Why do BMW reccomend a higher tyre pressure for the rear tyres?

For my rear wheel drive 2005 (55 reg) BMW 5 Series new shape - Bmw recommend 33 psi front and 41 psi rear. Why is this?|||The 5 Series has a slightly heavier rear axel weight with monster trunk lid, fuel load, rear passenger load, and possible trunk luggage. The wider tires (staggered) on the rear will spread the load significantly. I think BMW was trying for a 50/50 balance but could not always control the car's loading when the cornering was in an aggressive handling attitude. I hope you got the RUN FLAT tires off your car, too.|||1. You may have staggered wheel setup. The rear wider than the fronts.


2. BMW wants your car to be have more understeering.





A regular driver can react to understeering(that front end dive when turning), but not so good to oversteering(the rear end swaying out on a turn), so for safety, BMW makes it more toward understeering.





I adjusted mine to 34 psi on all four non-stagger wheel to have a neutral steering.|||No idea, but I think most do. For my little KA it is 27 psi front and 29 back. Similar was true of the car I had before....not exact psi but that the rear tyres where a higher psi than the front. Maybe it is something to do with the braking mechanism? Just a guess.|||1.The rear wider than the fronts. 2. BMW wants your car to be have more under steering. A regular driver can react to under steering(that front end dive when turning), but not so good to over steering(the rear end swaying out on a turn), so it's for safety.|||BMWs are rear-wheel drive and having more tire pressure in back gives you better performance and handling. Bimmers are a different breed of car. There is nothing like the way they ride and handle.|||Most likely for better traction. For the way normal people drive there cars, it will probably not make a difference if you just fill up all tires with the exact same pressure.