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Using 20 inch wheels on a larger bike

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Using 20 inch wheels on a larger bike

Old 08-04-21, 11:46 PM
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shinchan150
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Using 20 inch wheels on a larger bike

Aloha all, first post here.
I bought a bike from a military family that moved here (Hawaii) from Japan. Both tires are flat and the rubber is cracked so I need to replace them. The bike has 22 x 1.5-inch (40-501) tires to fit a 22x 1-3/8 rim. I have looked but I can not find those sizes here. I emailed the company in Japan asking for help but no response yet. I'm still searching Japanese websites to find replacements but no luck so far. So my question is- can I just replace those with smaller tires, 20 inches, or is this an apples vs oranges thing? No idea how this would work so I pose the question to those more knowledgeable than I. The bike is a "mamachari" bike used for shopping/commuting by mothers with kids- Bridgestone Angelino Mini (I can't post pics or links yet). I got it for my wife who used to ride one in Japan and loved it. Any help is appreciated.
Mahalo,
Randy
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Old 08-05-21, 12:08 AM
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No. You would need new wheels entirely and possibly new brakes and such. Every tire and rim will fit a certain ISO diameter and a smaller one wouldn't fit and a larger one would be too big. Potentially the bike could be converted but honestly I wouldn't want to put a child in front of me at least not if I loved the child. I don't want them as my airbag and there are better less destructive/violent ways to deal with over-population. Plus I don't want to have to steer the child rather just have them on the back having to steer an extra 30-50+ pounds doesn't sound like a lot of fun especially that high up.

You might just see if you can find some commuter shops in Japan who specialize in that stuff and see what is possible. If you speak any Japanese or write it or have someone who can it could help.
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Old 08-05-21, 12:22 AM
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If you're patient when it comes to shipping, there are some 22" tires available pretty cheaply on Aliexpress:

https://www.aliexpress.com/item/32979927080.html
https://www.aliexpress.com/item/32966056184.html
https://www.aliexpress.com/item/4001281624878.html

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Old 08-05-21, 12:42 AM
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https://www.yodobashi.com/product/100000001003135733/
https://www.yodobashi.com/product/100000001002722333/

Here's two 40-501 Bridgestone options available through Yodobashi Camera. I'm sure there's other options out there.
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Old 08-05-21, 01:23 AM
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Go ahead and upload some photos to your album:
https://www.bikeforums.net/g/user/543156

As far as tires...
https://www.schwalbetires.com/tech_info/size_markings
https://www.sheldonbrown.com/tire-sizing.html

There appear to be numerous 22 inch tires. Sheldon brown lists the BSD 501 as:
501 British, 22 x 1 3/8, 22 x 1.00

I hate websites that don't list the BSD/ISO/ETRTO for the tires. Or use a photo that doesn't match what they are selling.

You might be able to fit narrow 24" tires/wheels (ISO 507) on the bike. Of course meaning to replace the entire wheels.
https://www.ebay.com/itm/392274222286
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Old 08-05-21, 08:05 PM
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shinchan150
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Wow, thanks guys for all the help! I guess I'm not that internet savvy after all haha. Kabuto, those tires are what I'm looking for, I'll try to order and have them shipped to my in-law's place in Japan and then have my wife pick them up. If not, I'll try the Aliexpress way. Thanks, Clifford for letting me know about the album, I'll clean the bike up and take some pics. Mahalo again!
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Old 08-05-21, 09:39 PM
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Originally Posted by shinchan150 View Post
Kabuto, those tires are what I'm looking for, I'll try to order and have them shipped to my in-law's place in Japan and then have my wife pick them up.
As mentioned, there are several 22" standards.

If you do order from above, I'd probably choose the 22x1 3/8 tire as the most likely one to fit.

https://www.aliexpress.com/item/32966056184.html

If you let your cursor hover over the shop name, there is a "Contact Now" option where you can ask them for the ISO/BSD size.
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Old 08-08-21, 09:59 PM
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Here's a 22 x 1.75, by Schwalbe, available through Amazon.
https://www.amazon.com/Schwalbe-Crui...8481361&sr=8-5
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