Listed on the driver's door post. The OEM size for the Ram 1500 2wd is 225/75-16.
The 235/75/16 is larger.
OEM size is 225/75-16 Largest tire you should install with modifications is 245/70-16
Yes you can
No you should not you use 225/75-16 on a car that came with 215/65-16. This is a 7.79% difference in diameter which is never recommended. You should never go over 3% difference. Your speedometer will read 55.3 at a true 60 mph. Your handling, braking, ride, and performance will suffer with this size. There is no 75 series tire that will work well on this vehicle. You can however switch to a 195/70-16 if you are determined to go with a different series tire. I would recommend you stick with the OEM size.
Doubtful, the 225/65 tires are narrower and shorter.
The way you have phrased your question is confusing. If you are saying that the 235/70-16 is the OEM size the answer is NO, this is not an acceptable swap. Going either way this is a bad swap. If your OEM size is 235/70-16 and you want to go to a 75 series tire then you need to install a 215/75-16. If your OEM size is 245/75-16 and you want to go to a 70 series tire then go with a 265/70-16.
225/75-16 or 255/65-16
A 225 75R 16 tire will fit on a 245 75R 16 rim. The only difference between the tires is the height of the sidewall.
20 centimetres more treadwidth. Should still fit on most vehicles.
No you should not you use 225/75-16 on a car that came with 215/65-16. This is a 7.79% difference in diameter which is never recommended. You should never go over 3% difference. Your speedometer will read 55.3 at a true 60 mph. Your handling, braking, ride, and performance will suffer with this size. There is no 75 series tire that will work well on this vehicle. You can however switch to a 195/70-16 if you are determined to go with a different series tire. I would recommend you stick with the OEM size.
225 and if you mean both(all the numbers) it is 450