Flat on New Tire

Need recommendation.

I just bought a new rear tire for my Swing, barely has 30 miles on it.  
It now has a flat.  Should I buy new or get the new tire fixed?

Appreciate y'all recommendations in advance.

You could view it like Good, Better, Best ....

GOOD: Plug the tire with a Deluxe Tire Plug Kit from Walmart, Slime brand, around $10.00. This assumes the screw or nail or piece of metal that caused the flat is in the middle of the tread and not near the sidewall, and  it comes out smoothly.

BETTER: Plug the tire and take it off the bike to place a patch on the inside of the tire. That's twice the protection with inside patch and outside plug.

BEST: Bite the bullet and get a new tire for maximum safety.

Personally, I've ridden thousands of miles with tires I plugged. I'm fine with GOOD. That's partly because I plug tires well and partly because I'm too cheap to replace a tire with low miles. With the life of these tires at 7,000 to 10,000 miles, and me averaging 1,000 miles a month, I don't have to ride on the plugged tire all that long. I will add that I always have some kind of TPMS on my tires, new or plugged, so I keep an eye on pressure every time I ride.

Another option would be to have the tyre repaired by means of 'vulcanizing'. This method remoulds the rubber over the repair. If you don't like the sound of a repair, just replace it.

Since rear wheel removal and replacement is such a hassle on SilverWing.....remove wheel and replace tire with new one=much safer....If you cannot do this yourself you are at the mercy of the people who provide this service. In the US you usually get the least skilled doing this work. Have spare exhaust gasket standing by---dealers usually to not have in stock...for bike that has been out of production for 10 or more years. Having somebody doing the work, check their work. Most scooter dealers in US do not or can not balance scooter wheels---"Ride ON" works for me as balance medium.

My case I would remove tire, if not much damage to carcass, patch from inside, re-balance and ride.

In US most bike shops do not repair bike tires. In Japan they do.

I would go for the 'better' option and have the tyre professionally plugged from the inside. All the external repair kits I've seen or used state they are short-term and low speed, I've cautiously ignored the latter but have always changed the tyre as soon as practical.
If I was just riding short distances around town I might be tempted to ignore the short-term bit too, but I'd have to slap myself if I had a second flat miles, from anywhere, from the same puncture.

It it flat because there's visible signs of a puncture like a nail or a piece of metal in this new tyre. Or it could be air leaking from the seal on the ageing rear tyre valve causing the problem.

I don't find removing the rear wheel any great hassle. You could have a new tyre fitted and have your punctured one repaired to keep as a spare.

The OP still hasn't been on again to say whether the tyre was flat due to a puncture or not.

As it was a new tyre with barely 30 miles road use, it would be real bad luck to get a puncture when the tyre isn’t even scuffed in.

It may be that the tyre bead hasn't sealed 100% to the wheel rim due to corrosion, or was damaged during removal of the old tyre or when fitting the new one.

Or as I mentioned earlier, that troublesome angled rear tyre valve could be the culprit. Whatever the reason it's hassle you don't need.

Anyway enough of this, I have to scuff some rubber of my own this morning. I have a very nice new pair of short motorcycle boots and a nice long stroll up to Tesco and back later will do the job.

Yes, we're all assuming he has a puncture. OP, please can you confirm what has caused your flat tyre.

Thanks to all who answered. You guys are fast.
I discovered that it was a 1 1/2" wood screw. I pulled it out.

I have decided to take the "BEST" [Get a new tire] advice of Delray and Loosemarbles [repair
the almost new tire, and use as a spare].

I bought both front and back Pirelli Diablo Rosso tires at the same time. Currently, I can't find
the rear 150/70-13 in the same brand as the front online. Should I wait for the brand to come
back in stock, or am I ok buying a different brand? Thoughts? Recommendations?

I don't like mixing tyres but wait for some input from other members who have more experience and knowledge on tyres.

Back in the sportsbike days I used to worry about mixing tyres, but tyres weren't as good in the '90s and we rode a lot faster.
These days I happily mix manufacturers provided they are of the approved sizes and type, I have never noticed a riding difference on either scooter or road-bike, at least not at the speeds I do these days.
The handling problems have always come when the tyres are worn too far out of profile, or the one time I was forced by availability (or lack thereof) to go oversize, it looked good but handled like a plate of spaghetti!
Having said all that I don't know where you are, legal type approval or insurance issues might force your choice.

Ok, if my original tire [Pirelli Diablo Rosso Rear Scooter Tire (150/70-13)]
doesn't come back in stock soon for a reasonable price [originally bought
from RevZilla for $85]what brand of 150/70-13 would best match my
Pirelli Diablo Rosso Front Scooter Tire??

I happily mix tyre brands to get the best of each.
The Pirelli Diablo I use on the front for hold in the wet and dry.
I use a Mitchelin City Grip for the rear as they last pretty long (compared to a Pirelli on the rear), wear round and still grip fairly well.
That is 2 of the only 3 kinds we can get here.....