Performance with bigger tires

I’m only on page 42 of the tire/wheel thread but I did search pretty extensively and didn’t get much info.

I’m wondering how much acceleration suffers in gas models when running larger tires, specifically 34s. I assume it’s not bad as there are many people happily running 35s… but I really enjoy how zippy the truck is and would run 33s instead of 34s if it meant avoiding a noticeable drop in acceleration.

I’m mostly asking regarding the change in gearing rather than weight. If I go 34s I will likely go with the Toyo open county AT3 EV 275/65r20 SL which are only 45 lbs!! Toyo actually lists 42 lbs but tire rack shows 45 and I’m inclined to believe that more since toyo also lists 42 lbs for the 275/60r20.

I know there will be a bit of a hit to MPG but I don’t think it’ll be terrible adding only 7 lbs per tire plus whatever increase between factory 18” and 20” (1794) wheels. If I went 33s I would likely get the Bridgestone Dueler Ascent AT in 275/60r20 which is only 41 lbs.

What’s been your experience?

Thanks!

 

I have no idea but I just bought some Goodyear wrangler duratrac RTs 265 70 R18. I hope they don't suck ass.

 

Our stock tires are a true 32.5 but are very light Falken AT3W are 38-40 lbs in 265/60/20 or 285/65/18. I keep eyeballing the new AT4W in 285/70/18 very close to a true 34 in a C Heavybuilt 6 ply rating but unless it's a typo weigh 69 lbs. That's a solid 25-30 lbs. additional unsprung weight per wheel...a hundred pounds. Gotta cost you at least 1mpg across the board, maybe 2. Roughly 3-3.5% effective gearing power loss to boot. But man would it look cool!

 

I’ve lost about 25 miles per tank with 35s.

62lbs/tire.

performance is still similar.
Turbos love load.

 

The Bridgestone Duelers H/T 265/50R22 OEM are great in cornering at good a clip,great MPH HWY and they would light up when you mash the pedal and all bets are off the table in wet or snowy conditions.

To have them on this truck in New England is just outright Redonkulas plus they look like rubber bands AKA bologna ( Balony skins) and you can feel every God damn pothole on any road & I swear they were pothole magnets.

So I changed to Yokohama Geolanders G003 MT @ 285/55R22 (34.75") weight is 63# MPG sucks, 17.8 is the best on HWY @ 70ish and 13 MPG City,they are 110% better in all weather conditions, softer on the road even on pot holes and exceptioal on the beach, deep sand and snow.

Best of luck in your search and let us know what you decide on

 

Hmm maybe they updated the sizes. Their only 265/60r20 is a load range E that weighs 58 lbs. They have a 275/60r20 SL but it weighs 48lbs. The 285/65r18 is a load range E that weighs 59 lbs.

 

Good to hear performance is the same with 35s! I didn’t think nearly 600 ft lbs of torque would be bothered too much by another inch or two of tires but I like to research things to death. 25 miles per tank isn’t bad for a 62 lb 35”.

 

Tire weight and travel load had me getting a power module from Stillen. Especially going down two lane highway and to bypass the turtles driver. The stock engine took awhile to go around. I'm running 37s on 20" wheels and I can't say if there was a performance difference. Baby pedal for first several month.

 

I'm a bit skeptical that 35"s only resulted in 25 less miles per tank. Most guys have reported at least a 4 MPG decrease, which would be more like 128 miles per 32 gallon tank

Personally, I think 35's looked too "stuffed" on a non-lifted Gen 3. I like a little space between the tire and wheel well. I'm running 33's and think they look about right. 34's are probably best from an appearance perspective, IMO.

I also don't like my tires to stick out beyond the fender flares because I spend a lot of time driving in sloppy road conditions...rain, snow, mud. Any stick out just flings road crud all over the sides of the truck.

Just my 2 pennies and a pocket full of lint.

 

I would have to agree. From seeing pictures I would be perfectly happy with 33s. But for just a few pounds more per tire I would go 34s for the additional 1/2” lift to get this thing off the ground a bit more (assuming it doesn’t sacrifice alteration). I also think 34s look more proportionate on a 20” wheel.

 

OP, I have a hard time deciding between Open County AT3 in 285/60/20 or 275/65/20. A part of me wants a little wider tire while the other part wants a little taller.

 

Just what I’ve observed.
YMMV (literally).

I am wanting to leave the OEM suspension alone. Had Foxes on my F150….and it was stiff.
This got my ground clearance and look.

‍♂️

 

I think that last bit (turbos and load) is something a lot of non-turbo guys don't realize or understand.
Especially the non-turbo truck guys that are shouting from the rooftops to re-gear it.
(Not necessarily this thread, but others.)

A little apples to oranges maybe but hear me out because it still applies:
A fast turbo street or racecar will always run a lower numerical gear ratio than a similarly fast NA car.
Why? Because the turbo(s) will build more boost at a lower RPM when subject to more load (less gear) and will frequently get SLOWER with more gear.

I'm not saying it's going to get faster with heavy tires. You can't cheat physics.
I'm saying the turbos will "compensate" a certain amount for the additional load and the performance loss won't be nearly as drastic as you might think. Or as much as it would be in a NA truck.

 

Oh it’s not gotten faster for sure. But yes, the truck is compensating for it with more boost duty cycle.

 

I had 35 bfg and am now on 37 wildpeaks (heavy). The jump to 35 was not noticeable at all, the move to 37 slowed it down a bit but still plenty of power when you need it. I average 17 mpg based on the dash read out and drive about 100 miles a day

 

Personally I would go for the 275s in the EV variety (no SL version in the regular). Little less contact patch for mileage. The 285s at 48 lbs aren’t terrible but I’ll take a lighter, taller tire.

 

Thank you! Just the feedback I was hoping to get. Cause I kind of have my heart set on the light 34s haha

 

I think the bfg ko2s measure a true 34.5"....I don't think you'll be disappointed or notice much power loss.... If any. Good luck

 

These are the tires I would have put on but at the time they didn't offer them in my size,I have been running these on my Chevy for almost 6 years now and absolutely love them.
Super quiet, plenty of meat on them and great in all weather conditions.
When it's time for a replacement of the Yoko's I will be putting them on for sure.

 

I put the 275/65/20 on mine and I think it’s the perfect size for my truck. I basically have the pro suspension and I have 0 rubbing and they tuck in just behind the fenders. I don’t like a lot of poke and throwing dirt and rocks down the side of my truck.

 

I have the goldilocks size Toyo OC AT3 P285/60R20 coming in @ 48 lbs. Just got them 2 weeks ago and MPG is 17.5 down from 18.3. Drives the same. Looks great IMO.

 

If they only made the 285/70/18 or 305/65/18 in a P or light C load range...looks good Paul!

 

Its not the size as much as the weight. I had worse performance/acceleration, MPG with heavy 33s than I do with lighter 35s.

Unsprung and rotation weight will make a big difference in performance.

So run the size tire you like, but pay attention to wheel and tire weight. Even reducing tire/wheels weight 5 lbs makes a noticeable difference! So check those tire weights that you are considering.

 

this size looks great and still what I’m leaning toward.

this size looks great too and fills out the wheel well nicely.

I just got done skimming all 181 pages of the tire and wheel thread and lots of people running light aftermarket 17s and 18s with some very heavy 35s and 37s!

this is primarily what has me leaning toward the 275/65r20 Toyo AT3 at 45 lbs (according to tire rack - Toyo lists it at 42 lbs). That’s fantastic for a 34” tire plus it’s three peak rated and highly regarded. The 285/60r20 at 48 lbs isn’t bad at all but for me, I think I go 1/2” taller and save a few pounds. And, at 33.5” I would be very tempted to instead run the 33” Bridgestone dueler ascent at 275/60r20 weighing in at less than 41 lbs!! And for that matter, the Toyota AT3 in 275/60r20 weighs only 42 lbs.

in the tire and wheel thread, a lot of people were getting the Nitto recon grappler in 275/65r20 (47.5 lbs) as it was the only SL option in that size at the time. I think if the Toyota AT3 EV in that size had been out at the time, it would have been very popular. The recon grappler isn’t three peak rated and is supposed to be not great in the wet.

 

Size, MPG and performance?

 

Stock SR5
265 70 R18

I haven't drove it to work yet. My round trip is 60 miles. Will report back on Sunday morning.

 

Little update with OEM wheels weights:

SR5 18”: 30 lbs
TRD OR 18”: 28 lbs
1794/platinum 20”: 38 lbs

My current stock setup weighs 68 lbs. A stock 1794 weighs 76 lbs

so I’m torn between:
275/70r18 (33.2”) Toyo AT3 EV on TRD wheels (powder coated in gunmetal) for a total weight of 71 lbs, or
275/65r20 (34.1”) Toyo AT3 EV on 1794 wheels for a total weight of 80 lbs

given the 34s would only be 4 lbs more than a stock 1794, I don’t think it would be noticeable. But on the other hand a 9 lb lighter setup would definitely be better. I prefer the 1794 wheels but I think the TRD wheels in gunmetal would look good. Here’s a photo of some powder coated black and bronze.