Joined: Apr 2010
Posts: 13,501
Likes: 995
From: Boston-ish, MA
Bikes: 72 Peugeot UO-8, 82 Peugeot TH8, 87 Bianchi Brava, 76? Masi Grand Criterium, 74 Motobecane Champion Team, 86 & 77 Gazelle champion mondial, 81? Grandis, 82? Tommasini, 83 Peugeot PF10
Strange tire marking
I'm posting this to C&V instead of Bike Mechanics because it is more a reflection of how things were a few decades ago.
Today I replaced some old tires. The one on the front was a Specialized, marked 1-1/8", 110psi. It was noticeably narrower than the Pasela TG 1-1/8" I had put on the slightly narrower rear wheel. Okay, so that just shows that tires can be different even with the same markings.
But then I noticed that embossed on the sidewall was 23-630. Huh? No, it was not a 28 smudged out to form 23. I looked again. It was definitely 23. So what is it supposed to be, I asked myself? Wider than an inch or narrower? When inflated the sidewalls measured about 27mm, what I would have expected.
Curious.
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jimmuller