IMHO it's not the LR or new water that will cause the cycle - it's the bio-load that you put in afterwards. In other words, if you just use old, mature LR (which was not exposed to air for more than a few minutes...) with new salt water, you will probably not have ammonia or nitrite spikes - however, once you then add some fish or corals, you could have a spike IF the amount of filtration bacteria in the LR is less than needed for the new bio-load. If you ramped up the bio-load slowly, adding only one smallish fish to the tank every 2-3 weeks, the bacteria will increase at a fast enough rate that there should not be any spike.
Hennie