Project Mercenary
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Joined: Mar 2016
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Year: 1999
Model: Cherokee
Engine: 4.0
I ended up going with another set of 35s. Hope I made the right choice. From what I've seen and from talking to others, the stt pros run pretty true to size. Thought long and hard about 37s, but ultimately 35s suit this one better. Next build will be bigger
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Joined: Mar 2016
Posts: 672
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Year: 1999
Model: Cherokee
Engine: 4.0
Agreed. My line of thinking as well. Plus this rig was never meant to be a dedicated crawler. I'm already geared to 4.56 with will be better on the highway on 35s. Plus I'd rather be over built than pushing the limit. I'll go big on xj #2
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Joined: Mar 2016
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Year: 1999
Model: Cherokee
Engine: 4.0
Last edited by Jeepology; Nov 1, 2016 at 11:25 AM.
Thread Starter
Senior Member
Joined: Mar 2016
Posts: 672
Likes: 7
Year: 1999
Model: Cherokee
Engine: 4.0
CF Veteran

Joined: Feb 2015
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From: North Carolina
Year: 1993
Model: Cherokee
Engine: 4.0
Thread Starter
Senior Member
Joined: Mar 2016
Posts: 672
Likes: 7
Year: 1999
Model: Cherokee
Engine: 4.0
CF Veteran

Joined: Jan 2015
Posts: 1,364
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From: Dont Colorado Wyoming
Year: 1990
Model: Cherokee (XJ)
Engine: 4.0
So turns out I heard wrong lol. Received my 315 STT Pros and they were MUCH smaller than my previous 35" MTRs. Slightly bigger than a 33, but not by much. I was able to get rid of this set almost instantly for $50 profit and ordered them again in 37x12.5 just in time and on the last day of the sale. Hoping that the same holds true for these and they run a little small


Thread Starter
Senior Member
Joined: Mar 2016
Posts: 672
Likes: 7
Year: 1999
Model: Cherokee
Engine: 4.0
These were 315/70-17 so keep that in mind. Sometimes other sizes will run closer than others. According to Cooper's website they are the exact same measurement as the 35x12.5s though










