Opinions on Cooper STT Pro?

wibornz

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Just got a set of STT Pros in 37x12.50x17 installed yesterday, coming from 315/70/17 BFG KO2's that were 'C' rated. I can say I am pleasantly surprised at the comfort and volume as well as the traction in rain. My KO2's fishtailed at every corner in the rain and I couldn't get the Coopers to slide yesterday. I was set on getting Ridge Grapplers or Toyo RT's because I didn't want the noise of a mud terrain but they are on a national backorder. It has been 20 yrs since I have had a mud terrain but the hum of the STT's is quiet in my opinion. Now just need to dial in the chalk test as the 40psi Discount set them at is sending the car all over the road.
I run mine at 26 to 27 psi. Will bump the back up to 30 psi hauling my camper and loaded down for Jeep traveling.

 

cdavison82

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I run mine at 26 to 27 psi. Will bump the back up to 30 psi hauling my camper and loaded down for Jeep traveling.
original wheels? 7.5”
 

Jshwon

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Will the 37x12.5 STT Pro mount to the stock Rubicon wheel fine? I am undecided on wheels but want to get on some 37s until I decide.
 

RockyMtJL

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i wish I could say the same. People tell me they can understand me due to the road noise on the highway with my 37” stt pros. Only 5k miles on them. I love their performance offroad which is the reason I bought them. Yes, a little annoying how much road noise I get but it’s not a deal breaker. I also find myself needing to get them rebalanced frequently.

I can easily talk on the phone through Uconnet at 80 mph.
 


wibornz

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i wish I could say the same. People tell me they can understand me due to the road noise on the highway with my 37” stt pros. Only 5k miles on them. I love their performance offroad which is the reason I bought them. Yes, a little annoying how much road noise I get but it’s not a deal breaker. I also find myself needing to get them rebalanced frequently.
Do you have the hard top or the soft top?
 

cdavison82

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Will the 37x12.5 STT Pro mount to the stock Rubicon wheel fine? I am undecided on wheels but want to get on some 37s until I decide.
Yes mine are on stock rubicon wheels. 7.5” wide
 


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texasbryan

texasbryan

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I had the STT Pro's on my 14 JK Willys and they were great tires.

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Are those 35s? If so, is the E rating noticeably stiff?
 

Digger70

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Jeepin_Donnie

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Cooper STT Pros are the only tire I will run on my rigs! They perform great in all conditions and especially offroad!
 

conFUcius

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I love mine. @UNC Rubicon AND @chevymitchell recommended them and have zero regrets since switching from my KO2s. Noise is minimal compared to the KO2s. No complaints with their performance on the highway and off-road.
 
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texasbryan

texasbryan

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I love mine. @UNC Rubicon AND @chevymitchell recommended them and have zero regrets since switching from my KO2s. Noise is minimal compared to the KO2s. No complaints with their performance on the highway and off-road.
Good to hear! Are you running 37s or 35s? My only concern now is that the 35s have an E sidewall.

 

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