Both tires are practically of the same diameter. There will be no noticeable effect in power/acceleration.

 

Are you going up in size from the stock 235/70? If so you will notice a loss in power/performance. Leadfoot is correct that both 235/85 and 265/75 are the same diameter, width is the big difference. Only way to compensate for the power loss to larger tires is to install lower gears in the axles. Both the 235/85 and 265/75 are common on lifted D1s. If you don't have a lift the largest tire you can run without rubbing is a 245/75. Any time you put larger tires on a vehicle it increase the strain on the drivetrain, particularly the axle shafts. You should be fine with stock axle shafts with either of the tire sizes you're looking at unless you start going for the extreme off-road.

 

The 245/75/16 tires are for the most part just 10ply so weight is alot.

 

A 265 will cost you 1.5 MPG in town, slightly less at highway speeds. You will experience a great low end loss of power.
245's make a nice compromise.
Do you have a lift on your truck?

 

Sanity Check: Hello fellow LRFers, I think I am looking for a dose of common sense. My '96 DI has been moved from 3rd car parked outside in Sunny CA to a daily driver. I recently picked up a nail in my 235/70/16 Michelin LTX M/S and was told it could not be repaired. The problem is that the tire has too much sidewall cracking (from sitting in the CA sun too long?) All tires have plenty of tread and only two of the 3 have sidewall cracking issues. I was thinking about swapping the 275/70/16's off my wife's '00 Toyota Land Cruiser and putting fresh tread on that car but after reading this thread I'm wondering if that is such a good idea.

It seems that I will have to do a fair amount of trimming and tuning of bump-stops to make this work. I also see it will ding the turning radius and mileage by 1.5 mpg as well as add additional strain to the drive train. While it is a DD now, it will go back to 3rd string before we give it to our daughter to drive in a couple of years. I'm thinking this may not be a good plan but wanted to check with like-minded yet more experienced Forum-friends before I bought anything. The alternative I am seriously considering is replace the 2 effected tires with the same tire and have one less thing to worry about...

As much as I may have answered my own question while writing this, I appreciate your thoughts.

Best regards and Happy Holidays!

Tom

 

That is about a 31.5" tire. Is your truck lifted? You will need hub spacers to keep your stock turning radius and at least chop off half your mudflaps and a good chunk off your wheel wells and bottom corners of your bumper. I would not worry about the extra strain but you will lose a bit of MPGs. My thoughts are its only plastic so chop it up.