tire question

[mntlion]

Truck/car tire Jong question

I have 215/80 R15 on my truck right now and they are full winter tires that came with it. Summer is here (almost) and time for some all seasons till October. I beleive that the tires are a bit smaller than "stock" and I want something larger anyways.
soooooo
what size can I go up to and still for the 6 bolt Toyota rims ((Type 6JJ?)
P235/75/r15?
31*10.50R15?

Just that they aer on sale in the city and I'll order they and get them put on this weekend.

I know that this change will effect the speedo and the RPM vs speed, but with a 2.4L desiel truck speeding isn't much of an option anyways

Not looking for monster truck size and lift, just a bit bigger and 90% hyw, 5% city, 5% off road.

[Spamhelmet]

Get any type just not the BF Goodrich AT tires, unless you drive offroad/gravel/dirt more than 90% of the time.
They are utterly and completely shite.
Unless you offroad offcourse, when they rule.

Sidewalls are thin (235/16 at least) so they are wobbly (with heavier cars).
Grip on a wet road is... speechless...none existent. To put it in the skier terms: like a dull, raped, coreshotted blue noodels on blue ice.

I rest my case.

Ps. Still shaken of yesterdays near accident...

[CantDog]

Also, if you put on larger tires on your truck(31s or something) then you are going to affect the gearing(go from 4.10 to a 3.73 or similar), which will already make a slow vehicle even slower.

[schuss]

if its a toyota truck, they should fit 31's pretty much no problem. And that little of a jump won't effect gearing or whatnot enough to be a problem. If you jump to 33's or something, then yes, but 31's aren't that much bigger. 30x9.50 is another option, and 235's should fit fine under a yota.

[Viva]

Either of those sizes ought to fit onto a stock Toyota rim.

Whatever tires you get, look for LT (light truck) rated and not P rated. The LTs will have more plies and give a stiffer ride and under normal driving (on or off road) are not nearly as prone to puncturing.

[Arty50]

I'm on my third pair in 10 years, and I love these tires. I will admit they're not great in the rain, but for dry pavement they're perfectly fine. Any AT tire with this type of tread (and there are a lot) is going to suck in rain though. For rainy performance you need to get something with a much less aggressive tread. But then you're basically talking about a car tire on a truck. Plus Michelin bought out BFG and made some improvements to this tire. The newer NKO versions are made by Michelin. Mine are fairly new and so I haven't been in heavy rain with them yet. So far I'm lovin' them still.

Originally posted by Spamhelmet
Get any type just not the BF Goodrich AT tires, unless you drive offroad/gravel/dirt more than 90% of the time.
They are utterly and completely shite.
Unless you offroad offcourse, when they rule.

Sidewalls are thin (235/16 at least) so they are wobbly (with heavier cars).
Grip on a wet road is... speechless...none existent. To put it in the skier terms: like a dull, raped, coreshotted blue noodels on blue ice.

I rest my case.

Ps. Still shaken of yesterdays near accident...

[schuss]

For the use this truck will get, AT's just don't make sense. Something like the long trail T/A or some generic LT's would work fine. Look for increased load rating (I think C or D would be appropriate for this size) as those are meant for commercial truck use and wear like iron.

[mntlion]

Thanks guys

First number is the extra height of the tread and the second is the width vs the height?

so the P235/75/r15 vs my 215/80 R15 The new ones are a bit heighter and a bit narrower?

31*10.50R15 are a bit bigger both ways?

I assume that the 31* 10.50 R15 is just 105 vs 80?

[mntlion]

http://www.1010tires.com/tiretech.asp


great info.

Passenger Tire sizing is typically displayed as:

P215/65R15 89H

The "P" stands for "P-Metric" or "Passenger". This means that it is a North American tire sizing designation. European tires typically don't have the "P" attached to the size. Tires with higher ply ratings will generally start with "LT" which stands for "Light Truck". This indicates the tire is an LT metric and will always have a Load Range indicated. It is important to note this for vehicles that call for LT metric tires. Never substitute a P metric tire for an LT metric tire, even if all the other dimensions are the same.

The "215" is the width of a tire, also known as the "section width". This is the width of the tire in millimeters at its widest point from sidewall to sidewall when mounted on the recommended rim width. The actual tire width can vary depending on the rim width it is mounted on.

The "65"is known as the Aspect Ratio. It is calculated by dividing the section height by the section width and multiplying by 100. (In this example, the sidewall will be 65% of 215)

The "R" stands for Radial, meaning it has a radial construction. Radial tires have ply cords that extend to the beads and are laid at 90 degrees to the centerline of the tread, the carcass being stabilized by a circumferential belt. Other possibilities include "B" for belted construction and "D" for diagonal construction. This means the ply cords extend to the beads and are laid at alternate angles less than 90 degrees to the centerline of the tread.

The "15" stands for the diameter of the wheel in inches. This is the exact size that this tire will fit. There are some older rims called "TRX" which are metric measurements like 390. You CAN NOT mix TRX rims with regular tires or vise-versa.

The "89" is the load index

The "H" is the speed symbol.

[rightcoast]

word...good advice in the above post.
IMO, i love the BFG AT KO. I had a set of 30x9.5x15 on my jeep drove them all winter for 3 years and loved them. Im running 32x10.5 on the jeep now, summers only, and they rule, never had a problem in rain, and they do kill it off road.
i know other people who have hated them too...i dont get it. the long trails are nice too. also ive hear good things about the dunlop AT...whatever its called.
back to the ? 31x10.5 should fit on your truck no problem , make sure you have enough so as not to rub on your frame at full steering lock...thats annoying.
<edit>2nd of the night...how am i doing...as far as the sidewalls, i believe all BFG AT's have a triple layer sidewall. they call it tri-guard or something. much thicker than michelin, good year, etc.

disclaimer~ I am not a hick, i swear.

[wahama88]

I'll share the same comment with Arty50 on the BFG All Terrains. I had a brand new pair put on last year on my 1999 Toyota 4Runner. They are 265/17's. They are pretty beefy, but not bulky at all. I drive alot of highway miles (I put on 20,000 this year). The key is to rotate and balance and they will last you longer than most tires on the road. I take my truck four wheeling quite a bit, seven mile road and slaughter Ridge Road in Colorado. These trails aren't the Rubicon, but they have handled everything I have thrown at them. I swear by the tires and would have a tough time considering anything else. You can save money and get cheaper tires, but the best investment is in BFG All Terrain KO

[mntlion]

The 31*10.50R15 are wider, a lot wider, do I have to worry about that not fitting the rim?
From a mtn bike stand point some thin XC rims dont take wide DH tires?
Same thing with auto?
or is this close enough?

just that the site www.1010tires.com showed the rim differences as

Rim Width Range: 5.5 - 7 in for the 215/80
Rim Width Range: 7 - 9 in for the 31*10.50

Section Width: 8.46 vs Section Width: 10.51 in

Any more advice about this?

[rightcoast]

how wide are your rims? i know ive seen 31x10.5's on 7inch Jeep rims before. You might just want to go with the 30x9.5 if its a concern, theyll look beefy enough, and like you said, youre not really concerned with ground clearance,etc.

[Arty50]

Originally posted by wahama88
The key is to rotate and balance and they will last you longer than most tires on the road....You can save money and get cheaper tires, but the best investment is in BFG All Terrain KO

This is exactly why I'm on my third set. My previous 2 sets lasted just over 60k miles each. Most off-road tires only last 40k. Commercial truck tires last a long time too though.

As for my previous comment on rain performance, I have an old Jeep CJ-7. It's not the heaviest or longest vehicle on the road and so I don't expect it to stop on a dime, especially in the rain. So, I don't think my choice of tires will affect this much. Most Jeeps I've ridden in don't like rain, no matter what tire is on there. So take my comments for what they're worth.

[splat]

Mtnlion - I have 235/75/r15 on my grand cherokee. Buy somewhere that'll rotate free every 5K and you can do 80K on them. Otherwise the tread cups, moreso if you have an aggressive tread.