No, that would cause the speedometer to be off as there would be 1" difference in diameter. You can replace 215/55-16 with 235/50-16 which would both be 25.3" in diameter. You must keep the diameter as close as possible to the same 25.3" diameter as the OEM tire.
No the rim and tire are too big.
NO, they can not.
Nope. the R15 and R16 are the size of the rim on the vehicle. they are not interchangable and must be the same.
The tire sidewall will list the max pressure. Check the owners manual or the driver door jamb sticker for the correct pressure for a vehicle
Replace the tire
Not with out changing the rims. a 205/70/R15 is 205mm tall 7 inches wide and 15 inches is the rim size. So with tire size 215/60/R16 you would need a different rim. This is not even taking in to account that you might have clearance issues or issues with your speed sensor.Opposing Opinion.Yes, you can switch to this size tire/wheel combination. The 16" combo will be .14" smaller in diameter and .39" wider. You speedometer will be .3 mph too fast. This swap will work with no clearance issues at all.
Yes , you can replace a 205 50r 16 with a 205 60 r 216. You must replace in pairs, not a single tire.
The best idea to replace a tire which has a whole in it is to replace it with a new one. Reason as to why you should replace it because the tire can wear out and blow out sooner with a whole in it.
Yes you can
Generally requires removing and dismounting the tire, replace TPMS sensor, remount tire, balance tire, re-install tire to vehicle, do the relearn tire position procedure.
You can not replace just the tire pressure sensor on a Boxster. You will need to replace the whole sensor. The sensor is located inside the tire assembly.
Yes, it is possible.