Tighter the fit the easier they are to inflate, bit of soapy water helps or spit if you have enough. Lol.
A lad we go out with put a new minion on the night before we went out, pulls the bike outta the van and says he can't wait to try it out, ive never seen a worse buckle in a wheel lol. Says aye it might have been a bit tight to get on. Lol. He must of been jumping on it. Lol.