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Old 10-18-2010, 08:43 PM   #1
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same old alignment question TOE IN

wasted money paying someone else to do an alignment instead of me and a tape measure. i have read everyone says toe in should be about an 1/8 to a 1/4. mine was a quarter (set by me) and the shop changed it to 1/32. Is this to little. I am running 35"bfg's.
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Old 10-18-2010, 09:28 PM   #2
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I took the info from the factory service manual and calculated it out to be 5/32" at 30" as being optimum spec, according to the factory numbers. So I'd say 1/32 isn't enough.

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Old 10-19-2010, 09:59 AM   #3
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IMO any of those are decent for the jeep on 35s. Lift the jeep up and wiggle the tires back and forth. I bet that they move more than a 1/8" at the front of the tire.
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Old 10-19-2010, 10:10 AM   #4
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1/32 total toe is going to be fine. I wouldn't expect any issues arising out of this setting. The thing about OEM specs is they are for OEM suspensions. Yours is not. lessening the Total toe will lessen the wear caused by toe angles on your wider than stock tires. If it drives fine It will be better off IMO

If you have wiggle when you shake the tires, you need to be replacing components. There should not be play in front end/steering parts.

I used to do this for a living. But as always YMMV.
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Old 10-19-2010, 10:52 AM   #5
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Typically, the usual recommended toe-in is 1/16" to 1/8" and 1/4" is way too much. The bigger the tire's diameter, the less toe-in that is desireable so 1/32 is not out of line.

The two below pics show a very good way to measure your toe-in more accurately (and repeatedly) measure your toe-in than is typically obtained when just measuring between the tires.

It requires nothing more than a pair of 1" square aluminumum tubes and spring clamps. Mark the tubing at points equal to your tire diameter and measure between the sides at those marks.
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Old 10-19-2010, 12:24 PM   #6
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It's going to be somewhat dependent of the wear on your suspension. As the tire rolls there is pressure from the street trying to push them apart - to toed out.
Setting it slightly toed-in to start with compensates for that pressure - eventually equalizing to a straight ahead position - when they just roll without scuffing. (Scuffing is actually removing rubber!)

The more everything is worn, the more it toes out when driving.
If the suspension is new, set it to slightly less toe-in.

The real proof is in the results.

Keep an eye on the tires and how they wear. After 500 miles or so - Lay your hand flat across the tread. You can "feel" how it's doing. You can feel if one side of the tread is wearing more than the other. That's camber - not easy to correct on a Jeep.

After you feel the crown, drag your hand back and forth across the tread. Notice the grooves - the edges in particular. If the inside edges of the grooves feel like sharp corners and the outside edges feel more rounded, then it has too much toe-in. The tire is sliding sideways slightly on the road (scuffing,) causing inside of the groove's edge to feather a little, the other side will feel slightly rounded.
If it is actually making a feather edge it's waaay off! Both sides of the groove should be about equal.

Notice how an experienced alignment guy looks at it - he "looks" then "feels" before he tells you what's needed. It's all right there if you know how to "read" it.

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