Rims and tires with ISO 630mm bead seat diameter. The former standard road bike rim and tire size, particularly in the US bike boom of the 1970's.

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MTB Why are 29ers considered better then the legacy 26'' or 27'' tires?

this is my first time here however I am a long time stackexchange user. I am planning to get a new MTB. Haven't ride for a long time 10y ago, as a kid I was always riding a MTB (I had an old low ...
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Deepening the front fork dropout

I have an old 27" road bike in a long, lazy and cheapish process of restoration. I'd like to put 28" wheels on, which requires 4mm longer brake reach. The bicycle used to have fenders and the existing ...
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Am I too heavy for my road bike tires?

I am wondering if bike tires have a weight limit. I have to admit, I am a large guy at 6'3" 250lb (190 cm, 113,5 kg), and I have always had issues with my road bike's tires getting pinch flats. I ...
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I have 27 inch wheels and need new inner tubes what size can I use

I have 27 x 1 1/4 inch tires on my bike and need to buy new tubes. Can I use 700c or just 27 inch?
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How do I know if I can replace the 27 inch wheels with 700c wheels on my bike?

I recently purchased an 80's Japanese bike off craigslist called "Jupiter King." It has 27 inch tires but I want to switch to 700c for greater wheel/tire selection. I specifically want some nice ...
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Easton EC90 TKO wheels, tire options

Does anyone have experience with tires for these rims? I've been looking at tubulars, and many of them (especially track versions) are listed as being 27x3/4 or 27x1, as opposed to 700x19 and 700x22. ...