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post #1 of 8 Old 06-08-2011, 07:04 PM Thread Starter
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18 or 20" rims

What offset and backspacing do I need to run a 315 tire without rubbing on the leafsprings, anyone know a good brand in black, thanks!

03 F350 SRW CC LB 4x4
4" Lift, 33 Tires, Pro Comp Trac Bars.
CFM+ Largemouth KIT
MBRP 4" straight pipe
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post #2 of 8 Old 06-08-2011, 07:31 PM
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4.5" backspacing

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post #3 of 8 Old 06-09-2011, 05:34 PM Thread Starter
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what about offset?

03 F350 SRW CC LB 4x4
4" Lift, 33 Tires, Pro Comp Trac Bars.
CFM+ Largemouth KIT
MBRP 4" straight pipe
SCT By DJ
ISSpro Gages
Rack it Racks
===============
Debating Fass or RR
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post #4 of 8 Old 06-09-2011, 08:44 PM
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As far as I have been able to figure out, once you determine the backspacing, the offset is irrelevant when it comes to inside clearance. The backspace is the distance from the backside of the hub to the back lip of the wheel. The offset and backspace are directly related except offset is used to determine the distance off center the front of the flange is with respect to the center line of the wheel. The more positive the offset, the more inset the wheel will sit in the fender well and vise versa...Therefore the larger the backspace the more positive the offset will be.
I could be confused, but I'm sure someone will jump in if I have it wrong...

Last edited by Slider78; 06-09-2011 at 08:48 PM.
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post #5 of 8 Old 06-10-2011, 07:35 AM
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I just got new wheels yesterday on my 03 I'm running -6 offset and I had to trim the plastic valence with 315s but no rubbing on the leafs. Hope this helped.
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post #6 of 8 Old 06-10-2011, 07:58 AM
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mine are 18x9 with 4.5" backspacing and -12 offset. no rubbing.
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post #7 of 8 Old 06-11-2011, 10:20 PM
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if your looking for sick rims in black I would look at BMF or MHT. Those companies both have insane looking black rims

2006 Ford F350 Lariat- "4" turboback, 6 Lift and 37's, EGR Delete and SCT custom tune soon
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post #8 of 8 Old 06-14-2011, 05:00 PM Thread Starter
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thanks guys going to look at bmf and mht!

03 F350 SRW CC LB 4x4
4" Lift, 33 Tires, Pro Comp Trac Bars.
CFM+ Largemouth KIT
MBRP 4" straight pipe
SCT By DJ
ISSpro Gages
Rack it Racks
===============
Debating Fass or RR
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