Should I cange LR UCA setting?

Recently went back down to 265/75/16 tires from 285/75/16 tires. I have the LR UCA set at the +2.0 setting (with the logo facing the wheel). Should I change the setting on it to the 0.0 setting now that I have dropped down in tire size before I go get an alignment? I am running the Maxtrac spindles if anyone thinks that information is needed to make this decision.

Thanks in advance


EDIT : Just realized I typed cange instead of change

 

Tire size will change the handling a little but it doesn't change your main alignment angles. I'd leave it be.

 

I was thinking that they may not be able to get the alignment within specs for my truck with the UCA set at +2.0 and with me changing the tire size to a smaller tire.

 

Tire size doesn't effect alignment angles. Should be fine.

 

Why are you set at +2 and not at 0?

 

I set it at +2 before I installed my 285/75/16 tires to allow the alignment shop to try and get the alignment within specs. With it set at +2, it allows caster adjustment from 0.0 to +4.0, or at least that is what I read.....

With me having the Maxtrac spindles, all of my front end geometry should be back like it would be as stock, correct?

This is why I was asking if I should set the UCAs at 0.0 since my front end is theoretically back to stock with my Maxtrac spindles....?

 

Any other opinions out there?

 

^^ this. we can all chime in and say this all day. changing tire size does not affect alignment.

 

This

 

ya I didnt get a new alignment when I put my smaller winters on and its fine.

 

changes in the suspension geometry and whatnot require alignments afterwards, tire swaps don't

 

This. Typically guys with ~3" lifts have the UCAs set to +2 to make up for the lost caster when adding longer springs. I guess i am not very familiar with spindle lifts, but i have read spindle lifts don't screw up your alignment like a 3" coilover lift. So I'm thinking you should be able to set the UCAs at 0 and still be in spec. Doesn't matter though if your alignment is already good, just thinking out loud and looking for some answers.

 

Wait a minute. So should I change my LR's to +2 from 0 with my Icon set up? I'm around 2-2.5" in the front.

 

The neutral setting with the spc logo facing the tire adds +2 caster
After i lifted 2.5 inches i lost almost exatly 2* of caster, the nuetral setting (+2) got me 2.7*
What i am wondering is do spindle lifts cause you to lose caster like coilover lifts

 

I did, pulls the wheel forward and lets you add caster to bring them to the spec the should be, about 2.5-3

 

Neutral , SPC logo facing out ( +2 caster ) put me at about 2.7 caster before we messed with the cams with my 2 1/2" , OME 885 lift

 

Most alignment places don't deal with adjustable UCA's

 

Only if the mechanic knows how to adjust the LR UCA's. Most guys here set them at +2* themselves, and then the mechanic will mess with the LCA's and tierods.

 

Plus you are going to have to lift the truck, pull the tire off and possibly disconnect (if I remember correctly) the spindle

 

Good to know thanks. I have minds set with the Logo facing out. Forgot where that placed the caster