Predictions: Bigger Tires?

[Jetboy]

I'm not sure if I can even find the spec sheets for both tires since they're both discontinued. If you can find two of them and mount them up - I think you'll find that in real life the nominal sizing doesn't exactly match the actual size. The current AT3 LTX isn't the same tire as the older AT3. Not sure if they're the same casing or not.

But it's also just a simple mathematical proof that some 275s would be wider than 285 nominal sizing on the same wheels. That's true even with true to spec sizes using Cooper's own info. Cooper measures 275 width tires on 8" wheels and 285 width nominal sizing on 8.5" wheels. Cooper appears to set the cutoff between 11.2 as 275 and 11.3 goes to 285. There are plenty of examples of both in the current cooper spec sheets. And 11.2 section width on an 8" wheel will be 11.4" on a 8.5" wheel. 11.4" is greater than 11.3" section width measured on an 8.5" wheel.

And just looking at Cooper specs of current tires, there are some that don't hold to that cutoff. For example the STT 285/75/17 has a section width of only 11.1 measured on an 8.5" wheel and the same tire in a 275/65/20 is also 11.1, but measured on an 8" wheel. So the 275 is roughly 0.2" wider than the 285 in the the STT Pro currently. And a 265/70/17 is spec at 10.9 on an 8" wheel. That would be 11.1 on a 8.5" wheel - so in that case the 265 is identical to the 285 width depending on which one you pick. Just the nature of nominal sizes vs actual sizes.

 

[Corbet]

I’ve noticed this anomaly shopping tires with cooper recently. This is for my Subaru Impreza. You can see below the smaller 215 has a larger section width than the larger 225. Makes no sense but both are on 7” wide wheels. In my case a 225 Falken Wildpeak is rubbing ever so slightly so I’m looking at 215’s this time. Starting to wonder if the molds for both tires are the same but they position the belts slightly different to give the tire a different shape. I know nothing about tire manufacturing, just thinking it’s probably cheaper to have less molds if other variables can be adjusted.

 

[hoser]

I'm not sure if I can even find the spec sheets for both tires since they're both discontinued. If you can find two of them and mount them up - I think you'll find that in real life the nominal sizing doesn't exactly match the actual size. The current AT3 LTX isn't the same tire as the older AT3. Not sure if they're the same casing or not.

But it's also just a simple mathematical proof that some 275s would be wider than 285 nominal sizing on the same wheels. That's true even with true to spec sizes using Cooper's own info. Cooper measures 275 width tires on 8" wheels and 285 width nominal sizing on 8.5" wheels. Cooper appears to set the cutoff between 11.2 as 275 and 11.3 goes to 285. There are plenty of examples of both in the current cooper spec sheets. And 11.2 section width on an 8" wheel will be 11.4" on a 8.5" wheel. 11.4" is greater than 11.3" section width measured on an 8.5" wheel.

And just looking at Cooper specs of current tires, there are some that don't hold to that cutoff. For example the STT 285/75/17 has a section width of only 11.1 measured on an 8.5" wheel and the same tire in a 275/65/20 is also 11.1, but measured on an 8" wheel. So the 275 is roughly 0.2" wider than the 285 in the the STT Pro currently. And a 265/70/17 is spec at 10.9 on an 8" wheel. That would be 11.1 on a 8.5" wheel - so in that case the 265 is identical to the 285 width depending on which one you pick. Just the nature of nominal sizes vs actual sizes.

AT3 Specifications


The specs are right there. Both measured on 8" wheel. The 285 shows as 1/2" wider at the section. You're saying the 275/60R10 is 20mm on the same rim. That's a ~1.25" discrepancy.

 

[hoser]

I’ve noticed this anomaly shopping tires with cooper recently. This is for my Subaru Impreza. You can see below the smaller 215 has a larger section width than the larger 225. Makes no sense but both are on 7” wide wheels. In my case a 225 Falken Wildpeak is rubbing ever so slightly so I’m looking at 215’s this time. Starting to wonder if the molds for both tires are the same but they position the belts slightly different to give the tire a different shape. I know nothing about tire manufacturing, just thinking it’s probably cheaper to have less molds if other variables can be adjusted.

View attachment 3580873

Is this the exact tire? These specs are from the Falken Website:

 

[Corbet]

Is this the exact tire? These specs are from the Falken Website:View attachment 3581033

That's what I'm currently runing as a summer tire after lifting my impreza limited. The original 205/50r17 winter tires are on thier last season so I've been looking at 215/55r17 winter tires in an effort to not rub as long as give more clearance for snow.

 

[Jetboy]

View attachment 3580927

AT3 Specifications
View attachment 3580930

The specs are right there. Both measured on 8" wheel. The 285 shows as 1/2" wider at the section. You're saying the 275/60R10 is 20mm on the same rim. That's a ~1.25" discrepancy.

It's neither here nor there to me if you believe it. I owned them both, put them side by side, took pictures of them. I'll stick with what I find in the real world. You can believe what you'd like.

 

[AgentOrange]

It's neither here nor there to me if you believe it. I owned them both, put them side by side, took pictures of them. I'll stick with what I find in the real world. You can believe what you'd like.

I think you both are looking at two different measurements. In that photo of the 3 tires side by side, that 275 definitely has a wider tread width, but not necessarily a wider section width. Note the more squared off shoulder on the 275 vs how the others round off more dramatically. I wish all tire manufacturers would list both as they both impact the tires we choose and the reasons why

 

[hoser]

It's neither here nor there to me if you believe it. I owned them both, put them side by side, took pictures of them. I'll stick with what I find in the real world. You can believe what you'd like.

That's what I was saying. See post #40. If the manufacturer is indeed misrepresenting the size by as much as an inch, you or anybody could easily have a class action lawsuit.

I think you both are looking at two different measurements. In that photo of the 3 tires side by side, that 275 definitely has a wider tread width, but not necessarily a wider section width. Note the more squared off shoulder on the 275 vs how the others round off more dramatically. I wish all tire manufacturers would list both as they both impact the tires we choose and the reasons why

I'm clear on section width vs tread width. Fewer and fewer manufacturers are listing the tread width dimension but Tire Rack still does it when they have the info.

 

[Jetboy]

I think you both are looking at two different measurements. In that photo of the 3 tires side by side, that 275 definitely has a wider tread width, but not necessarily a wider section width. Note the more squared off shoulder on the 275 vs how the others round off more dramatically. I wish all tire manufacturers would list both as they both impact the tires we choose and the reasons why

I know what a section width is. I'm confident that the section width is narrower between those two tires on the 285. It's a nominal size. You can see in tire sizing that some nominal 285s are currently narrower than 275s even on the spec sheets.

That's what I was saying. See post #40. If the manufacturer is indeed misrepresenting the size by as much as an inch, you or anybody could easily have a class action lawsuit.

I'm clear on section width vs tread width. Fewer and fewer manufacturers are listing the tread width dimension but Tire Rack still does it when they have the info.

What would you suggest the damages are for a tire varying from the spec size?

 

[hoser]

False advertising. The advertised product is different than that actual measurement using the exact measuring standards. The consumer, like myself, certainly makes a purchase decision based on those dimensions. What if my tire clearance to UCA was 1/2" with my tire chains. New tires that are 1" wider than advertised at the section would certainly cause issues.

 

[Jetboy]

I think it would be very challenging to find a class of people who were damaged by a tire that was a bit narrower than spec and had collective monetary harm to justify a class action law suit. "Did you buy 286/75/17 cooper AT3s between the years of 2017 and 2020? Did you find you had extra clearance to the upper control arm? If so - you might be entitled to monetary damages. Call this number to speak with a licensed attorney."

Incidentally - the 275s in my case did rub slightly on the upper control arm where the 285s did not without spacers. But the HT+ had +12mm offset wheels and the AT3s were +15mm.

 

[hoser]

The damage is monetary. I chose this product based on advertised size.

Who doesn't choose a tire decision based on advertised size?

 

[LCinMaine]

This is probably not the right thread, but I'm looking for a link to the bronze "phone dial" wheels that Icon is/has used on it's FJ's-including their new 500th build edition?

 

[Corbet]

This is probably not the right thread

Correct

 

[Gurv522]

On the FEs, from the first images of the units coming off the boat into Portland, it appears that they're equipped with the Michelin LTX Trails. This is the same tire you'll find on the TRD OR trims of the Tundra, and I think maybe on the new Taco. This is a relatively new tire from my understanding. I think the Tundra forums have some info on these, and it seems like it's a road-focused AT tire with somewhat crappy tread life.

Can't tell the sizing from the pictures, but Michelin's site states these tires only come in one size at the moment - 265/70R18. That would equate to a 32.6" tire with a 10.7" width. I think this is eerily similar to the dimensions on the Toyos coming on the GX.

If we can find a 17" that will fit over calipers (should be possible, GX OT comes with 17s), 255/80-17 should fit the spare tire compartment - it's only 0.5" taller and 0.7" more narrow. For the folks wanting the meat, 285/75-17 (34) may be a bit trickier, it's 1.2" taller and 0.6" wider, however, I don't think it'll rub in the well.... The question is whether it'll fit in the spare compartment. Given the car will ride 0.6" higher due to the larger tires, it's a wash on the ground clearance, however, we won't know if the larger diameter will fit under the car. Really hope Toyota thought this out. Maybe someone can take some measurements at an upcoming car show, or at the press event in April.

I am definitely curious on how the taller tires will play with the hybrid system, and whether a re-gear will be needed.

 

[Phillyd2]

Could be just a mistype but the OT comes with 265/70r18 tires

 

[Jetboy]

On the FEs, from the first images of the units coming off the boat into Portland, it appears that they're equipped with the Michelin LTX Trails. This is the same tire you'll find on the TRD OR trims of the Tundra, and I think maybe on the new Taco. This is a relatively new tire from my understanding. I think the Tundra forums have some info on these, and it seems like it's a road-focused AT tire with somewhat crappy tread life.

Can't tell the sizing from the pictures, but Michelin's site states these tires only come in one size at the moment - 265/70R18. That would equate to a 32.6" tire with a 10.7" width. I think this is eerily similar to the dimensions on the Toyos coming on the GX.

If we can find a 17" that will fit over calipers (should be possible, GX OT comes with 17s), 255/80-17 should fit the spare tire compartment - it's only 0.5" taller and 0.7" more narrow. For the folks wanting the meat, 285/75-17 (34) may be a bit trickier, it's 1.2" taller and 0.6" wider, however, I don't think it'll rub in the well.... The question is whether it'll fit in the spare compartment. Given the car will ride 0.6" higher due to the larger tires, it's a wash on the ground clearance, however, we won't know if the larger diameter will fit under the car. Really hope Toyota thought this out. Maybe someone can take some measurements at an upcoming car show, or at the press event in April.

I am definitely curious on how the taller tires will play with the hybrid system, and whether a re-gear will be needed.

37s fit on the new Tacoma with some rubbing, but clear the body mount. So we're talking basic trimming to run 37s. 35s are just install and go. If the LC doesn't fit 34s easily, that'll be a surprise to me.

 

[Corbet]

I'm really hoping 285/75r17 fits as a spare

 

[Jetboy]

I'm really hoping 285/75r17 fits as a spare

Seems unlikely to me based on the layout of the exhaust. Possible, but it looks pretty tight underneath.

I'm okay with a smaller spare. It's so rare that I get a flat. I still need it to be a full capacity tire, but I'm fine if it's an inch shorter. Only big hangup I have is that is AWD and I'm not sure how the system will handle that. On a Tacoma or 4R, you'd never know from the driver's seat that you have a mismatched height tire.

 

[tacoshawn]

Seems unlikely to me based on the layout of the exhaust. Possible, but it looks pretty tight underneath.

I'm okay with a smaller spare. It's so rare that I get a flat. I still need it to be a full capacity tire, but I'm fine if it's an inch shorter. Only big hangup I have is that is AWD and I'm not sure how the system will handle that. On a Tacoma or 4R, you'd never know from the driver's seat that you have a mismatched height tire.

With the front and rear diffs being an open diff the truck normal operations won’t be affected by the temporary figment of the factory sized spare.