Different oem tire sizes

[88mike]

Hello everybody, so I got a 2014 z71, still looking for a ppv or ssv, I already know about the difference in speedometer readings if the overall size of tire being smaller or bigger. This z71 comes with 265/65/18, id like to swap for a low profile like the 265/60/17, but didn’t wanna have to mess up with reprogramming the computer to show the correct speed. Also kinda would be spinning more the wheels to get to a place.
Anyways my
Question is, is the handling response same if using the 265/65/18 and 275/55/20 comparing it to the ppv size tires 265/60/17?

 

[Joseph Garcia]

I cannot help you with a PPV handling comparison, as I've never owned one.

You can go to TireRack.com and compare the overall diameter of various tire size/profile options that will preserve your speedometer/odometer options, and avoid reprogramming. For my 07 Yukon XL Denali, the stock tire size is 275/55x20, and when I purchased it, it had 275/60x20 tires on it. Ultimately, I converted to 305/50x20 tires with no rub or wheel well modifications, and they have about the same overall diameter as the stock tire size (the Tire Rack spec page was helpful in determining an overall tire diameter to restore my speedometer/odometer correct readings without reprogramming).

If handling improvement is what you want, in general, a lower profile tire will handle better. Good shocks and suspension/steering-related bushings in good working order are essential. To really upgrade handling, get yourself a set of front and rear Hellwig sway bars, and you will have a great handling truck (for a truck, of course). In my test cloverleaf (I always want to see definitive tangible results in any mod that I make), I was able to gain an additional 5mph going around the curve, with VIRTUALLY NO body roll. They are pricey, but totally worth if, if you place high value on handling.

 

[Marky Dissod]

... got a 2014 z71, still looking for a ppv or ssv, I already know about the difference in speedometer readings if the overall size of tire being smaller or bigger.
This z71 comes with 265/65R18, id like to swap for a low profile like the 265/60R17,
but didn’t wanna have to mess with reprogramming the computer to show the correct speed.
Also kinda would be spinning more the wheels to get to a place.
... Question is, is the handling response same if using the 265/65R18 and 275/55R20 comparing it to the ppv size tires 265/60R17?

265/65R18 = 31.56" ... 265/60R17 = 29.51"
Speedometer will be 7% faster than actual until you reprogram for the difference.
At least your oil changes will happen on time ...

Less wheel (mass) = better ride. More wheel = better handling.
More sidewall = better ride. Less sidewall = better handling.
Tough to achieve both at the same time without excellent shocks.

275/55R20 is going to handle better (but ride less comfortably) than the other two tire sizes,
because it has the least sidewall, and also it has wider treadwidth ... and it also has more tires to choose from.

https://www.1010tires.com/Tools/Tire-Size-Calculator3

It can compare up to 5 different tire sizes against each other.

 

[j91z28d1]

been my experience that turn in feel is more about the tire type than being a half in shorter. a very expensive high end sport suv market tire will be more crisp than a lower end truck tire. LT truck tires usually have a stiffer side wall for towing that should feel stiffer in the front too.

trade off being ride

 

[88mike]

265/65R18 = 31.56" ... 265/60R17 = 29.51"
Speedometer will be 7% faster than actual until you reprogram for the difference.
At least your oil changes will happen on time ...

Less wheel (mass) = better ride. More wheel = better handling.
More sidewall = better ride. Less sidewall = better handling.
Tough to achieve both at the same time without excellent shocks.

275/55R20 is going to handle better (but ride less comfortably) than the other two tire sizes,
because it has the least sidewall, and also it has wider treadwidth ... and it also has more tires to choose from.

https://www.1010tires.com/Tools/Tire-Size-Calculator3

It can compare up to 5 different tire sizes against each other.

Thank you so much , yeah is true, can’t have both same time. So what about if I have two set of wheel with tires? Because I was thinking to swap the wheels with tires already . Them when i need more of one of these two features, handling or comfort I can choose. But for me the best is the safest one on highway. And even though comfort is good, I hate that feeling of boat ride when I need quickly move to the side to not hit something on the road.

 

[88mike]

Ok so I finnally got it, and weird thing,it came with 265/60/18 tires on the rim. Two different brands also. Looking at the door it can confirm it’s supposed to be 265/65/18 , so my question now is why the hell someone installed lower tires? And if is ok it? Using that online tool to compare tires, i checked on the pressure , and supposedly these tires 265/60/18 is not safe for the weight of the suv, I wonder if old owner didn’t know the correct tire or just wanted to do that. Maybe was a good deal price. Don’t know.
What you guys think about it?
Its little worn down so I should just replace it. I thought about nexen as i read here some comments on the quality and price of these. What about nokian tires?
I saw an auction listing and it had nokian tires. I had on a trailblazer and they are good.
I have some steel 17 rims with worn tires as well. Maybe i will get tires 265/70/17.
Now has anyone drive 4wd nexen tires on snow already? How was it conpared to others brands?

 

[Joseph Garcia]

Changing the profile of the tire won't hurt anything, as long as the overall tire diameter is not too tall for the wheel well. In your case, the speedometer/odometer will be off a bit, due to the diameter difference, and the lower profile tire will handle somewhat better. Unless that 60 profile tire is some special type of tire (unknown to me), the weight of your truck is not too heavy for that tire. Now, if you plan to tow a heavy trailer, then you would want LT tires, as they are stronger and will carry more weight.

If the vast majority of your driving is on pavement, IMO, Michelin Defender tires are about the best you can buy. They have handled anything that a NH winter can throw at them. If you are looking for a more 'aggressive' tire look, then there are other options, and other folks will chime in with their opinions.

 

[Geotrash]

Changing the profile of the tire won't hurt anything, as long as the overall tire diameter is not too tall for the wheel well.

Agreed... with the notable exception that changing the tire size sometimes comes with a drastic difference in load carrying capacity because they're designed for a different weight class of vehicle. The 235/60/18 tires on our LR2 would not safely support the weight of a Yukon XL, for example. Sounds like that's what he has going on, too.

I have no personal experience with Nexen tires but I see them frequently on the road and reviews of them seem overall positive. Be careful with used/FB marketplace tires being sure to check the date codes on the sidewalls. I've seen old tires passed off as 'like new' on FB.