Quote:
Originally Posted by Hanno Spoelstra
AFAIK, tyre flaps are sized accordingly to the inner and other tyre they are to be used with. So you would be looking for 11.00-20 inner tube to go with an 11.00-20 tyre.
BTW, the rim/wheel size is 6.00x20, so the width of the rim where the bead sits is 6 inches wide. The tyre's size is 11.00-20, whereby the width of the contact area is 11 inches.
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Section width of the tyre, not the contact area.
One thing to consider when selecting flap by tyre size is that most modern tyre recommendations are for much wider rims than the sizes fitted to CMPs. For example the 16" rims that were fitted with 9.00-16 tyres were 6" wide, but the modern recommendation for 9.00-16s are rims minimum 6.5" or wider. Similarly, 11.00-20 are recommended fitted to 8" wide rims.
Specifying a flap for a 11.00-20 tyre will get you a flap suited to the modern recommended rim size and that might be too wide for the CMP rim. It is probably safer, for clarity, to refer to the rim width you are using when asking for flaps.