255/80r17

I assumed this question has been asked a lot, but I can't find what I want to know for our 4 bangers. Has anyone gone from a 265/70r17 p-rated tire to either 255/75r17 c-load or a 255/80r17 c-load? I'd like to know any concernable differences in the driveability on hills. I commute 2k feet up a mountain every day for work, but I'd like the clearance for the trails I have. I have a 2017 2.7l with a 2" lift if anyone was curious.

 

I believe I have the 16” equivalent of 255 80R17 on my ‘14: 255 85R16, or skinny 33’s on about a +-2.5” lift.

I have regeared my truck to 4.88’s (I have the older 4 speed automatic transmission). I live in the hills/mountains and while I don’t commute with this truck anymore, I still drive it up to the mountains and it does decent after the regear but it is slow. 3rd gear for me is definitely used a lot for going up the grades.

When it was stock, the truck was my daily commuter for work - and again 3rd gear was used a lot going up the grades, so there’s that too. Going from stock to 33’s made the truck noticeably slower, especially from a stop, even with the regear. But at higher RPM, after the regear definitely helps the truck while on the highway. MPG dropped from 22-23 highway to 19.

 

Thanks man, if you were to regear your truck again would you do 5.29's or stick with the 4.88's? I purchased my truck with 265/70/17's, I have no idea what it was like with the stock size, so I don't know what to compare it to. The stance on your truck looks good, I dig it.

 

Thank you. I feel like I drive too much on the interstate to really want to run 5.29’s (at least for me) although I did think about for it a long time… a lot of my driving is going 55mph, but Nevada is a large state and doing 55mph with 65 speed limit in central nv is a little too slow for me on the highway.

there are some other threads that helpful in decision making here as well.

Here’s one that helped me a lot:
https://www.tacomaworld.com/threads/so-you-wanna-put-big-tires-on-your-2-7-powered-truck.622709/

Another suggestion is to search for builds similar to your truck as well as I believe there is a different automatic transmission and axle gearing ratio from the 2nd to 3rd generations.

Definitely not a one-size fits all. 33’s are heavy tires for the 4 cylinder ain’t no doubt.

There’s also gear ratio calculators to help see what range of rpm you’ll be running in as well.

When I was running stock sized tires, I was running BFG 245 75R16 in load range E for the majority of the mileage. A hefty tire compared to p-load tire.

 

I didn't really take into account hwy driving, which is 90% of my driving. I did a roadtrip to Colorado and back to Northern California (just on the other side of the hill from you), and my truck was at 5500 rpm going 80 mph on hwy 70 the whole way haha I mainly started this thread because I haven't found what I was looking for. I've spent a couple years searching this forum without much luck. I may just get the OTT tune, and a rear locker and call it good. I can't do too much after market stuff since I'm in California either.

 

I have the 4.0 and 33s and I felt the difference immediately. I drive up into the mountains a lot too going hiking and snowboarding.

I can appreciate the clearance of taller tires when in snow and mild offroading but honestly I'm probably going back down to 32s on my next set. I just don't want to mess with the drivetrain yet with regearing.. both my diffs are quiet and leak free with no issues. I dont really truly offroad much at all and I don't want to introduce any issues by changing stuff out.