Newbie Help RK3.5"lift with srt-8 20x9??? - Jeep Commander Forums: Jeep Commander Forum
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post #1 of 5 (permalink) Old 03-21-2011, 03:33 PM Thread Starter
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Question Newbie Help RK3.5"lift with srt-8 20x9???

I have a 2007 commander and was going to buy a 3.5" rock krawler kit and wanted to run the 20x9 srt-8 replica wheels with a 6.25 back spacing. what is the max height and max width tire I can run with or without spacers?

thanks

Nick
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post #2 of 5 (permalink) Old 03-21-2011, 06:48 PM
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From what others have posted, with the Rock Krawler kit, youll only gain about 2 inches of lift or so. Not sure why they advertise 3.5 inches. With those 20x9 wheels you in theory should be able to run a tire size thats equivalent to around a 275/55R20 (31.9 inches tall by 10.8 inches wide) or 275/50R20 (30.9 inches tall by 10.8 inches wide). However, the problem you would run into is hitting the upper ball joint bolt since the wheels dont stick out that far at all due to the back spacing. The only thing I can really recommend is keeping the tire height a little lower and/or trimming the ball joint bolt for clearance with the taller tire. Any tire that is around 30 inches tall will clear no problem but then it wont fill out the wheel well. Looks like you might have to do some test fitting if possible.




2007 4.7 Liter XK | Front OME MD Springs w/Superlift Preload Spacer | Rear 4" Superlift Springs | Bilstein 5125 Rear Shocks | JBA UCA's | Rusty's Rear Adjustable Track Bar | Black Rock 997 Wheels | Fred Goeske 1/4 Inch Wheel Spacers | 305/70R17 Goodyear Wrangler MT/R w/Kevlar | Airflow Snorkel | Flowmaster 40 Series Muffler | Superchips Flashpaq | Mopar Skids | 4xGuard Belly Guard | American Rebel Rear Diff Cover | Rear Powertrax No-Slip | Front E-Locker | Rear Heat/AC Delete
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post #3 of 5 (permalink) Old 03-22-2011, 06:09 AM Thread Starter
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well that gives me a good starting point do you think I should run the spidertrax spacers?
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post #4 of 5 (permalink) Old 03-22-2011, 07:44 AM
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Quote:
Originally Posted by onebadf150 View Post
well that gives me a good starting point do you think I should run the spidertrax spacers?
Well I just worked the numbers again and those 20x9's with a 275 mm wide tire will sit 1.1 inches out farther then your stock wheels and tires. Which in my opinion will look amazing because it will be about flush with the fender flares. So, you definately dont want to add wheel spacers. Again, my only concern is going with a tire thats to tall because you will hit the ball joint bolt. When I say to tall, i mean the normal height tire that guys are running with a 2 inch lift (approx 32 inches). You might have to go with a tire thats around 30 inches tall.




2007 4.7 Liter XK | Front OME MD Springs w/Superlift Preload Spacer | Rear 4" Superlift Springs | Bilstein 5125 Rear Shocks | JBA UCA's | Rusty's Rear Adjustable Track Bar | Black Rock 997 Wheels | Fred Goeske 1/4 Inch Wheel Spacers | 305/70R17 Goodyear Wrangler MT/R w/Kevlar | Airflow Snorkel | Flowmaster 40 Series Muffler | Superchips Flashpaq | Mopar Skids | 4xGuard Belly Guard | American Rebel Rear Diff Cover | Rear Powertrax No-Slip | Front E-Locker | Rear Heat/AC Delete
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post #5 of 5 (permalink) Old 03-24-2011, 04:05 PM Thread Starter
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Originally Posted by 07JeepXK View Post
Well I just worked the numbers again and those 20x9's with a 275 mm wide tire will sit 1.1 inches out farther then your stock wheels and tires. Which in my opinion will look amazing because it will be about flush with the fender flares. So, you definately dont want to add wheel spacers. Again, my only concern is going with a tire thats to tall because you will hit the ball joint bolt. When I say to tall, i mean the normal height tire that guys are running with a 2 inch lift (approx 32 inches). You might have to go with a tire thats around 30 inches tall.
thanks I really appreciate you taking the time to help me with this I'm going to start looking for tires in that size range I will keep you posted!

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