    by PNW RAD Rider
    Daily Commuter
    Seattle, WA
    2 of 2 customers found this review helpful.

    Western was easy to order from, and Mr. Tuffy has proven its worth. I installed them myself inside Kenda tires on my RAD City Power Bike. I watched a video first, and because the Kenda tire was bigger than that shown in the video, the install was easier than I expected - smooth and complete. Up until Mr. Tuffy, I'd experienced a front flat and two rear flats since purchasing the RAD in late August 2018. Mr. Tuffy does seem to have slowed down the speed a tad, but there have been no more flats, the ride feels more secure, and that's riding on gritty, winter crud in the bike lanes where the flats occurred. Western shipped Mr. Tuffy sooner than I anticipated. I bought a set for my wife's RAD City too, but because she hasn't had a flat yet, she didn't want me to install them. One more thing. I'm 74 years-young, and if I can install Mr. Tuffy...well, maybe you can too.

    Reviewed 1/24/2019
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    So far have not had a flat since installing the liners.
    by Anonymous
    Cycling Enthusiast
    1 of 2 customers found this review helpful.

    I ride the fat tire bike on a lot of different terrain and had a couples of punctures in the past, So far no problems since installing the liners.

    Reviewed 3/9/2018
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    Double skinned in Big Apple 2.35 29
    by Anonymous
    Casual Cyclist

    Double skinned these liners inside a 29 Big Apple 2.35 rear due to thorns. Stuck them together with thin double sided adhesive tape to hold them in together evenly during installation. Running BigBen 2on front with GreenGuard. The Apple needed more protection being on a norco vlt r2 ebike rear. Changing the rear is not quickeasy.

    High speed no problem. Top speed of 57.7 kph downhill into a bend stable.

    Make sure you cut overlap for better balancestability at speed. You can keep the excess in your spares kit as a worse case emergency sleeve. Installed just one initially leaving overlap and bike stability was impacted negatively above 40kph. Hence cut them

    Apart from that initial learning curve they've proven to be bullet proof onoff road.

    Reviewed 12/17/2018
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    Great product to simplify life
    by Anonymous
    Daily Commuter
    Tacoma, WA

    I use these in mountain bike tires, both knobbies and smoother trail tires, the inconvenience of flats is greatly reduced and on a plus or fat bike the added weight is negligible.

    Reviewed 8/7/2019
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    Prompt shipment
    by Cahuck
    melbourne, fl

    These were delivered to me quickly & brand new as expected

    I installed them about 300 miles ago and have been very happy

    Reviewed 8/30/2018
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