Slightly Wider Tires (245 v. 265)

I will be switching from the 245-75 to the 265-75 r16 later this month.

 

The only thing I can add is, when I had my four cylinder taco I had to run both summer and winter tires because of the severe winter conditions where I live. So, the 265s on alloys were my summer tires and 245 on steel with studded snows were winter tires. The moral of this is: If you get much snow, I would definilty stay with the narrower tire. They have significantly better snow traction given of course the tread design is the same.

 

I've been running 265/75 r16 bfg at KO E on my truck since 4 months after buying it. I noticed no significant decrease in mpg. My mpgs dropped however with the addition of lift and full skid plates and a tool box that is full of tools pretty much all the time lol

 

Were you running the stock P245/75/16 tires? That means +10 lbs per tire, 1" larger diameter, and 1" wider. If I were a betting man I would put my money on the tires dropping the MPG most significantly out of all the mods you speak of.

 

Yup went from stockers to these. The skids and the lift dropped the mpgs the most. When it was just the tires I was hitting 25 mpg highway consistently. Yes rotational mass and weight plays a part but the dead weight I now carry around has put me in the 18-20 mpg city range 22-24 highway. It'll get even worse when I put the 33" muds on lol and an rtt

 

Well congrats on that mileage that's better than advertised numbers on a stock 4cyl 5spd. I've been averaging 20-21 combined about 50/50 city and highway with bilstein 5100 lift and stock tires (P265/70/16 Rugged Trail). I have the 4cyl. automatic.

 

Auto will always have worse milage than manual. I mean my last tank I drove 576km, I did end up driving for 45 min on empty cause there was a big power outage, but I put in 72 liters the magical calculator tells me that's 22.1 mpg. I don't know what else to say other than in my experience simply going to 32's will not greatly affect the milage.

 

One thing I don't notice being mentioned on TW re the size/wt of a wheel/tire combo is the impacts of unsprung weight.

There will be an affect on ride quality, acceleration, handling (suspension wise more than grip) and potentially braking.

I know these are not 2300# sports cars that will pull around 1g on a skid pad with sticky street tires, but the principal of unsprung wt is the same. On my little solo II ride I could easily feel a 3# per corner difference..........

Even if the suspension is modified (and not by blocks or strut perches, but proper springs/dampers) to compensate for ride/handling changes, the other items are still affected.

There are many great reasons to go to a different size tire, style, wear rating or load rating. If you are picking the best tire for how you use the vehicle then any compromises of other factors are ok.

If you are picking a tire to just strike a better pose, that's ok too. Just be aware you may have some 'collateral damage'.

 

I was getting 23/24 MPG average before my lift and tire upgrade, with a high of 28 MPG, so I don't listen too much to "advertised numbers" either. Not with a regular cab, but with a DCSB Prerunner 2.7 auto.

My mileage was great until 265/75 ATs. Now it's only okay.

 

So all the EPA ratings are incorrect? Probably ought to write them about that.

I'm a manual fan in many cases. But an auto fan in many as well. And the truth is that in many combinations of vehicles across the board, autos get better MPG than manuals these days.

Sometimes it's better design, less driveline loss than in the past, and better gearing setups. The days of 'manual is always better on MPG' is long gone.

 

I don't think many in Canada pay attention to the epa and their ratings. Especially since there's no more emissions testing or inspections in BC anymore. A lot of it has to do with driving style as well. This is getting a little off topic now, op asked if 265's would greatly effect his milage and DD usage of his truck imo, no they won't.

 

I have the BFG KO in 265/70/17 load E, yes they are heavy, yes they will hydroplane my RC more, but at the end of the week you will not notice it at the pump. That being said, I look forward to getting some 255's.

 

After reading a ton of comments about tires, think i am going w cooper at3 load range c and stock tire size. My use of the vehicle doesnt warrant any more. Although i got wrapped up in a months worth of possible great tires reading here.