metric conversion 700 x 38 to imperial
10-03-16, 05:10 PM
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metric conversion 700 x 38 to imperial
Can anyone give me the simple conversion in imperial measurement for a inner tube that will fit in a 700 x 38 tire?
10-03-16, 06:56 PM
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10-03-16, 08:39 PM
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Divide mm by 25.4 to get inches. 38 comes out to 1.49 (that is, 1.5 inches) wide, and 700 to 27.55 (that is 27 1/2") diameter.
10-03-16, 09:34 PM
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That'd be about 1.5"
The question I have: even having 27" tires, most of my tubes are measured in metric, where are you looking for tubes in inches?
The question I have: even having 27" tires, most of my tubes are measured in metric, where are you looking for tubes in inches?
10-03-16, 09:42 PM
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10-04-16, 10:40 AM
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'28' is a sew up tire label .
Imperial (now, British/American 'special relationship') would be 27" x 1.25".. ISO 630..
A 700C is 622 which in now also '29er'..
when America is 'Made Great again' , the Foreign Metric system will be Illegal as will anyone speaking French or any other Language not using AP syntax.
'/,
Imperial (now, British/American 'special relationship') would be 27" x 1.25".. ISO 630..
A 700C is 622 which in now also '29er'..
even having 27" tires, most of my tubes are measured in metric, where are you looking for tubes in inches?
'/,
10-04-16, 12:02 PM
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Well, I checked. Our friend Sheldon Brown had put together this compendium: Tire Sizes
So its way more complicated than converting a number. Also, Sheldon had pointed out that even though 1.75 and 1 3/4 are mathematically the same, they refer to different size tires!
Check out the article.
If I read it right, a 700x38 is a wheel with a 38 mm rim width and a 622mm bead diameter. AND... buying an "inch" tire will not result in a good fit. So buy tires that state explicitly that they are 700x38.
So its way more complicated than converting a number. Also, Sheldon had pointed out that even though 1.75 and 1 3/4 are mathematically the same, they refer to different size tires!
Check out the article.
If I read it right, a 700x38 is a wheel with a 38 mm rim width and a 622mm bead diameter. AND... buying an "inch" tire will not result in a good fit. So buy tires that state explicitly that they are 700x38.
Last edited by WizardOfBoz; 10-04-16 at 12:14 PM.
10-04-16, 12:45 PM
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Because "27.5 Plus - tubeless ready!" is easier to say than "ETRTO 584 with a TCS-style, 25mm-wide bead and bed and an 80mm tubeless tire, but we still put a tube in it"
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10-04-16, 02:21 PM
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Why try to find a tube in imperial measurements to fit a 700c tire? It's not hard to find 700c tubes online or in stores. A quick search on amazon shows this: https://www.amazon.com/s/ref=nb_sb_n...700c+x+38+tube
10-04-16, 03:44 PM
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650c is a 26", close enough that most bikes made for one can take the other (as long as a rim swap goes with the deal.) I think 650b, which is smaller than 650c or 26", is called 27.5". 700c is 622, which is smaller than the old 27", but still it's referred to as 28". Why? I guess because 27" was already taken. It's kind of a meaningless to assign a size in a different system.
10-04-16, 06:21 PM
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It is useless to try to convert 700 x 38 to Imperial measurements because tires and tubes no matter where you live are not sold that way. Almost anywhere you buy them, tires and inner tubes will use the same measuring system that you already have
10-04-16, 08:48 PM
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650c is a 26", close enough that most bikes made for one can take the other (as long as a rim swap goes with the deal.) I think 650b, which is smaller than 650c or 26", is called 27.5". 700c is 622, which is smaller than the old 27", but still it's referred to as 28". Why? I guess because 27" was already taken. It's kind of a meaningless to assign a size in a different system.
10-05-16, 02:13 PM
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Agree, but if the OP is asking a very basic question about getting tubes for a tire, isn't there a possibility that he/she may be able to use info on getting the right tire for the rim?
Besides, I hadn't known that 1.75 does not equal 1 3/4 in tire-land and thought others might find Sheldon's article interesting.
Besides, I hadn't known that 1.75 does not equal 1 3/4 in tire-land and thought others might find Sheldon's article interesting.
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