In Reply to: 27/22 vs 26/24 sway bars, which one u prefer?? posted by Kim J. on October 04, 2000 at 21:41:58:
A 26/24 would not only firm up the body roll tendency (front and rear) but also get rid of the understeer...which is what you want.
26/24 is ideal to accomplish both...less roll and get rid of the understeer.
Here's the math formula for the difference in stiffness:
(d2^4) / (d1^4 + d2^4) X 100 = % Difference in Torsion Stiffness
d1 = original diameter
d2 = new diameter
Stock ('96 thru '99 M3):
Front (27mm) = 90% increase
Rear (22mm) = 46% increase
Note: Since the front's 90% is larger than the rear's 46%, you will have even more understeer!)
Front (26mm) = 63% increase
Rear (24mm) = 107% increase
Note: Since the front's 63% is less than the rear's 107%, you will have less understeer or maybe a slight oversteer.)
The 26mm front and 24 mm rear is the set to install for reduced body roll "and" to reduce or eliminate the understeer in a '96 thru '99 M3.
Hope this helps.