Widening Steel Wheels

[LowVeeDub]

I came into posession of some black 4x100 15x6 steel wheels. I'm getting them widended to 15x8. How do i find the correct offset so they fit the brakes and don't poke too far, as the process enables me to change the offset of the wheel to suit.. Any info would be great. Come on rayray i know you know the answer to this. Thanks in advance..

LVD

[Water Boy]

Gee what wheels are they? Good to find some woth a 57.1 center bore

When i had mine done the guy put centers into the new hoop and with the interference fit they stayed in that position...

Then we worked around 28-22 until we got it spot on but thats with 7"

[Golf Houso]

I came into posession of some black 4x100 15x6 steel wheels. I'm getting them widended to 15x8. How do i find the correct offset so they fit the brakes and don't poke too far, as the process enables me to change the offset of the wheel to suit.. Any info would be great. Come on rayray i know you know the answer to this. Thanks in advance..

LVD

You have to roll the guards... do that and you can anything with a 10-15+ offset. Go for a 0 offset

[peedman]

You dont have to roll the guards. If u have something like et38 then the wheels will sit within the guards. About offset 20 = flush guards, anything less = poke. My borbets are 16x7.5 et20 and 16x9 et15.

[Golf Houso]

You dont have to roll the guards. If u have something like et38 then the wheels will sit within the guards. About offset 20 = flush guards, anything less = poke. My borbets are 16x7.5 et20 and 16x9 et15.

Yes but that doesn't mean you havn't got massive poke on the rear

Rolling the guards will give you more breathing room and eventually provide a better look in the end.

[rayray086]

My steel wheels are 15x8, ET25 at the front (139mm backspacing) and ET15 at the rear (129mm backspacing). Both wear 195/50R15 tyres. They poke about... 5mm out the rear, and with some neg camber they look flush at the front. I've never rubbed at the front, but on some bumps on the road, they rub slightly on the rear - no tyre shredding though (rolled guards all around).
Edit: I just did a wheel bearing job so my alignment is out and have huge neg camber, and the front wheels (edge of the rim) actually sits inside the arches haha. Looks ridiculous though.

Some machinists that widen steel wheels will ask for a backspacing figure rather than offset, hence my inclusion of it here, but this can alter those offset values I gave depending on the barrel used, albeit not by a great deal as not all barrels are EXACTLY the same overall width (edge to edge). If your machinist takes offset values, then perfect! From asking around and searching, I've found 8" wide wheels @ ET25-30 will sit flush at the front, ET20ish will sit flush at the rear. This is only a very general figure, but is usually spot on!

As with fitment of tyres, 195/50 would be best for maintaining the stock rolling diameter, but 195/45 will provide that extra bit of clearance and IMO looks better. Stretch isn't a whole lot - just perfect for that "look"

[Mischa]

why not go 9" at the rear?