The reason I am asking this is I am a pretty big rider who carries cargo sometimes. Let us say close to three hundred pounds all told. The streets where I live are terrible with many pot holes. There are also a lot of construction sites that will be there for the next few years. I got nine flats in one month/150 kilometers. They are not pinch flats. All are at the exact center of the outside of the tube. They are not always in the same spot either. Only once have I seen any debris embedded in the tire and I didn't think it was responsible for the flat. They are the stock tires from when I bought the bike a 2017 Norco Yorkville. I would just bite the bullet and buy great tires like schwalbes but could really use the funds elsewhere on the bike. I forgot to mention. The tires are inflated to 75 P.S.I. close to the 80 max.

  • 1
    How about you try tubeless? can't pinch if you don't have tubes Dec 10, 2017 at 16:54
  • The 80 max is arbitrary. You can (and probably need to) go higher.
    – Batman
    Dec 10, 2017 at 19:30
  • 2
    Not an answer - but align the label on the tyre with the valve stem. When you find the hole, it narrows down the search area to ~50mm (2 inches) Could easily be debris you've missed. Flex the tyre back on itself and look under a strong light.
    – Criggie
    Dec 10, 2017 at 19:56
  • 1
    @Batman The max printed on the tire is not arbitrary.
    – paparazzo
    Dec 10, 2017 at 21:18

2 Answers 2


Exact center of the outside of the tube (and no debris) indicates a pinch flat. Why do you assert not a pinch flat?

My experience with tire liners is they abrade the tube. I would wear out a tube a year riding about 500 miles.

Puncture resistance tires work better for me.

Why you are not seeing debris in the tire is a mystery to me.

You might also try tubes with sealant for small punctures.

  • Perhaps I am not using the correct term. I thought pinch flats were relatively the same as snakebite flats and on the side of the tube. Thanks for your patience. Even though I have been riding for a while maintenance is new to me.
    – Kevin Rowe
    Dec 10, 2017 at 15:44
  • Yes pinch and snake bite are the same. I guess the confusion is outside of the tube.
    – paparazzo
    Dec 10, 2017 at 15:57
  • I guess my newbie terminology is confusing. By outside I mean the exact center of the cross section of the tire and tube. Alnost exactly where the seam runs along some tubes. I cannot bunny hop and so avoid curbs. It is almost impossible to avoid pot holes and broken pavement.
    – Kevin Rowe
    Dec 10, 2017 at 16:32
  • @KevinRowe Cool, some times you have a seam on the side.
    – paparazzo
    Dec 10, 2017 at 16:36

Tire liners have an economy/cost upside because they're indefinitely reusable and don't cost all that much to start with, and the thick commonly seen ones (Stuffy, Rhinodillo, others) do they do their job very well. They block common intruders like glass, road debris, and thorns very effectively. They have the downside of a rolling resistance hit, making you a little less efficient on the bike.

Many riders just don't care about or notice that downside, and have an easy time riding and forgetting. Shorter distance rides in an urban environment tend to push one in that direction. Liners can make a lot of sense for that rider. Others are more bothered by it, and lighter armored tires become more attractive.

  • I guess my question has been answered well in more ways than one. It is time to do some comparison shopping, Do I have to click on something or just let it ride.
    – Kevin Rowe
    Dec 10, 2017 at 23:06

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