It looks like the 17X7.5 Moab wheels are at about 6.25" Backspacing (44.45mm Offset). So with a 1" spacer it is equal to a wheel with 5.25" backspacing and a 1.25" spacer at 5" backspacing?
It looks like the 17X7.5 Moab wheels are at about 6.25" Backspacing (44.45mm Offset). So with a 1" spacer it is equal to a wheel with 5.25" backspacing and a 1.25" spacer at 5" backspacing?
[05 WK Khaki 4x4 5.7L QDII ][ 5" SL (OME HD coils and struts) ][ 295/70/17 Nitto Trail Grapplers on 17" Moabs (for the daily grind) ][ 35x12.50R17LT BFG MT KR (for wheeling) ][ Hidden Superwinch in stock bumper][ And soooooo much more... ]
I found a post on a jeep forum where a member said his wheels are stamped 17x7.5 44.45mm offset on the inside. Thats equal to 6 inches of back spacing. Plug the wheel specs into this calculator.
http://www.rimsntires.com/specs.jsp
Last edited by 07JeepXK; 03-12-2012 at 11:47 AM.
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
Yup yup.... 7.5+1= 8.5" which means the centerline is at 4.25" backspace. 44.45mm offset is 1.75 inches. Add the offset to the centerline position and you get 4.25+1.75= 6" backspace.
So there 7.5" wide with 6" backspace.
1" spacer = 5" effective backspace
1.25" spacer = 4.75" effective backspace
Sometimes I hate math and its just easier to use a tire/wheel calculator...lol
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
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