OME 913 springs

[Ldub]

Am I understand correctly that OME 913 will give around 1" lift to the rear? My stock springs shrunk with the time, so I'm thinking to replace them with something (either OME or new stock springs) that will allow to fit TRXUS MT 265/75R16 or so in the future. I think this will give me enough clearance while not loose the driving comfort. I don't wish to end up with the spacers and don't wish extra lift, but I wish to let max suspension movement with that tires without tearing of fenders. Will 1" enough?
Another question: Are OME 913 variable rate coils like the stock ones?

OME 912's give lift of about 2" or a little more & are single rate.
They are about the same length as stock springs(with no load), just made of heavier ga. material.
I know you don't want spacers, but that would seem the most economical solution. Also, cutting the rear bump stops in half vertically improves the ride a little.
265/75x16" tires are approx. 31.6" in diameter compared to 29.5" for stock & should fit with a little trimming of the front cladding...if you're mounting them on stock rims.