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NEED HELP, rims

4958 Views 24 Replies 8 Participants Last post by  tunnelpig10
I have a 2011 charger se and i want to put vossens on it but cant find any with a low enough offset
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I found some but they are +35 offset and i talked to somone a t a rim place and said i cant get higher then 20 offset
well, get a bolt on spacer (if the vossens have pockets between the lug holes you can go as thin as 3/4" (19mm) on the spacers, and the +35 offset becomes an effective +16mm.....
The rim shop told me that any higher than 20 offset would make the tires stick out way too much
lower offsets move the wheel centerline outboard, higher offsets, inboard. also, offset is measured from the wheel centerline, vs. backspacing, which is measured from the inside edge of the wheel....

a typical rule of thumb for a rim is its overall width is 1" wider than the rim width (rim width is measured bead seat to bead seat).

a stock RWD rim is 18x7.5 with +24mm offset (.945"). so the wheel mount face is offset outboard .945". backspacing on this rim would be 4.25+.945 or 5.195".

the AWD rims are 19x7.5 with + 51mm (2") offset. backspacing on this rim would be 6.25"

moving up to say, 20x9" rims, with the same +24mm offset gives you 5.945" backspace (5+.945), so half of the increased width is pushed inboard, half outboard. note the backspace is very close to the AWD rim, and having that much backspace on a RWD vehicle _might_ cause clearance problems to the inside of the wheelwell....20x9's with +35mm offset give you 6.38" backspace, and may actually work halfway decent with an AWD charger....

to get a 9" rim with the same backspace as the factory rims (5.195"), you'd only need .195", or +5mm offset. a 10" rim would need .305" of negative offset, -7.75mm offset.....
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Well, you're clearly not looking at a perfect fitment with wheels that have a 35mm offset. It might be made to work, but spacers will be required. Also, didn't you say the Vossen's have a 5x120 bolt pattern? That will have to be modified. My recommendation would be to pass on these and look elsewhere.

As I indicated in an earlier post, the "best" offset depends on the wheel/tire width. Without knowing that, its difficult to give you a meaningful answer.
different bolt pattern would be a non-issue with bolt on adapers....
Adapters for incorrect bolt patterns, wrong offsets...... you are asking for multiple problems, not to mention more stress on the suspension and brake components. There's a reason for using the proper wheels on the proper cars. But...... do what you want. It's your money.
no you're not, if done correctly...I know a little bit about loads and stress, I'm a mechanical engineer with almost a couple decades of experience with structural analysis and bolted joint analysis. if you use hub centric adapters and higher offset wheels (to give you the proper effective offset) then it really isn't any different than running lower offset wheels....a 25mm thick bolt on adapter and a +50mm offset wheel will load the suspension components the same as the same width wheel with a +25mm offset. my previous car, my hot-rodded 5th avenue, I wanted 17" rims of good quality, but didn't trust aftermarket chinese wheels. it just so happened that the mustang bullit wheels had the look, and strength (OEM quality, cast in the USA) I wanted, but were +30mm offset, and I needed +10mm (5.7" backspace, I needed about 4.95" to fit). Non chinese wheels were going to be $250 ea on up (the centerlines I wanted were about $400 ea), the OEM Ford motorsport bullit wheels were $129 ea. I bought a set of machined, hub centric billet 6061 bolt on adapters, and ran them with no problems for the better part of a decade, and eventually sold the tires and rims when I sold the car to someone who put them on his early 70's charger. the adapters were $190 for the set of 4.

Bolt on adapters will change the total wheel offset since they sit outboard of the hub to create a new mounting surface.
exactly. but the effective offset is the wheel offset minus the adapter thickness. so a 9" wide wheel, +50mm offset with a 25mm thick adapter effectively loads the car the same as a 9" wide wheel with a +25mm offset.....so if the vossens he found had significantly higher offset than he needs, using a bolt on adapter to get the proper effective offset could be a reasonable cost solution, if he can get the wheels for half the cost of new, and throw $200 worth of adapters to get them to work, sounds like a reasonable solution.
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