Found out Tires not wide enough for my rim today need new tires now

[Swindler]

Quick question I got new rims for my G a couple months ago but I reused my rear old tires with my new front rims because they were pretty much brand new still, which they said would fit ok at the shop if I wanted to do that. So I had 245/40/ R19 tires put on my 9.5" wide front wheels. But then last night I came out after work and my front tire was flat and I put on my spare and drove home. I took it to the tire shop today hoping to get it patched cuz I did see a couple little pin size pieces of metal stuck in there that I thought might be causing the problem. But they said it wasn't leaking from those areas it's leaking out of the bead cuz my tires aren't wide enough for the rims and they can't get it to seal so now I have to buy 2 new front tires which is fine but it sucks cuz it was unexpected. I was put on the spot unexpectedly and had them order the tires so I'll go back in tomo and have them put them on. But is 245/40 really too small of a tire for 9.5" rim? I don't want to feel like I'm getting ripped off cuz I feel like I am. How is it all those stretched tire guys roll around fine and they can't get my tires bead to seal cuz it's just slightly not wide enough of tire?? It doesn't make sense. I have 255/35 I believe on order now for tomorrow.


Also another question is it ok to use the spare tire with my 20mm spacers on my Z? I hadn't thought of that before. Also good thing I randomly thought a few days ago to put 5 stock lugs in the trunk in case I ever needed the spare! Not sure my aftermarket lugs would have worked lol


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