Bedford Tyres question, Pre WWII.

[Bruce Parker (RIP)]

Originally Posted by Terance Wong

I come across these two data. May I know what are their meanings please?
And how to convert them to some standard, such as 38 x 7 ins (965 x 178mm), please?

１）Bedford O series : Tyres 10.50 - 16

２）Bedford W series : Tyres Size - Front 6.50 x 20

Thanks

Those dimensions are in inches and refer to the width of the tire (or the rim) at the bead and the larger number is the diameter of the rim (or inner diameter of the tire). What it doesn't tell you is the overall outer diameter of the tire or its maximum actual width. Those could vary a little bit depending on the tire. There may be some chart I'm unaware of that correlates the rim width and diameter measurements you've shown to the actual tire dimensions.