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coventry_eagle
M_V
Why do so many tyres have a discrepancy in the width between the '700c' listing and the ETRTO listing?
EG, this Schwalbe Land Cruiser is listed as 700 x 35 but 622 x 37
Similarly, this CST tyre is listed as 700 x 40 but 42 - 622.
If you google 'ETRTO tyre sizes' or anything like that all the explanations suggest that the width should not change, ie, a 700 x 35 tyre should be a 622 x 35 or a 26 x 2" should be a 559 x 50 and actually, for the 26" tyres it does seem to ring true, every tyre that SJS have listed as 26" x 2" is also shown as 559 x 50 so why the difference with 700c/622 tyres?