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Kid's bike - Can I put 20" wheel on a frame that was meant for 18" wheels?

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Kid's bike - Can I put 20" wheel on a frame that was meant for 18" wheels?

Old 05-20-16, 07:26 AM
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Jamal
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Kid's bike - Can I put 20" wheel on a frame that was meant for 18" wheels?

So, my friend's kid's bicycle has 18" tire that is completely worn down. I'm having a really tough time finding 18" tires on local buy/sell websites, but there are a bunch of 16" and 20". Does anybody know if putting a 20" (or 16") wheel on my friend's kid's bike will work? No gears, just bake pedal braking, and a hand brake for the front wheel.

Thanks a lot.
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Old 05-20-16, 07:50 AM
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Kids bikes aren't made with lots of clearance, so no, a larger wheel won't fit.

That's not even factoring in the issues with the front brake, where the pads won't be at the right level for a different wheel size.

Wal-Mart sells 18" tires for ten bucks or so.
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Old 05-20-16, 07:52 AM
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Thanks for the reply. Unfortunately, the Walmarts in Canada don't, and that's where I am
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Old 05-20-16, 07:52 AM
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Kid's bike - Can I put 20" wheel on a frame that was meant for 18" wheels?

Probably won't work on the front. The fork and position of brake caliper will be specific to the rim size.
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Old 05-20-16, 07:58 AM
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Kid's bike - Can I put 20" wheel on a frame that was meant for 18" wheels?

Danscomp.com sells them.
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Old 05-20-16, 08:15 AM
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Canadian Tire has 18" tires
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Old 05-20-16, 08:18 AM
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Is the front tire OK ?? Rear tires wear down more, especially with coaster brakes that are more prone to skidding. Maybe leave the front alone ?
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Old 05-20-16, 08:40 AM
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Bike shops can order odd sized tires for you from their suppliers .. bring a sample..

Under ETRTO standards, Sutherlands lists 18" as being as large a bead seat diameter as 400 and as small as 355

in- between : 390, 387, 381 .. so just saying 18 inch is insufficient ..

big rim , skinnier tire to big tire smaller rim , still nominally 18'' outside..
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Old 05-20-16, 10:41 AM
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Originally Posted by Tusky View Post
Canadian Tire has 18" tires
You mean they have 475cm tires......
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Old 05-20-16, 10:43 AM
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Originally Posted by AlexCyclistRoch View Post
You mean they have 475cm tires......
^them some big ass tires!
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Old 05-20-16, 10:51 AM
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Originally Posted by Wilfred Laurier View Post
^them some big ass tires!
Sorry, meant 475mm, eh? So, how's life on the $5 bill, sir Wilfred??? MacDonald got the $10, that enfant d'chienne! Batare!!!

Last edited by AlexCyclistRoch; 05-20-16 at 10:55 AM.
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Old 05-20-16, 10:54 AM
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Il est mon copain. N'est pas un probleme.
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Old 05-20-16, 11:36 AM
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Originally Posted by Tusky View Post
Canadian Tire has 18" tires
Great place to find tires, eh?
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