Benefit from wider & taller tire?

Elgreco · Aug 23, 2014

I highly doubt anyone would care enough to even think of voiding the warranty for that. I've never heard of Chrysler asking if a vehicle has larger than OE tires for any warranty concern in the 3+ years I've been wrenching at a dodge dealer.

elpayaso · Aug 23, 2014

Do the math

Hello paokarathodoros,
Thessaloniki Greece looks like a beautiful city. The closest I ever came to Greece was the Kithira Anchorage offshore. Anyway you got it right when you said “On the down side with wider tires you loose acceleration, AND most importantly it is as if we have LESS TORQUE???? (an area where patriot suffers): (so in sum larger tires alone are negative especially offroading?)”
I will suggest you look at the Outer Diameter closely and keep it as close to the original dimensions as possible. You may decrease the rim to 16” for a softer ride or go wider tire like 225 or 235, but the main consideration is your primary driving environment. I made several calculations and decided that the 225 65R16 Touring Tire is the most suitable choice for my Patriot and my driving environment here in South Florida.
* Torque is what makes the wheel go around and changes to the wheel’s overall diameter will directly affect torque and may also affect the transmission which may affect acceleration and other changes may affect breaking and handling. * Rule of thumb: for every 1” increase in wheel diameter there is a 3.5% loss in torque. * Wheel outside Diameter = Rim Diameter plus twice Section Height. Tire Footprint: The tire section in contact with the road. Wider is good in dry surface, very bad on wet surface due to Hydroplaning and increased drag. * Wider tires will not necessarily yield better traction due to tire tread, road surface, and driving environment. I recommend research and take a look at the numbers. Meanwhile without additional modifications the numbers do not support dramatic changes in rim or tire. My recommendation is to research and do the math.
Hope it helps. Chief

Terasec · Aug 23, 2014

Elgreco said:
Tires would have no effect on warranty. I install 4" lift kits on brand new rams with 35's all the time. These are unsold trucks on the lot.

Thats in us
Eu they tend to be strict on keeping cars within oe specs
Whether its warranty or inspection

Elgreco · Aug 23, 2014

I can't comment on how it works in the EU because I do not know.

paokarathodoros · Aug 23, 2014

Hi elpayaso, yep thessaloniki is quite nice city... Kithira where u have been is further south... thessaloniki is a port on the north of Greece.

(paok is my football team here in thessaloniki ...... not performing well lately...:doh: and thodoros=theodore my name)

Thanks also for the maths. very helpful

My main driving environment is tarmac, (so the most sensible option would be keep the OEM dimension and go for a 100% flat-asphalt tire) But then, I guess often more for psychological reasons I say i own a jeep (even a light weight one) so u want to have the ability for some offroad....

I have almost concluded to the 225-65/17 Continental cross LX 2 (which are 80 on road-20% offroad) not sure if they sell this brand in US.

The main benefit is that I like the fact that the patriot will be about 1 inch taller 28,5 from 27,5 (with OEM 215-60-17)

The thing that gives me second thoughts is the loss of torque issue. 220 Nm is very low number for a vehicle 1600 kg. So going to approx 213 Nm with ur calculations is even smaller.

That was my main concern when raising this thread. If anyone with taller tires has experienced this reduction in torque. Climbing up hill etc... (Because on highway I think the patriot is ok Horsepower wise especially as the revs go up.

But I am wondering if at low revs when offroad , if anyone has experienced this reduction in torque??

Regarding the speedometer being a lawyer (although Greek- continental law and I have not read the US warranty terms), I dont believe someone is in breach for that. The dealer may only question the number of kilometers u have travelled. So he can only claim that ur warranty has expired a little earlier (if he can calculate and prove the correct number of km). Changing the tires in no way can be interpreted as a modification that harms the engine etc...so as to void the warranty) ....

goguadi · Aug 23, 2014

paokarathodoros said:
Hi elpayaso, yep thessaloniki is quite nice city... Kithira where u have been is further south... thessaloniki is a port on the north of Greece.

(paok is my football team here in thessaloniki ...... not performing well lately...:doh: and thodoros=theodore my name)

Thanks also for the maths. very helpful

My main driving environment is tarmac, (so the most sensible option would be keep the OEM dimension and go for a 100% flat-asphalt tire) But then, I guess often more for psychological reasons I say i own a jeep (even a light weight one) so u want to have the ability for some offroad....

I have almost concluded to the 225-65/17 Continental cross LX 2 (which are 80 on road-20% offroad) not sure if they sell this brand in US.

The main benefit is that I like the fact that the patriot will be about 1 inch taller 28,5 from 27,5 (with OEM 215-60-17)

The thing that gives me second thoughts is the loss of torque issue. 220 Nm is very low number for a vehicle 1600 kg. So going to approx 213 Nm with ur calculations is even smaller.

That was my main concern when raising this thread. If anyone with taller tires has experienced this reduction in torque. Climbing up hill etc... (Because on highway I think the patriot is ok Horsepower wise especially as the revs go up.

But I am wondering if at low revs when offroad , if anyone has experienced this reduction in torque??

Regarding the speedometer being a lawyer (although Greek- continental law and I have not read the US warranty terms), I dont believe someone is in breach for that. The dealer may only question the number of kilometers u have travelled. So he can only claim that ur warranty has expired a little earlier (if he can calculate and prove the correct number of km). Changing the tires in no way can be interpreted as a modification that harms the engine etc...so as to void the warranty) ....

hi!
sorry for asking here,but do you know where exactly is the jeep patriot hellas club meeting tomorrow?
i know it is somewhere near volos,but where?
thanks

rcguymike · Aug 23, 2014

paokarathodoros said:
If anyone with taller tires has experienced this reduction in torque. Climbing up hill etc... (Because on highway I think the patriot is ok Horsepower wise especially as the revs go up.

But I am wondering if at low revs when offroad , if anyone has experienced this reduction in torque??

I've experienced it plenty of times on stock tires. We need a low range badly. It's not so bad if you can back up and get a run but sometimes that is unsafe.

paokarathodoros · Aug 24, 2014

Iam not sure if there will be a meeting after all, since I didnt see many people intrested, I think it too early, cause still summer weekends everyone is at the beach and not on mud trails...

Theoretically it was planned to meet 10.30 am at volos end of Dimitriados st.
(i dont know where it is but they say u can find it on google)

http://jeeppatriot.forumgreek.com/t106-topic

Maybe can ask them on the facebook group

https://www.facebook.com/groups/113925947629/

aroundincircles · Aug 24, 2014

paokarathodoros said:
But I am wondering if at low revs when offroad , if anyone has experienced this reduction in torque??

I have done A LOT off off roading in a patriot, and we're talking such small changes in over all diameter that you'll have no issues with that size, I ran a 30" tire and it did not have as big of impact as tire weight. I got very heavy tires, and it made a huge difference, I switched to a tire that was the same over all size, but lighter in each corner by over 8lbs (still much heavier than stock tires). It made a HUGE difference in power. so keep that in mind. see how heavy the tire is compared to the stock tires. if its within 10lbs a corner, it should be a safe bet.

goguadi · Aug 24, 2014

paokarathodoros said:
Iam not sure if there will be a meeting after all, since I didnt see many people intrested, I think it too early, cause still summer weekends everyone is at the beach and not on mud trails...

Theoretically it was planned to meet 10.30 am at volos end of Dimitriados st.
(i dont know where it is but they say u can find it on google)

http://jeeppatriot.forumgreek.com/t106-topic

Maybe can ask them on the facebook group

https://www.facebook.com/groups/113925947629/

ευχαριστό πολή¡

paokarathodoros · Aug 24, 2014

the 225-65-15 continental LX2 are 27.1 lbs (each tire)

while the OEM 215-60-17 continental premium contact 2. weight 22.9 lbs

So based on ur rule it seems ok..

elpayaso · Aug 24, 2014

As we say in the US of A

goguadi said:
ευχαριστό πολή¡

Now that's all Greek to me!

epper:

aroundincircles · Aug 24, 2014

paokarathodoros said:
the 225-65-15 continental LX2 are 27.1 lbs (each tire)

while the OEM 215-60-17 continental premium contact 2. weight 22.9 lbs

So based on ur rule it seems ok..

Mine were close to 40lbs. so you should be just fine!

480KREEPIN · Aug 24, 2014

when I went to a larger tire I immediately noticed it corned much better! it definitely felt grippier. I know that isn't a word, by it should be

rcguymike · Aug 24, 2014

aroundincircles said:
I have done A LOT off off roading in a patriot, and we're talking such small changes in over all diameter that you'll have no issues with that size, I ran a 30" tire and it did not have as big of impact as tire weight. I got very heavy tires, and it made a huge difference, I switched to a tire that was the same over all size, but lighter in each corner by over 8lbs (still much heavier than stock tires). It made a HUGE difference in power. so keep that in mind. see how heavy the tire is compared to the stock tires. if its within 10lbs a corner, it should be a safe bet.

You also had a FDII.

aroundincircles · Aug 24, 2014

True, but the tire size is only .5" over stock, and the weight is only a few more lbs. I was only 2" over stock but almost double the tire weight of stock. I had to throw on some super cheap tires to sell it, and they weighed just under 30lbs, vs the nearly 40lbs my AT tires weighed but were the same size as the AT tires, and the difference in performance was noticeable, just by changing the weight of the tire.

paokarathodoros · Aug 25, 2014

another question

Watching fotos of fellow patriot owners who went to taller tire diameter without a lift

There seems (in the fotos at least) to be left a little space between the top end of the tire and the car body (not sure how is called in english).

So is there an issue when suspension is compressed (eg when passing an obstacle) ie there is less space for the springs to contract as the top of the tire touches the body of the car?

Benefit from wider & taller tire?

Elgreco

elpayaso

Terasec

Elgreco

paokarathodoros

goguadi

rcguymike

paokarathodoros

aroundincircles

goguadi

paokarathodoros

elpayaso

aroundincircles

480KREEPIN

rcguymike

aroundincircles

paokarathodoros

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