Rubber ages, dries out and gets harder over time. Doesn't matter whether you used your old shoes or not, they're probably hard by now. Replace the shoes or inserts and you should be OK.
If the rim surface feels rough or has bits of material half off, you might want to hold a bit of fine to medium grit sandpaoer again the rims while spinning the wheels to "lathe" the rims smooth again. Don't get carried away chasing any gouge to the bottom, just get the loose or high spots off.
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