View Full Version : 280i Rear End 4.20?

09-15-2009, 04:09 PM
In 4th gear (1.0) at 3000 rpm my car is going 75 mph. I have 245/45/17 tires.... I was thinking that all the 280i US cars had a 3.08 rear? It looks like my car has a 4.20 ratio any thoughts?