Going Bigger - 5th Gen Tire Fitment Guide

[Jhalko]

I am trying to sell my brand new SR5 wheels and tires...... so I won't be extracting the TPMS sensors from them.....

That means, I would need to go and find new/used sensors! :Cry:

Tire shop can throw non tps in your old wheels, much better than buying new and reprogramming.

I run 42-44psi in my LT tires, there is lengthy discussion on yhis forum on the topic, one post has some math with it on why you increase pressure. Of you ask three tire manufacturers i bet youd get three different answers. [MENTION=113771]AudiTech[/MENTION]

http://www.toyota-4runner.org/engin...s/110299-lt-tires-need-more-air-pressure.html

 

[AudiTech]

Yeah I've poked through that thread a few times already (part of the conflicting info I've found)

I do realize different manufacturers will say different things, that's why I contacted the one who's tire I'm buying. I'll start at their recommendation and see how it feels and go from there.

Prior to moving to Colorado and buying this truck I've always had sporty small cars lowered with stiff suspensions and small sidewalls on grippy tires. The truck feels like fat mushy slug down the road. I personally don't see tire pressure, no matter where I set it, giving the truck a firm connected feel to the road.

I have to admit though. I'm super impressed with how well the X-REAS keeps the truck while cornering.

 

[Randyman...]

I personally don't see tire pressure, no matter where I set it, giving the truck a firm connected feel to the road.

Taken into perspective - of course it's not like swapping on a set or 20" wheels and low-profile tires But for me, 75MPH freeway driving is vastly improved by simply filling up the LT tires to 40-41PSI.

When I had the first set of KO's installed on this 'weighty beast' back in 2012, I immediately hated the soggy/spongy feel (but being my 7th set of KO's across three 4x4 Yotas, I knew how to resolve the issue). Went home, aired them up to 40-41PSI, and was immediately happy about 5 minutes later and not a dime shorter (well, I guess it cost a few cents in electricity to fire up the compressor! )...

MPG (and feel of "pep" off the line) will also directly benefit from lower rolling resistance resulting from higher PSI (and save you $$ in addition to giving you better handling / less slosh vs lower PSI).

I'd also be willing to bet evasive maneuvering above 25MPH or so can be improved with slightly higher PSI - but I'm projecting a bit there .

Only reporting my personal experience from my perspective. That's all I can do :cheers: The end call is obviously yours to make for your truck...

 

[AudiTech]

Don't take it the wrong way, I'm in no way trying to discredit your opinion or personal experience. I appreciate the input.

 

[AudiTech]

I picked up the tires during lunch, $796+tax for the set.


275/70/17 K02's compared to OEM 20s

 

[raynyc]

im checking out Falken Wild Peak A/T tires to put on my 2015 Trail. and by the specs off the site and comparing to the spread sheet i can get
AT01 LT275/70R17 32X11.0R17 32.6 tall 10.9 wide
has anyone experienced these on stock height?
this is a daily driver , probably wont see major off road use ever . i have an FJ80 for that.

 

[radicalwillie]

For what it's worth

Just thought I'd give a quick review of my replacement tires. I went with the Goodyear Duratrac Wranglers, in 255/75/17, speed rating S (112 mph), Load index 115 (2679 lbs.), inflated to 38 psi. These are on my '15 Trail KDSS with stock suspension.

The Good:
No Rubbing even at full lock
No noticeable increase in noise or vibration.
No noticeable change in mpg.
Excellent traction in all conditions I've encountered so far.
Relatively Cheap tire with good warranty and mileage rating.
They look fantastic.

The Bad:
At highway speeds, the tires can become a bit squirrely. Straight line driving is fine, but the tires don't track very well when cornering above 65 mph. At 80 mph, it is very noticeable and doesn't inspire a lot of confidence. Not sure if this is indicative of DuraTracs, or if its due to the narrower width, or a combination of the two.

Would I recommend them:
Yes and no. I rarely drive faster than 70, and don't rack up a lot of highway miles, so the handling issues are not a deal breaker for me. There are so many good traits associated with this tire, I am really happy with them. But, if the vehicle is to be driven on the interstate at high speed frequently, you might want to explore other options, especially if inexperienced drivers will be driving it.

I'd love to hear if anyone with 265/70/17 duratracs has experienced this higher speed instability.

 

[mo_mo]

I'd love to hear if anyone with 265/70/17 duratracs has experienced this higher speed instability.

I have less than a tank on my 265/70/17 duratrac LT-C. They were squirrelly when I first hit the highway but have since gotten better. Possibly the mold release residue getting scrubbed off.

How many miles do you have on them and do they rub at full lock with the wheel stuffed?

 

[radicalwillie]

Thanks for the reply mo_mo!

How many miles do you have on them and do they rub at full lock with the wheel stuffed?

I've got about 1500 miles on them. I haven't been at full lock with the "wheel stuffed", so I can't comment on that.

 

[The Waco Kid]

I found an intersting link, and I didn't see it already posted. Thought it might help someone at least start to visualize what's going on when you change tire or rim sizes.

Hope this helps someone.
Rim & Tire Size Calculator. Custom Offsets - Wheel-Size.com

Edit: The link should now have the Trail and Limited wheel spec's pre-populated. Sorry SR5 guys, the search funtion on the site didn't list y'alls.

 

[1engineer]

I found an intersting link, and I didn't see it already posted. Thought it might help someone at least start to visualize what's going on when you change tire or rim sizes.

Hope this helps someone.
Rim & Tire Size Calculator. Custom Offsets - Wheel-Size.com

Nice link!

 

[bleaches]

I found an intersting link, and I didn't see it already posted. Thought it might help someone at least start to visualize what's going on when you change tire or rim sizes.

Hope this helps someone.
Rim & Tire Size Calculator. Custom Offsets - Wheel-Size.com

This is great! does anyone have all the input values for this for a stock vehicle?

 

[1engineer]

Read the first post.

 

[bleaches]

Read the first post.

I did. I am referring to the fender clearance, suspension clearance, and wheel well clearance numbers.

 

[1engineer]

Ahhhh. Gotcha.

 

[The Waco Kid]

This is great! does anyone have all the input values for this for a stock vehicle?

I did. I am referring to the fender clearance, suspension clearance, and wheel well clearance numbers.

Ahhhh. Gotcha.

If I get the chance this week, I'll try and post up my runners measurements. :girl:

 

[RaginTxn84]

So I put in the OE measurements (just the wheel data, not the clearances) and then the new tire and wheel offset I'm going to, and the -10 offset put it at ~3.8" backspacing. The wheel spec says its a 4.1" backspacing - does that mean the back of the wheel is going to be 0.3" closer to the suspension? I couldn't get the offset and backspacing to match exactly the wheel I'm going to use (offset set at 0 got it close)

 

[The Waco Kid]

So I put in the OE measurements (just the wheel data, not the clearances) and then the new tire and wheel offset I'm going to, and the -10 offset put it at ~3.8" backspacing. The wheel spec says its a 4.1" backspacing - does that mean the back of the wheel is going to be 0.3" closer to the suspension? I couldn't get the offset and backspacing to match exactly the wheel I'm going to use (offset set at 0 got it close)

I can't really answer your question, but I noticed that too. I'm a complete newbie when it comes to wheel and tire calcs, so I just chalked it up to me being wrong or using the tool wrong.

After searching around some last night I noticed a few more websites with similar aides. I'll see if I can find one that allows for more adjustments later tonight.

I'm guessing here, but are you looking at the Countersteer Type X's?

 

[3wbdriver]

So I put in the OE measurements (just the wheel data, not the clearances) and then the new tire and wheel offset I'm going to, and the -10 offset put it at ~3.8" backspacing. The wheel spec says its a 4.1" backspacing - does that mean the back of the wheel is going to be 0.3" closer to the suspension? I couldn't get the offset and backspacing to match exactly the wheel I'm going to use (offset set at 0 got it close)

Yes. The higher the backspacing number the closer you will be to the strut. The lower the BS number the further you will be from the strut. Most 4R factory wheels have a 4.5" BS. That -10 number means you are pushing the entire wheel OUT about 3/8-1/2" (12.7mm = 1/2").

As far as I can understand it the +/- number is offset from a truly centered rim. For instance, my 17x8 wheels have a 4.5" backspace. This would equate to a ~+13 offset against a true 4" center. While a 9" wide wheel with the same 4.5" backspace would have a 0 offset. To add to your confusion I'm also using 1.25" Spydertrax spacers so I actually ended up with ~ 3.3" of true backspace on mine when all was said and done.

 

[RaginTxn84]

Thanks for that - quick question - getting my KM2s mounted today, no tpms - is that going to do anything to the way the truck runs (from the ecu), or am I just going to have the low pressure light on?