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Inner tube size and can you feel the slime in inner tubes?

Bicycles Asked by Bryan Mendez on January 4, 2021

I have a bmx bike with the tire size being 20″ x 2.4. Will a 20″ x 1.5- 2.125 fit or should I get a 20″ x 1.7 – 2.25 instead. If I get a slime inner tube will it be noticable on the weight or just a bit.

One Answer

I see this as a two part question.

  1. A 1.5- 2.125 width tube will fit in a 2.4" tyre fine.

I carry 2" wide tubes in my seat pack when I go cycling as a spare tube for my 2.35 tyres. I do so purely as it fits nicer in my pack and my tyres are tubeless. So if I get a puncture, I put the tube in and fix the tubeless when I get home.

  1. You won't notice the weight but Slime might not work as well with over streched inner tubes.

When you fit a slimmer inner tube in a wider tyre, it streches more. So if you get a puncture with a slimmer inner tube, the slime has to work harder (than with a correct size tube) to plug the hole as it is more likely to burst bigger due to the over streching.

Personally I would rather invest in a more puncture proof tyre than in using Slime.

Answered by abdnChap on January 4, 2021

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