An 8.5 wheel has a centerline (0mm offset) at 4.75" backspace. Add 25mm offset, which is ~1" and that changes the backspace to 5.75".
Just a quick note.... if that is indeed the root cause and the wheels are 5.75" backspace as opposed to the 5.3" backspace they [seemingly incorrectly] claim, you probably have grounds to have them swap out the wheels for the JK series which *should* work better.
Superlift clearly states in their application notes:
New wheel with maximum backspacing of 5.5" is required for installation. Factory spare can be used as a temporary spare in emergency situations.
They are definitely 17x8.5 inch wheels. I talked to AEV a while back because I noticed what they had posted online was incorrect. Whatever they posted for the offset didnt mathmatically add up to what they posted for the back spacing. If I recall corectly they said the offset was correct and they posted the wrong back spacing. I havent been on their website to see what its listed as lately. Ill check now.
EDIT: The website says +25 offset and 5.3 inches of back spacing. Obvioulsy they havent corrected it. Maybe next time trailbyfire has a wheel off he can just measure it. Or did he do that already and i missed it.
Last edited by 07JeepXK; 06-05-2012 at 04:02 PM.
2007 4.7 Liter XK | Front Modified OME HD Lift | Rear 4" Superlift | JBA UCA's | Rusty's Rear Adjustable Track Bar | Rysty’s Adjustable Upper and Lower Rear Control Arms w/Heim Joints | Mickey Thompson Classic III 17x9 Wheels | 315/70R17 Goodyear Duratracs | Airflow Snorkel | Flowmaster 40 Series Muffler | Superchips Flashpaq | Mopar Skids | 4xGuard Belly Guard | American Rebel Rear Diff Cover | Rear Powertrax No-Slip | Front Electronic Locker | Rear Heat/AC Delete
They still claim 8.5" wide, +25mm offset and 5.3" backspace: http://www.aev-conversions.com/shop/...-beadlock.html
I remember this came up a while ago because someone on JF was arguing with me, they claimed I didn't know what offset and backspace were because "according to AEV...." lol you fill in the rest
That's funny cause AEV admitted their website was incorrect.
2007 4.7 Liter XK | Front Modified OME HD Lift | Rear 4" Superlift | JBA UCA's | Rusty's Rear Adjustable Track Bar | Rysty’s Adjustable Upper and Lower Rear Control Arms w/Heim Joints | Mickey Thompson Classic III 17x9 Wheels | 315/70R17 Goodyear Duratracs | Airflow Snorkel | Flowmaster 40 Series Muffler | Superchips Flashpaq | Mopar Skids | 4xGuard Belly Guard | American Rebel Rear Diff Cover | Rear Powertrax No-Slip | Front Electronic Locker | Rear Heat/AC Delete
'06 XK Limited, 5.7 Hemi, QDII, OME struts & HD springs, JBA UCAs, 285/70R17 BFG KM2, 4XGuard Sliders, 4XGuard Diff Guard, Fox 2.0 reservoir shocks, custom bumpers and Warn xi9000
Wish list: SFA, in-dash Windows 8 PC
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