* Tire size: Different sized tires require different pressures. Check the sticker on your driver's side doorjamb. This sticker will specify the recommended tire pressure for your specific vehicle and tire size.
* Load: Are you carrying a heavy load in the truck bed? If so, you'll likely need to increase the tire pressure slightly (refer to the sticker on the doorjamb for details).
* Tire condition: Older tires might require slightly higher pressure to maintain proper inflation.
Where to find the recommended tire pressure:
1. Driver's side doorjamb sticker: This is the most reliable source. Look for a sticker with information about your vehicle's recommended tire pressure. It will likely specify the pressure for both the front and rear tires, and may also note a higher pressure for heavier loads.
2. Tire sidewall: The maximum pressure for your tires is printed on the sidewall of the tire itself. This is the *maximum* pressure, not necessarily the recommended pressure. Never exceed this number.
3. Owner's manual: Your owner's manual should also contain information about recommended tire pressures.
In short: Don't guess. Check the sticker on your driver's side doorjamb for the correct tire pressure for your 2001 Ford Ranger.
