Hi guys, and I hope everybody is doing well. I have a 2024 Land Rover Defender 90 V8 Carpathian Edition that uses Continental tires in 275/45/22. I would like to upgrade to the tires the Octa uses, which are Michelin 275/50/22, or to a different tire size like the 285/45/22. Which one do you tire gurus recommend and why? My most important concern is to avoid rubbing. Thanks in advance

 

I'm in the same boat with this question - what are the disadvantages of running this tire: Michelin 275/50/22, instead of the stock tire: 275/45/22? I get that it is a bit larger in diameter but would it impact accuracy of the speedo?

 

275/50/22 will NOT fit on a standard Defender unless you are running lift rods or have a GAP tool to permanently raise the height. A regular Defender on air suspension cannot fit a tire over 32.6" unless you have mods.

OCTA has a wider track, and different suspension components to fit the larger diameter tires.

285/45R22 will fit no issue.

A 285/45R22 tire will read exactly 1 mph higher at 80 mph, and it will read 91.1 at 90 mph. Accuracy isn't off by much, and certainly nothing to worry about.

 

Thanks Cincy - this is great info! But I do have a question (I'm not a smart tire person - maybe not smart in general) I thought the first number 275 or 285 had to do with the width of the tire. The 45 to 50 number related to the height. Wouldn't changing between the 275 to 285 only impact the width and therefore not the diameter of the tire, so the mileage should remain the same between these two tire sizes? What am I missing here?

 

Because the aspect ratio is always a percentage of the width. It isn't a standard fixed number. In this case, the aspect ratio is 45 - so the sidewall is 45% of the width of the tire. 45% of 285 is more than 45% of 275, hence why it has more sidewall and a larger diameter.

 

275 or 285 is the width in mm, 40 or 50 is the sidewall ratio. So 275/50 22 has a diameter of (275mm x 50%) x 2 + 22". Yes it's an ugly mix of metric and imperial measurements. In this case it would be an overall diameter of 275mm ( 10.83") plus 22" (wheel diameter) for a total of 32.8".

I'll defer to @CincyRovers superior knowledge as to whether it would fit - I run 18" wheels with standard tires.

Edit: I see that he has already replied with the same info while I was typing this.

 

Wow - I had no idea tire numbers were so complicated! Thank guys for explaining this - I'm sure I won't remember this in the future and will just stick with the stock size tires, that's easier to remember.

 

I am running 275/60/20 Nitto Ridge Grapplers with zero mods to the truck. They work with no rub at any height. I had the dealer confirm compatibility and they did the install to assure there would be no issues. Ive been running them for over a year. Awesome tires. They are pretty quiet on the highway and for 4 wheelin they have been great.

 

Just put on a set of BFG Ko2 305/50/20 and be done.

 

any experience on 22? Thanks