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Kevlar tyres + tyre liner?

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Kevlar tyres + tyre liner?

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Old 07-11-18, 09:35 AM
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seanspotatobiz
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Kevlar tyres + tyre liner?

I have been using Schwalbe Marathon Plus tyres with kevlar in their construction which minimises the number of punctures I get. I heard GatorSkins are just as good. I was wondering whether it would make sense to combine these with a tyre liner like that "Mr Tuffy" stuff for the ulimate in penetration deflection or is that just crazy talk? I'm not at all interested in saving weight; the heavier the bike, the better the exercise but I am interested in reducing time spent fixing punctures.
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Old 07-11-18, 10:05 AM
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After a series of punctures on my Roam 2 I went to (of all places) Walmart and they had Aramid lined tires. I had just ordered tire liners so I elected to use both, been running for 3 years now with no flats.
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Old 07-11-18, 12:51 PM
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Originally Posted by seanspotatobiz View Post
I have been using Schwalbe Marathon Plus tyres with kevlar in their construction which minimises the number of punctures I get. ...
I was not aware that the Marathon Plus tires had any kevlar in them; their extra puncture protection came from an extra-thick layer of tread rubber. I have not looked lately so maybe the newer ones do...?

Originally Posted by Rootman View Post
After a series of punctures on my Roam 2 I went to (of all places) Walmart and they had Aramid lined tires. I had just ordered tire liners so I elected to use both, been running for 3 years now with no flats.
Kevlar did not turn out to do real well for puncture protection, for two reasons:
1) the kevlar suffers from internal abrasion and drives up the rolling resistance of the tire.
2) eventually the kevlar fibers become brittle and destroy themselves from self-abrasion, and after that they don't increase the rolling resistance, but they don't give any more puncture protection either.

At one point pretty much all of the "tough" tires on the market had kevlar tread belts in them. Nowadays, only a small number do, with others using spectra, dynema or just extra layers of nylon or polyester in the tread areas.

The best way to increase puncture protection was found out a long time ago, and that's the method that the Marathon Plus uses: just put on a really thick layer of tread layer... but that has its disadvantages also.
If you are getting frequent punctures, it might be helpful to explain exactly what is doing the puncturing.

-------

I dislike tire liners because I find that they tend to shift and puncture the inner tube all on their own. They also add a not-insignificant amount of rolling resistance as well. Some people like them however?
You can also get extra-thick inner tubes in some sizes that are 2X as thick in the outer-tread area. They add weight however.

There are also airless tires available--which have even worse ride qualities than thick tires/tire liners/thick tubes... but hey, If you *never* want flat tires that's the best way to guarantee it.
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Old 07-11-18, 01:33 PM
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What types of flats are you getting?

There seem to be several major types of flats.
  • Glass
    Glass can cut through just about anything, and often leaves big slices in the tires. It may also slowly burrow into tires if left alone.
  • Radial tire wires.
    These suckers are almost invisible. But like little hypodermic needles aimed directly at your tube. Once they get going, I'm not convinced anything will stop them.
  • Goatheads and thorns.
    Not sure about these. They may well be something that a thicker tire helps with. I.E. Provide enough buffer that the thorns don't work down to the tube. Periodically clean the tire from the goatheads and thorns.
  • Nails and screws.
    Great for spectacular photos... but just avoid them.
  • Pinch Flats (snake bites)
    No tire protection other than a true tubeless will stop these. Choose higher volume tires, and keep adequate pressure in them. Avoid running over debris.

In another thread, someone recommended Panaracer Flataway liners. I have a couple, but haven't started using them as I really don't get too many flats.

I do well with Gator hardshells for most of my riding.

I did try out some Michelin Protek Cross Max tires. Heavy tires. Excellent traction. I think I put a few thousand miles on them, and not even a hint of a flat. I'm not sure if there is a major difference between them and the Schwalbe marathon Plus tires, but I did get a flat with my Schwalbe tire, almost the day after I mounted it (big chunk of glass).

A couple of additional things to consider.

Tubeless. They do require some maintenance, but in theory, using a sealant, they fix their own flats. You may also use sealants in regular tires, with the latex based sealants (anything that isn't green slime) sealing best, but requiring replenishing.

Flat-Free solid rubber. Tannus tires are probably the most common ones now, but Specialized also has some solid tires, I think. A little slower/harsher ride, maybe a little less traction, but absolutely no flats, unless you slice the tire off the rim. I've picked up some good sized slashes in mine, but they still roll fine.
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Old 07-11-18, 07:23 PM
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Before you look into all these solutions, make sure that you actually have a problem. How many flat tires have you experienced? If none, maybe you are looking for a solution to a non existent problem. I am able to repair a flat tire and I carry the tools and materials to repair a puncture while out on the road. Takes me about 10 minutes. However, not using puncture resistant tires or tire liners, I haven't experienced a flat tire of my own out on the road for more than 2 years. However, when I ride, I carry everything necessary to effect a repair. It all fits into a small bag strapped under my saddle. Of course, I buy good quality tires, and I replace them before they have worn out.
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