Hi all.
This may be a really stupid question but, what is the correct imperial tyre size for a 16" rim. I am sure the past owner changed from metric to imerpial and he has left me with a spare that has never been used. The problem is it is a different size to the ones on the road.
When I replace the tyre what size should I be looking for?

Cheers

 

Tyres on the road are 225/60/16
Tyre in the boot is 225/55/16

 

What 16" wheels do you have? Both of my XJ40s are on factory 15".

The 60's with the higher sidewall will give you a slightly softer ride, and will fill the wheel arches better.

For info, my XJ40s 225/65/15 Teardrop wheels.

 

'Metric' tires sizes were in world wide use long before your car was built, so I'm not sure what relevance the old system (H78-15 for instance) would have.

 

Yup, none of XJ40s came with 16" wheels but V12 versions as I recall .Mostly prolly your car's rims were upgraded by later models .

 

Thanks a lot for the information.
The previous owner has changed from the original 15" standard mags to 16" rims and hub caps.
Depending on my wallet I wanted to go back to the rims but I think I will have to put another set of 16"tyres on before I get the mages.