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Tire size change?

33K views 27 replies 17 participants last post by  Snowhawk2015 
#1 ·
I have 2014 latitude AD2 running stock 225/65/17 firestone destination LE tires. Want to get the 235/65/17 destination AT tires. Anyone know if I do this will i have enough turning radius clearance so that tires wont rub wheel well when turning? Especially when making very sharp turns. Thanks.
 
#2 ·
Several have swapped on the Trailhawk 245/65 17's onto the ADII Latitude with no problems so a smaller tyre should not be an issue unless the wheel offset is different.
 
#5 ·
I'm running 275/60-17 and have zero rubbing. My tires offer an extra 1" in tread width and 1/2" increase in diameter. They look and fit great!
 

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#6 ·
Another pic...
 

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#8 ·
I believe the tires you buy are limited more by the rim size and that it seats properly, providing stability to the sidewall. Mucking with tire size may allow for clearance, but the tires characteristic may be changed.
 
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#11 ·
I've got a Latitude AD1 and am running the TH 245/65/17's and there's no rubbing at all.

Also @dylan5598 - you bit the bullet and got the new tires? Nice one. I nominate you to be the guinea pig for the German Eibach Springs....:)
 
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#17 ·
I checked the specifications for the 225-60-17s and the 245-65-17s at Tire Rack

225-60s - 27.6 inches diameter - revs per mile 753

245-65 - 29.5 inches diameter Revs per mile 704

So the 245s are 2 inches taller. That makes the final drive ratio significantly taller if these tires are added, which will negatively impact acceleration and pulling/towing power. Not to mention, will throw off the speedo and odometer by about 7%

To calculate effective axle ratio change by increasing to the taller tires - 704/753 x 3.25(axle ratio on Cherokees equipped with 225-60-17 tires) = 3.04 to 1 effective axle ratio.

This is why the Active Drive 2 and Trailhawks which come equipped from the factory with 245-65-17 tires have a lower rear axle ratio of 3.51 to 1; it's not because of, IMHO, the "towing package". If you reverse the math, a Cherokee with a final drive ratio of 3.25 to 1 would need to have a 3.48 to 1 axle ratio to stay the same with the 245-65 tires. The Trailhawk =3.51 final drive ratio - this gives it the SAME effective drive ratio to the pavement as Cherokee with a 3.25 axle ratio (.03 difference which is negligible).
 
#20 ·
Speedo can not be recalculated. The larger tyres generally reqyire a shorter (higher number) diff ratio.

Basically the best you can do is fire up a gps and compare then remember what the differ is.

I went from the stock TH 245/65 to 245/70 which are 3.5% larger. My speedo now read 1km slow at 100km actual.

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#21 ·
Basically the best you can do is fire up a gps and compare then remember what the differ is.
If you have built in NAV you can look at the trip computer and it will give you your current GPS based speed.
 
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#22 ·
Really? Never seen that before! Will have a play on the way to work.

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#23 ·
Hmm.. just looked at mine on the trip to work and it only covers averages of the last programmed trip, couldn't see amy instant speed. Maybe it needs to be navigating at the time? Have a long trip tomorrow with nav guiding me so will look again.

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#25 ·
Glad your tire sizes seem to work well for several folks on this thread. I intended to do the same thing and ordered 235/65/17 BF Goodrich as they had a bit more of an aggressive tread than the stock ones. I had the dealership order and when I went in to get them put on, they wouldn't do it. They said it would damage the car and the tire because they would rub. Tirerack, this thread, other threads and a few other spots on the internet indicated that this size would be fine. Not sure if it was a warranty issue or something. Do you find that there is any rubbing at all now having them on for a while? I have a 2014 Jeep Cherokee Latitude AD2.
 
#28 ·
Why did you post this in two places?

I have a 2014 TH all stock right now. I am looking at adding in the dobinson's 1.25" lift for the TH version. Will this be enough clearance to get some 32" BFG KO2's without scraping?
If you go narrow, 235/80r17 worked for me. 245/75r17 rubs on engine side of wheel liners at hard over left and right.
 
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