2002 Ford Ranger 60 mph shake

I had new tires put on my truck blanced but not sure if it was aligned, but either way when driving, the truck shakes once you get to 60mph but if you go over 75 mph the shake stops, any suggestions Im going to have an alignment done this weekend, one other thing the shop at the corner who monted and blanced the tires told me they had to grind my rims for about 2 hours to get them to balance and hold air. I was think about getting the alignment and rebalanced?