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Tire size question for Novara A700

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Tire size question for Novara A700

Old 04-06-21, 08:21 PM
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AllWWorkNoPlay
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Tire size question for Novara A700

Hello everyone!

I just got me a Novara A7000 bike with a set of unmounted original road wheels that have no tires, and I am not able to determine the tire size. There are mountain tires already installed, and they read 53-559 (26x1.95). So I am trying to find the road tires of the right size, and I was just not able to make sense of the diameters: The diameter of road wheels is 22.75 (outer to outer, same size as mountain tires already installed), with width of 22-23 mm. There is a sticker on the rear road wheel that reads:
BCX 26x15 (or possibly 26x1.5, it's worn) 3 559 Weinmann
So I am confused here - if I get the thinner road tires, the mounted diameter won't be 26''. What tube size and the tire size I should pick, I'd really appreciate some help.

Thank you!

Daniel
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Old 04-06-21, 08:47 PM
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Bill Kapaun
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The BSD (bead seat diameter) of a 26" "mountain" rim is 22".
Of course a 1.50" tire isn't going to have the same diameter as a nominal 2.00" tire that this "26" size is based on.
My front tire on my Rockhopper is a 26x1.25" or a nominal 24.5" dia.
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Old 04-06-21, 09:38 PM
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Jeff Wills
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First rule of bicycle tires: don't measure them. You will drive yourself mad.
Second rule of bicycle tires: consult the guru. Tire Sizing Systems (sheldonbrown.com)

Like Bill, I ran 26 x 1.25" smooth tires on my mountain bike's wheels. Referring back to Sheldon's site, this is an ETRTO size 32-559 tire or 32mm wide tire to fit on a 559mm bead seat diameter rim.

The tube size should match the tire size or be slightly smaller. A too-large tube will make the tire hard to mount.
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