i got 23's for mine as thats what the other tyres were that came with it. ill keep an eye out for bits of metal lol
Spooly.
A bit of advice mate.
Get into the habit of checking your tyres after every ride.
Dig out any little bit of stone, glass and crap that is sticking in/on the rubber.
If you leave it crap does work it's way in to the tyre. This is especially true after a wet ride.
It is a pain to check, but get in to the habit and it soon become second nature.
You will save your self a lot of grief and hassle and your tyres will last much longer.