TSS 20" wheels: Tires 275/60/R20, or can I do 275/65/R20?

I got the gulf state TSS package on my truck. Still brand new but looking for an E rated tire since I'll be towing 6k miles per year. The 275/55/R20 stock Goodyear Duratracs are P rated, 32" diameter. I want a little more meat on the tire if possible but don't want to do any mods (eg. lift.) If I need to cut the skid plate that's fine but want to keep the mudguards.

Found the max tire thread:
https://www.tundras.com/threads/largest-tire-you-can-run-stock-for-all-generations.9762/

It seems to indicate I can safely go with a 275/60/R20 tire and not rub. That's 33" diameter.

There's a dead thread where people discuss the available space and it seems a 275/65/R20 tire would also work:
https://www.tundras.com/threads/275-60-r20-to-275-65-r20-on-stock-tss-sr5-wheels.24336/

It was never really concluded, user outdoorboy showed that it could be done but the OP never came back with results.

Anyone running the 275/65/R20 on 20" TSS factory rims? Tire is 34" (ie. one inch wider on all sides)

These:

 

You know my answer.

 

I've got the same wheels on the XP package (pretty much TSS for the Southeast), my local truck shop says 275/65s are too tall and I have a 2inch level.

 

What is your answer? No, I'm guessing. You have 275/55/R20, correct?


So this thread has the 275/65/R20 and the OP says they "fit" but had to remove the mud flaps
https://www.tundras.com/threads/275-65-20-34x11-fits-in-stock-suspension-and-wheels-fyi.48926/

 

I wonder when they went to Duratracs and dropped to a 275 versus 285. Maybe an availability thing? Mine has KO2s in a 285. I am close to needing new tires and I am going with the 275/65/20. I knew when I bought the truck that I wanted a larger diameter tire so I measured clearances. I did this when BFGs were new. I am up 2" on the front. From my measurements the mud flap behind the tire is close but will clear. The little air dam in front may have to go. I don't see the skid plate coming into play with a narrower tire but easy fix if it does. I tow a 5000 lb boat and NP with the BFGs.

 

Here's someone else with the 275/65/R20 but they have Bilstein 5100 on the middle perch:
https://www.tundras.com/threads/will-lt275-65r20-paired-with-20x9-work-with-my-setup.10533/


Should have mentioned that while I don't really have a "lift" I do have:
- Bilstein 5100 on the stock/low setting up front (+0.87 higher than stock)
- Bilstein 5100 in the back (likely very close to stock)
- Coachbuilder +1 shackles in back (+0.625 higher than stock)

So the truck isn't bone stock, just a hair higher, but maybe not enough to really help.

Let's pretend I go over to discount tire, are they going to give me grief if I push for the larger tire size? Any downsides with the 34" instead of just going with the safer 33"?

And I guess even a third option is 285/60/R20 which is a 33.7" tire.

Thanks in advance

 

Start a new thread asking?

 

The TSS rims have a +50 offset. I think you would have more rubbing than the mudflaps.

 

No, he was showing off his wheels in an unrelated thread. Go drink some coffee.

How does the offset affect it? (Noob question) Since this is a factory wheel, is that not taken into account?

 

I'm a Coke or Iced Tea man.

And I'm guessing that is not what he meant.

 

Wrong

What did you think I meant?

 

I was joking about starting a new thread. I figured you meant....

Did you read this? https://www.tundras.com/threads/lar...for-all-generations.9762/page-11#post-2096817

*******************************

Here's what I have figured out first hand when it comes to trying to cram a larger tire in than stock (even slightly larger)....nothing is guaranteed.

A lot of factors are in play, besides just tire size: Offset, tire maker, tread depth, truck differences (they aren't calibrated to Swiss Watch maker standards)

So even if a Forum thread says they'll fit, they may not fit. The good news is, almost any amount of "small rub" will be easily fixed in your driveway with a little time and no cost.

 

I have a texas edition tundra which came with the same size wheels as the tss wheels (20x9 +50mm offset) and I ran 295/55/20 ridge grapplers (I only had to remove the little spats on the front liner):



You could also try:

• 275/60/20
• 275/65/20
• 285/60/20
• 295/60/20

Of course, the larger you go, the more trimming that you will have to do. The 295/60/20 might be able to fit, but it will be very close to the upper control arm. Here is the 295/55/20 ridge grappler on your wheel size. If you went to the 60 series with that tire, it might rub the UCA. However, if you picked a different tire brand, it might fit fine:



Unless you are running a 2-3 inch lift, I would not go any taller than a 34" tire. 33" tires should fit just fine, but 34" tires will require more trimming. Here is what I did to fit the 295/60/20's while still keeping the mud flaps:

Trimming front bumper liner and mudflaps | Toyota Tundra Forum (tundras.com)

However, I now have wheels with a lower offset than the tss wheels. Here is what a 295/60/20 ridge grappler looks like on a +20mm offset wheel



The tss wheels are +50mm offset so they will stick in about an inch more than the pic above. This means that they will require different amounts of trimming to fit a larger tire.

Picking a tire, wheel, and lift combination can be maddening. There are so many combinations that it can make your head spin.

You could also raise your 5100's to the second setting to give you a little more room (That's what I had with the 295/55/20's). And find a tire shop that will work with you. A reputable shop should be able test fit a tire for you.

You can checkout my build threads to see more pics and descriptions:
Netmonkey's build thread | Toyota Tundra Forum (tundras.com)
Netmonkey's build thread 2.0 | Toyota Tundra Forum (tundras.com)

Good luck

 

Thanks all.

Took some measurements. With the stock 275/55/20 tire it seems there is about an inch of clearance everywhere: front air dam, back mud flap, upper control arm.
The factory sway bar has even more space, can't see it being an issue.

This also means I'm _really_ pushing it if I force a 275/65/20 in there. I don't know who anyone is doing it with a stock setup. Lifted, yes. Not very excited about this option any more, speedo error is also quite large ("But officer, I was only going 70, I swear!")

275/60/20 seems like the only viable option without a commitment to hack/change things as necessary.

 

It looks like you will be ok and at most, removing flaps and maybe pulling the front liner forward (I had to do this).

My shop put my larger tires on, no questions asked and didn't even tell me they were rubbing. I didn't find out until I left and made a few turns.

As @Netmonkey it can be maddening trying to figure out what will fit. I read mine would fit, so we bought and found out they rubbed. Not a huge deal, and it was a project to make them fit. I read and read and read and read. We finally just bit the bullet and order what we liked best and made them fit.

 

Somewhat interested in the 285/60/R20 option. Reasons:
- It's physically sized 33.5", hence provides a quarter inch clearance on all sides without trimming
- Someone mentioned that the stock tire used to be 285 wide anyway

 

When I went up to 295/55/20, my speedometer matched my speed exactly (the 275's actually made the speedo show a faster speed than I was going). When I went up to 295/60/20, the speedo is now off by 3.3%. This means that if the speedo reads 60 mph, then I am actually going 62 mph. I wouldn't worry about speedometer inaccuracies. It is negligible.

From your measurements, you have lots of room for a larger tire and you can remove that front spat to gain even more clearance. With a small amount of trimming, you can accommodate a good sized tire.

This is a pinky's width of clearance (about 1/2"). As long as the tire clears, you are good:


I think we live fairly close together. If you want, you can come checkout my truck and the modifications that I did to accommodate the tires.

 

Decided to go with the 'safe' option of 275/60/R20:
- No doubt about rubbing
- Smaller tire is better for towing (ie. minimal impact on gear ratio)
- $60/tire less expensive than the 285/60/R20, and 275 is wide enough for me.

Ordered @ discount tire, will have them in a few days. Tire rack and other online places had the same price.

 

post some pics when you get the new tires. Let us know how much clearance you have left or how much trimming you had to do.

 

Which brand did you go with?
I noticed alot of the 275/60R20s are not LT rated..

 

Cooper AT3 XLT:
- Kind of a hybrid between an AT and freeway tire, expecting less noise
- Great review
- True E rated tire

https://us.coopertire.com/tires/discoverer-at3-xlt

 

So yes I got the 275/60/R20, it was the 'safe' option. After install I took a pic of the clearance to the front air dam, turns out I could have easily run the 275/65/R20 instead! Kicking myself a little for having chickened out.

Oh well, after a couple years these will be worn out and then I'll be facing this same decision again. If the current 33" set tows well maybe I'll get the 34" next time.

In the meantime, anyone with the TSS edition Tundra should go ahead and try the 275/65/R20.

Clearance at full lock with 275/60/R20, there's a good half inch

 

You made the right choice..
The 275/65/20 would have probably rubbed.
You say you have a 1/2 inch to spare, well that next size up would fill that 1/2 inch.
You also have to consider the body moving up and down on the suspension.

My TSS came with 285/55/20 KOs.
When I bought my 275/60/20 KO2s a couple years ago I did extensive research on the 2 sizes you considered.
The 275/65/20 was really iffy from what I read.
Many had rubbing in reverse with the steering wheel in full lock.

Besides that, I my DT guy put a 275/60/20 and 275/65/20 side by side.
The 275/65/20 looked too skinny being an inch taller.

I'm getting tires in a few months and I'll be going with the 275/60/20 again.

 

Great info, thank you

 

I would stay shorter if towing 6k miles per year

 

Thanks. Yes, towing performance is important to me. There's a thread where someone is complaining about lack of performance with his big tires compared to his buddy with the stock size. I figure 33" is a good compromise - slightly bigger, still fits without issue, only a couple MPH in speedo error.

 

Ive got 2"/1" lift 4x4 and I run the 20" 1794 rims and I have rubbing when cut 85% one way or the other. Other than that I dont have problems. Michelin ltx a/t2

 

I am getting these I think soon. I am at 40k on stock crap tires and they show every mile. I was quoted at 950 out the door for 4... in CA. I guess there is a special on the tire right now.

 

All great info regarding the tire size. I'm currently debating the 285/60/20 vs 275/60/20. The Cooper AT3 tires look good. My truck has the stock Dunlop Sport 5000 tires. They are junk in wet conditions and on gravel.

 

I didn't do the XLTs. I went with the 4S... I don't do a ton of off-roading (really, none) so wanted a decent AT that was good on pavement. the AT3-4S so far has been nice and quiet and drives close to the stock.