What causes irregular tire wear

88workcar · 10-15-2002, 06:43 AM

I was getting a new set of tires yesterday. The tire man said that my rear end needed alinement. The back tires were worn with a 3 inch wide space all the way around. And right off center. What would cause this? Far as I know you can not alline the rear end, am I wrong?

PKRWUD · 10-15-2002, 07:41 AM

All cars with IRS require a 4-wheel alignment. The rear wheels are adjusted for toe and tracking.

Take care,
~Chris

drudis · 10-15-2002, 08:32 AM

You can SQUARE the car (adjust wheelbase) with adjustable lower control arms, if the car is that far off...

2FastLX · 10-15-2002, 11:58 AM

If your rear axle is out of alignment it would cause the tires wear on one side or the other. It would be noticable by both tires having wear on the driver side, or both on the passenger side. Causes could be a bushing worn on one side, bent control arm, etc. Does your car "crab" down the road? Have someone follow behind you and see. Might be time to ditch those stock arms for some adjustable aftermarket offerings

88workcar · 10-15-2002, 08:14 PM

Thanks so far fellas, CHRIS IRS Come on man this is an 88. I didn't know that you post while your drinking

No really I just put bushings, welded the boxes, it don't crab. I think it was the non DOT approved tires, and under inflation. But they didn't last but three weeks, and they wore very irregular.

jimberg · 10-16-2002, 05:29 PM

If it's worn near the center of the tread, I would think they were over inflated. Do you have a picture of the old tires?

PKRWUD · 10-18-2002, 09:02 AM

Quote:

Originally posted by 88workcar
Thanks so far fellas, CHRIS IRS Come on man this is an 88. I didn't know that you post while your drinking .

Damn. Me either.

Take care,
~Chris

10-15-2002, 06:43 AM	#1
88workcar Registered Member Join Date: Oct 1999 Location: Pierre Part, La. U.S.A. Posts: 1,850	What causes irregular tire wear I was getting a new set of tires yesterday. The tire man said that my rear end needed alinement. The back tires were worn with a 3 inch wide space all the way around. And right off center. What would cause this? Far as I know you can not alline the rear end, am I wrong? __________________ 88workcar 1988 Mustang LX 342. 417rwhp @ 6800. 28 X 10 ET Drag, 4.30s, 10.69 @ 126.43 1.42 60ft. 11.13 @ 127.7 on BFGs 1.72 60ft Rice Hater # 42 To be old and wise, You must first be young and stupid I'm somewhere in tthe middle.

10-15-2002, 07:41 AM	#2
PKRWUD Junior Member Join Date: Mar 1999 Location: Ventura, California Posts: 8,981	All cars with IRS require a 4-wheel alignment. The rear wheels are adjusted for toe and tracking. Take care, ~Chris __________________ Webmaster: Rice Haters Club Jim Porter Racing Peckerwoods Pit Stop Support Your Local RED & WHITE!

10-15-2002, 08:32 AM	#3
drudis Moderator Join Date: Dec 1999 Location: Livonia, MI, USA Posts: 1,194	You can SQUARE the car (adjust wheelbase) with adjustable lower control arms, if the car is that far off... __________________ Darius Rudis, Moderator Corner Carvers Delight 1989 Mustang LX - Open Track Car http://www.dariusrudis.com

10-15-2002, 11:58 AM	#4
2FastLX The Photoshop Guru Join Date: Feb 2001 Location: Mecca, Indiana Posts: 1,419	If your rear axle is out of alignment it would cause the tires wear on one side or the other. It would be noticable by both tires having wear on the driver side, or both on the passenger side. Causes could be a bushing worn on one side, bent control arm, etc. Does your car "crab" down the road? Have someone follow behind you and see. Might be time to ditch those stock arms for some adjustable aftermarket offerings __________________ Project: 1988 Coupe - EFI 5.8L Twin Turbo with Victor intake, Canfield heads, F303 cam, March aluminum underdrive pulleys, TKO (or T56 if funds permit), PBR twin piston calipers and 13" rotors up front, 94 Cobra rear calipers and 12" rotors on the rear, 3.73's, Griggs K-member, tubular front control arms, torque arm and panhard bar, polished 99 Cobra wheels. "The GR-40 kit installation is now complete, and the humble Fox-chassis car will now out-corner and out-stop a ZR-1 or a Viper, and support massive horsepower additions with perfect balance." Griggs Racing ICQ# 42269241

10-15-2002, 08:14 PM	#5
88workcar Registered Member Join Date: Oct 1999 Location: Pierre Part, La. U.S.A. Posts: 1,850	Thanks so far fellas, CHRIS IRS Come on man this is an 88. I didn't know that you post while your drinking No really I just put bushings, welded the boxes, it don't crab. I think it was the non DOT approved tires, and under inflation. But they didn't last but three weeks, and they wore very irregular. __________________ 88workcar 1988 Mustang LX 342. 417rwhp @ 6800. 28 X 10 ET Drag, 4.30s, 10.69 @ 126.43 1.42 60ft. 11.13 @ 127.7 on BFGs 1.72 60ft Rice Hater # 42 To be old and wise, You must first be young and stupid I'm somewhere in tthe middle.

10-16-2002, 05:29 PM	#6
jimberg Registered Member Join Date: Oct 1998 Location: Rogers, MN Posts: 2,089	If it's worn near the center of the tread, I would think they were over inflated. Do you have a picture of the old tires? __________________ 351W 89 Mustang GT Convertible

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