Hi tim,
In fact the new wheels don't need spacers but unfortunately they're already sold.
I have checked the tyres and they are pretty much 3 - 4mm all round.
2 tyres have slight uneven wear on the insides. But all in all they aren't bad tyres, I had them on the track last month and they didn't let out at all. For budgets they do a good job, no tramlining or cabin noise.
As many will say, tyres play an important part on these cars, so they will be good for a few more months untill you decide to get some upgrades!
Let me know if you want them as I'll get them ready for courier, my car is off the road ATM due to the new wheels. (All will be unveiled soon)