I often compare tires at the Miata Tire Size Calculator that can be located via Google.
A 215/65/15 is different enough from the original 205/75/15 that I'd personally avoid it. It's 4.1% off, so when the speedometer reads 60 the vehicle is travelling 57.6.
If a 235 section width will fit under the van, a 235/65/15 is only off by 0.3%, so when the speedo reads 60 you're going 59.8. I don't know if that wide of a tire will fit one of these minivans though, as it's about an inch and an eighth wider.
A 215/65/15 is different enough from the original 205/75/15 that I'd personally avoid it. It's 4.1% off, so when the speedometer reads 60 the vehicle is travelling 57.6.
If a 235 section width will fit under the van, a 235/65/15 is only off by 0.3%, so when the speedo reads 60 you're going 59.8. I don't know if that wide of a tire will fit one of these minivans though, as it's about an inch and an eighth wider.
