Bike tyres / inner tubes
samsung_laptop
Posts: 301 Forumite
I'm looking to buy a inner tube and tyre for my daughters mountain bike so if the tyre that's on the bike says (54-406) 20 x 1.95 can I replace it with a (50-406) 20 x 1.95 tyre. The inner tube I removed says 20 x 1.75/190/1.95 so can I replace it with a 20 x 1.75-2.125.
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I would say yes to both questions. You are replacing like for like with the size of the tyre (20x 1.95) the 20 refers to the size of the wheel and the 1.95 is the tyre width both measurements are in inches.
The inner tube you are looking to replace the original with fits tyres ranging from 20 x 1.75 to 2.125. (20 been the tyre size and 1.75 to 2.125 the tyre width again both in inches. A bit like a pair of socks that says fits size 5-8Sealed pot challenge member 4370 -
pinkladyvenus wrote: »I would say yes to both questions. You are replacing like for like with the size of the tyre (20x 1.95) the 20 refers to the size of the wheel and the 1.95 is the tyre width both measurements are in inches.
The inner tube you are looking to replace the original with fits tyres ranging from 20 x 1.75 to 2.125. (20 been the tyre size and 1.75 to 2.125 the tyre width again both in inches. A bit like a pair of socks that says fits size 5-80 -
54 to 406 and 50 to 406 is the metric measurements of the tyre and its width. To be honest I always ignore these and stick to the inch measurements as it is easier when replacing tubes and tyres.Sealed pot challenge member 4370
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If you're not sure, just pop into your local bike shop and they can double check for you.0
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For everyday tyres and tubes, nothing wrong with Halfords/Evans etc. I wouldn't take a vintage racer into Halford for a full strip down and rebuild though.0
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samsung_laptop wrote: »Would you know what it means by the numbers (54-406) or (50-406). It's a lot different to years ago when you just went and bought a 20 x 1.95 inner tube.
You're going to wish you'd never asked!
Sheldon Brown was a great source of knowledge on all things bicycle related. He died some time ago, and some of his stuff is dated, though I think there have been some attempts to keep it up to date. He is still about as good as you will ever need on tyre sizes however.0 -
pinkladyvenus wrote: »54 to 406 and 50 to 406 is the metric measurements of the tyre and its width. To be honest I always ignore these and stick to the inch measurements as it is easier when replacing tubes and tyres.0
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