MK4 Rear Tire Rubbing Shocks

[rsbrillhart]

Building a complete kit MK 4 with IRS and Koni coil-overs. Decided to go with the 17" American Muscle Mustang Bullitt Wheel and Mickey Thompson Tire Combo (as was recommended and others have used I think). 17x9 275/40 front and 17x10.5 315/35 rear. When I tighten the rear PS, it bumps up against the coil-over. Just barely, but definitely touching. I've read other rubbing posts, but haven't seen this issue. Can I simply put some spacers on the hub posts to move the wheel out? If so, how much is acceptable from a safety standpoint? Assume 1/4 is ok?

Took a risk not buying the FFR Halibrand wheels, and now hoping I don't have send these back.

As always, appreciate any advice.

Randy

[CraigS]

Have you set the alignment yet? I have never seen anyone else have this problem. I am thinking you may have too much negative camber so the top of the tire is tilted in toward the center of the car. If you are not ready to do a full alignment, at least adjust it so the tire is vertical (or 90 degrees to the floor) when the car is on the ground. A quick comparison w/ a carpenter's square is good enough.

[edwardb]

Agree you need to check the alignment. Certainly could make a difference. But in the end, how does the offset of the wheels you chose to use compare to the offsets of the Factory Five Halibrand wheels? They too are pretty close, but clear when everything is finalized. Wheels spacers are not a problem if reasonable. Many of us are using 1" spacers on Coupe builds with no issues. Just make sure you use hub-centric spacers. Much superior to those that only index on the wheel studs. Also you'll need to watch body clearance on the outside. So don't get carried away.

[jrcuz]

I agree with Craig, in fact he did my front and rear alignment and before he started my p/s rear was the same way. After alignment no problem.
JR

[Caddy Dad]

X2 on edwardb post. First time I mounted mine, they rubbed, Then did rough alignment and all good.

[rsbrillhart]

Thanks guys. No, haven't done an alignment. I'll do a rough one today. Hopefully that will clear it up like the rest of you.

The Backspace/Offsets are almost identical to the FFR Halibrand wheels: 6.7"/27mm vs 6.8"/28mm

Appreciate the advice.

Randy

[edwardb]

Thanks guys. No, haven't done an alignment. I'll do a rough one today. Hopefully that will clear it up like the rest of you.

The Backspace/Offsets are almost identical to the FFR Halibrand wheels: 6.7"/27mm vs 6.8"/28mm

Appreciate the advice.

Randy

Then no reason for them not to work.

[SteveHsr]

Just want to add that use of spacers (1/8,1/4,3,8) to optimize clearances is good idea. Tire deflection when reasonably hard cornering can result in rub.

[rich grsc]

Just want to add that use of spacers (1/8,1/4,3,8) to optimize clearances is good idea. Tire deflection when reasonably hard cornering can result in rub.
??? Shocks are above the tire rim at the ground, deflection would be in the tire at contact with the ground. Maybe play in the differential?

[GoDadGo]

I'm not a fan of wheel spacers and pattern adapters nor will I ever be; however, I saw this company a while back so I figured I'd share their website with the group.

They seem to have tons of different products for all sorts of applications, appear to be high quality, are Made In American, plus they will do custom one-off items.

http://www.motorsport-tech.com/