Front Coil spacer lift, now tires’ outer shoulders are quickly worn out (even after alignment)
- Thread starter LCStve
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Post your alignment
Camber is s possibility. Toe in can be an issue too. What's your wheel setup? Too much offset and scrub radius has been known to more quick wear the shoulders too.
@tbisaacs recommendation is good if you can give us more context.
turbo8
Supporting Vendor
What spacer was used for this? A 25mm top hat spacer could cause damage if you don't put bump stop spacers on.
- Thread starter
- #5
I wasnt able to take photo of the actual numbers, this was few months ago,
But the alignment guy told me he followed factory specs using Hunter Alignment machine
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- #6
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- #7
Whats does a bump stop spacer look like?
I also have this problem, after using the OEM spacer, the outer shoulder will quickly worn out. I check the alignment, but the data are very 'perfect'.
after all I found out that the tire pressure is not enough, and the tire are running in flat sharp, so the shoulder worn out easily.
*I'm using KO2, 285/60/18, should use 43 psi +
after all I found out that the tire pressure is not enough, and the tire are running in flat sharp, so the shoulder worn out easily.
*I'm using KO2, 285/60/18, should use 43 psi +
- Thread starter
- #9
A shop recommended me to change the UCA
but as what I’ve read here in the forums, we only need to change UCA if the lift is above 2 inches..
My coil spacers’ lift is only about 1.7-1.8 inches
I hope someone who is knowledgeable in this can help
turbo8
Supporting Vendor
Post some pictures, so we can see what is going on.
I have the strong feeling I can provide some. Will switch next week from rear to back because I saw now after like two years after installing my spacers kinda what he described.
Will add the pictures later
If inner and outer edges are showing similar wear it’s probably high caster, since the tires lean when turning. It’s somewhat expected and you’ll still get most of the miles out of them
Some more tire wear on the tire shoulders of the steering axle are to be expected especially in the heavy pig that is the 200-series. Rotation can help. That said, there are definitely factors that can make this worse. Alignment, particularly toe and camber, but also suspension geometry including wheel offset (aka scrub radius). Caster generally has little to no impact on tire wear.
The OP has a pretty aggressive offset and IMO, that's the main contributor here. We tend to normalize +25 offsets as "good", but that's not really true. Offsets are correlated to overall tire diameter, i.e. larger overall diameter tires want less offset. When +25 is applied to an overall smaller diameter tire that is a 285/45r22 at 32.1" tall, it's very aggressive. The impacts to scrub radius is such that the front tires are fighting each other in turns, forcing scrub, and beating up the shoulders. Low profile tires exacerbate this as the small sidewalls don't conform much to side slip. It ideally should be in the +55 range. Larger overall diameter tires and taller sidewall would see less impact.
Some alignment adjustments can be made to help. I would recommend the OP dial in a touch of negative camber. Maybe -0.5° ish. OEM LC alignments call for flat or into a bit of positive camber, probably for braking performance as the front end tends to dive.
Offsets are critical to suspension geometry, so when using aggressive offsets, there's impacts to stability, handling, and braking.
The OP has a pretty aggressive offset and IMO, that's the main contributor here. We tend to normalize +25 offsets as "good", but that's not really true. Offsets are correlated to overall tire diameter, i.e. larger overall diameter tires want less offset. When +25 is applied to an overall smaller diameter tire that is a 285/45r22 at 32.1" tall, it's very aggressive. The impacts to scrub radius is such that the front tires are fighting each other in turns, forcing scrub, and beating up the shoulders. Low profile tires exacerbate this as the small sidewalls don't conform much to side slip. It ideally should be in the +55 range. Larger overall diameter tires and taller sidewall would see less impact.
Some alignment adjustments can be made to help. I would recommend the OP dial in a touch of negative camber. Maybe -0.5° ish. OEM LC alignments call for flat or into a bit of positive camber, probably for braking performance as the front end tends to dive.
Offsets are critical to suspension geometry, so when using aggressive offsets, there's impacts to stability, handling, and braking.
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Yeah this is stated much better than what I said. My only caveat is I had been told more caster will increase the shoulder wear in turns similar to more scrub so I’m still gonna argue that it has an impact but it may very well be minor in comparison to wheel offset.
finaly. Maybe it is just a feeling I think after adding the spacers the wear in the fron was faster or maybe it is just the age and mileage of the tires…
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