Tired of searching for tire info... - Jeep Commander Forums: Jeep Commander Forum
Wheels / Tires This section contains discussion about wheels and tires for your Jeep Commander.

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post #1 of 11 (permalink) Old 11-11-2008, 10:23 PM Thread Starter
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Tired of searching for tire info...

I have narrowed it down to two sizes - either stick with stock size or gain about an inch going to a 245/70-17.

I just can't seem to pull the trigger. Is there a substantial mileage loss in going up an inch? Will I get that much better performance out of the taller tire and is it worth the mileage loss? I do very little off-roading (not by choice, just nowhere to go around here) but we do get lots of snow. I know the taller tire will help out in the snow.

I have the Rocky Road lift and Spidertrax spacers, so clearance is not an issue with the sizes I'm considering.

Brendon

07 Limited, Hemi, factory skid plates (dented and scratched
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), 4XGuard rock rails, OME HD springs and shocks, Spidertrax, Goodyear Dura Trac 245/70-17
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post #2 of 11 (permalink) Old 11-11-2008, 10:31 PM
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I just spent the day 4x4ing with my new 255/75R17 and got 8 mpg.





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2006 XK, Steel Armadillo Front Bumper w/Warn Powermate winch, Rear Bumper w/tire carrier & Super Sliders, Rhino Rack Roof Rack and Foxwing Awning, KC Lights on Steel Armadillo Light Bar, 4xGuard Rear Differential Cover, Steel Armadillo Plates.
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post #3 of 11 (permalink) Old 11-11-2008, 11:03 PM
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Go with the taller tire, you won't be disappointed. In fact you may get better MPG on the highway. I could not tell the difference with mine, but I did do a few other mods at the same time.

07 Mineral Gray Limited:, 4.7, Daystar Lift, 245/70/17 Wrangler Dura-Tracs, u-connect, some chrome do dads, 20% tint, skids, LED Tails, HIR bulbs, splash guards, aFe intake, magnaflow muffler, RR Supersliders, 4X front and belly guard. "Get Lost" Diff Cover, and UCA's sitting on floor.
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Last edited by my800; 11-18-2008 at 10:00 PM.
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post #4 of 11 (permalink) Old 11-13-2008, 08:50 PM Thread Starter
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Well, I got the 245/70-17 Nokian Vatiiva A/T. About 1" taller than stock. Only one day on them so it's hard to say how they are in all situations other than they feel a lot better than the OEM junk that was on there.

Brendon

07 Limited, Hemi, factory skid plates (dented and scratched
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), 4XGuard rock rails, OME HD springs and shocks, Spidertrax, Goodyear Dura Trac 245/70-17
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post #5 of 11 (permalink) Old 11-13-2008, 09:10 PM
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i love my 255/75/17's. i lost 1 mpg. but who cares at 1.95 a gallon. i drive a lifted box with full time 4 wheel drive.
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post #6 of 11 (permalink) Old 11-14-2008, 08:49 AM
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Each time the tire rotates with a a larger tire the Jeep will cover a greater distance, so the computer MPG readout and speedo will be off. You"ll have to add 5-10 % to the road speed and mileage to figure out a true number - it all depends on how tall you go.

Brian

07 Commander : 4x4 - Hemi - OME springs - JK Sahara rims & rubber - Spidertrax 1.25 spacers - Jet Stage 1 - K&N

97 TJ : 3.8 Atlas II - ARB'ed HP 44 front - spooled full float 44 rear - 4.56 gears - beadlocked 35's - Warn 8274-50
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post #7 of 11 (permalink) Old 11-14-2008, 08:54 AM
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With the new 32's on my XK my speedometer is slow by 5 MPH



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post #8 of 11 (permalink) Old 11-17-2008, 10:07 AM
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Brendon - I am certain you won't be disappointed with the Nokian tires - these things have been great on my Jeep so far. I lost very little in actual mpg since adding them, and I have been playing around with tire pressure (currently at 35psi and thinking of going up to around 39psi) - Let me know what you think!

2006 Jeep XK Limited * Saddle Brown Interior * 5.7 Hemi * Mopar CAI 245/70 R17 Nokian Vitiiva A/T 30.5" * EBC Green Stuff SUV Brake Pads
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post #9 of 11 (permalink) Old 11-18-2008, 09:14 PM Thread Starter
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I'm glad you like them. For me it was never really a question of what tires, but what size.

I love Nokian tyres (I liked them so much I became a "hobby dealer" for Nokian a few years ago) and have them on all my cars that see winters.

I am running these at 37psi and seems good so far. My Jeep actually corners better on the pavement with these tyres, the lift, and spacers than it did stock. I can't wait for the snow to fly.

Brendon

07 Limited, Hemi, factory skid plates (dented and scratched
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), 4XGuard rock rails, OME HD springs and shocks, Spidertrax, Goodyear Dura Trac 245/70-17

Last edited by brendon; 11-18-2008 at 09:18 PM.
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post #10 of 11 (permalink) Old 12-16-2008, 09:56 PM
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Do the 255 75 17's rub on the rim?
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