different wheels..... I just swap bikes and use my SS road bike on 700x25 slicks. everything is frozen anyways.
when things get soft I'll ride my 29er hardtail. However soft wet packed limestone on a 2.35 29er isn't enough float sometimes.
The salt has destroyed both as I don't have a descent place to wash/dry in the winter.
So basically if you'r going to ride salt, Buy a beater!