I had a 2007 Miata, and
I had a 2007 Miata, and purchased a new canary yellow RX doughnut for a spare. It was a tight fit, but the 5 bolt pattern fit like a dream as a spare. You’ve got to put the doughnut on the front due to the Limited Slip Diff (some rotation of tires needed if the flat is on the rear). I traded my 2007 for a 2019 RF Miata. It has a 4 bolt pattern and a slightly smaller trunk. The RX doughnut won’t work, and haven’t tried a New Mazda 3 spare. After a 6 hr wait for a tow truck this weekend, I invested in a cheap plug kit, a can of Fix a Flat, a compressor, a small bottle jack, wheels stops, expandable lug wrench, & battery charger. If I get a sidewall nail, it’s a tow truck, but I’m trying to limit the mess I had this weekend. I did purchase an OEM jack (there’s a place for it in the trunk, but I understand only Canadien Miata’s come with the jack). The OEM jack fits nicely into the trunk slot, but you’ve also got to have the fitting bolt that secures it, and the 2 items needed to use the jack (hence my purchase of a bottle jack). No easy solution. I’m hoping the plug kit can take care of at least 80% of my flat tire issues. The car still must be jacked up when you have a flat (which the American cars don’t come with). AAA is a good idea. Mazda Road Side folks were very very nice, we just had bad luck with getting a tow service to respond. It would be nice to have a Miata OEM doughnut. The extra weight would be a good compromise in my opinion. Expandable after market lug wrenches are easy to purchase.