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Mr. Tuffy XL Series Tire Liners for Fat Bikes

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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
    Reviewed 12/17/2018
    by Anonymous
    Casual Cyclist
    Value Rating
    Overall Rating
    Double skinned in Big Apple 2.35 29

    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.

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    Reviewed 8/7/2019
    by Anonymous
    Daily Commuter
    Tacoma, WA
    Value Rating
    Overall Rating
    Great product to simplify life

    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.

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    Reviewed 8/30/2018
    by Cahuck
    melbourne, fl
    Overall Rating
    Prompt shipment

    These were delivered to me quickly & brand new as expected

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

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    Thank you for your feedback.
    Reviewed 3/9/2018
    by Anonymous
    Cycling Enthusiast
    Overall Rating
    1 of 2 customers found this review helpful.
    So far have not had a flat since installing the liners.

    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.

    Was this review useful to you? Yes/No
    Thank you for your feedback.

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