![tire size metric to standard calculator tire size metric to standard calculator](https://3.bp.blogspot.com/-eAOmEDyhr6g/VsjVvToKiOI/AAAAAAAAKi4/rPjke-pnEiA/s1600/tire%2Ba577.jpg)
Clear as mud huh? Somehow I think that this could have been made simpler like width/sidewall height x wheel size, but noooo, they had to throw in some math. Just remember when comparing sizes, as the tread width increases, so does the sidewall height, so if you want to maintain the same overall height you have to decrease the aspect ratio as the tread width increases. For comparison, the old Firestone Town and Country snow tires were a 78 series tire, maybe that's why they kinda looked right on a Jeep, so Gary to answer your question, in a modern tire you would be looking for a 153/75 R16 (somehow I think that would be a difficult size to find, but you never know until you look). Enter the numbers into this form in the order you read them from the tire and press Compute. For example a 265/75R16 would be around 31.6 inches tall. A 600 16 NDT comes out to be around a 75 aspect ratio. This formula is a nice way to get the tire diameter of those metric tires that are common on just about everything stock. Besides the exact tire size conversion from one system of measurement to another, calculator displays adequate actual/real tires with the dimensions which are. I think best way to approximate this would be to take a vintage tire, measure the tread and compare it with the sidewall height.
#Tire size metric to standard calculator iso
Although ISO (British Standard) basically uses metric units, the size of motorcycle chains is often.
![tire size metric to standard calculator tire size metric to standard calculator](http://www.maxxis.ie/media/100826/tyre-conv-chart_940x600.jpg)
I think the hardest part of the conversion is the aspect ratio, all modern tires have a xxxx/yy nn format where the x's are the width in millimeters, the y's is the height of the sidewall and is a ratio of x so a 70 series tire would have a sidewall height of 70% of the tread width. Offset/Backspacing Wheel/Tire Size Comparison and Clearance Tire Size Comparison Metric/Standard Conversion Bolt Pattern Metric to Standard. Speed 27 inch tire diameter on large sprocket 42.