PMK
Active member
First step in a wheel alignment is to establish the belt position on the pulleys then set your laser targets equal distance to either side from the rim or tyre. Front end is then set from that position the rear wheel is in so any messing with belt adjusters after the alignment stuffs up your alignment. Changing the tyre and moving one adjuster more than the other or tensioning the belt with just one adjuster and you've wasted your money paying a professional to get it spot on. If you want a cheap alignment make up some measuring sticks one an eight of an inch longer than the other and set your toe in to that. That way if you want to forget about whether your back wheel is aligned to the fronts you haven't wasted your money.
That may be how you accomplish laser alignments when you do them yourself. First off, if a Spyder arrives with a correctly tracking belt, there is no need to make any adjustments to correct something not needing adjustment.
The joke of laser aligning, is setting the targets, all this is done with a tape measure and is not precise.
Therefore, if a person did have a laser alignment, done correctly, and the drive belt is tracking properly, changing a rear tire, then reinstalling the rear wheel, making no adjustments to tension, and then verifying the belt tracks as it did before, there will be no change or ill effects to the existing alignment. Then again, if a ham fisted hack installs the rear wheel after tire change, then any sort of issues may present themselves.
I gladly welcome more discussion from you regarding your methods or techniques for accomplishing laser alignments. I know my ROLO equipment should be used more, but just sits, stashed away.
Regarding using the measuring sticks you mentioned, I have a set of production toe sticks that very accurately can measure a vehicles toe setting. They also can measure camber and caster. I have used the toe sticks many times, aligning not only Spyders, but cars, trucks and our van. Super easy and very accurate. Far less effort than setting up ROLO laser alignment equipment, and done correctly, equally as accurate.