IROK vs MT/R - : Jeep Wrangler JK Forum
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post #1 of 2 Old 09-15-2014, 01:24 PM Thread Starter
FlatlanderWB's Avatar
Join Date: Aug 2014
Location: Grand Island, Nebraska
Age: 73
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I'm trying to choose between the two. I'm primarily interested in a tire that will stick to the rocks for serious rock crawling. Its not a daily driver. But I don't have a trailer and the trails I do are 8 to 12 hours of interstate driving away. So the tires have to be safe and stable for 75 MPH Interstate driving.

Size 37X12.5 R17. Plan to mount them on Interco Birddog 17X9 wheels. Birddog wheels because the manufacturer claims that they can be aired down to 4 to 10 psi and still hold a bead. Four Wheeler magazine testing seemed to confirm this. I like to rock crawl at less than 10 psi. With a 37 even 5 psi sounds really good if it really does hold a bead well. I don't want to deal with true beadlocks.

Sidewall puncture resistance is important. I wheeled with BFGs in the 90s and lost 3 over those years to sidewall punctures. One on Wolf's Run near Las Cruces, NM, one on Behind the Rocks in Moab and one on Blanca Peak in CO. If there isn't a tire shop near the trail that can replace the tire then my outing is over because I can't risk another ruined tire which would leave me stranded on the trail.

I like the soft rubber the IROKs come with because I feel the soft rubber will have more traction on the rocks. I am willing to put up with the higher cost and shorter tread life if they really do significantly outperform on the rocks and are safe and stable enough for long Interstate drives. Do they significantly outperform the MT/R on the rocks? Are they safe and stable on the Interstate? How resistant are they to sidewall punctures? Do they air down well or are the sidewalls too stiff?

The MT/R with Kelvar are supposed to have good sidewall puncture resistance, are less expensive, should be safe and stable on the Interrstate and are much easier to find when a replacement is needed. Are they really more resistant to sidewall punctures? How do they stick to the rocks compared to the IROK? Do they air down well or are the sidewalls too stiff?

Any other tire/wheel I should be considering? Any comments/suggestions appreciated.
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post #2 of 2 Old 09-15-2014, 01:28 PM
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Join Date: Jan 2010
Location: Guntersville
Age: 29
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ive been pretty impressed with my MT/Rs with kevlar. Im in the southeast so most of our rocks are covered in mud or moss. look into getting a tire groover and you can really make the MTRs bite onto the rocks.

2008 steel blue sahara
with some doo-dads
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