Tires: tire sizing, chevy blazer, tire sizing

Question
I just bought a 2005 chevy blazer with 265 75R15 on it however my spare is 235 70R15 is that ok or should I have some concerns

Answer
Pete,

I suspect that the spare is from some other vehicle and may not fit.  So it would be best to check the fitment.

Also, find the vehicle placard - I think it is on the driver's doorpost - and see what the original tire size was for the vehicle.