anybody know a good reference source that shows the calculations to find the biggest diameter tires to put on any given car without changing the specs that affect steering/cornering/driveability?
no because in real life,most people realize that a car or truck is manufactured for a specific tire size and just replace them with what the manufacturer designed the vehicle for. Anything that is different or oversize starts running into clearence issues and in many cases costs more money, but does absolutely nothing to add to stability or improvement for the vehicle. In fact raising a vehicle, putting bigger tires on messes up the center of gravity and can increase the chances a vehicle will roll at higher speeds. Some shops will not even mess around with oversize tires, people want to try different sizes, but do not want to pay for all the work it takes to mount and dismount a tire, for no other reason than cool factor.Some tire shops flat refuse to do anything beyond what rhe factory recommends.
Tire size will have no affect on camber and caster. It does not matter if you have a 20 tire or a 60 tire the camber and caster will always be the same. The only thing that would change with tire size is the toe setting but it would be a very small difference unless you were changing tire height by like 6 or more.
