Originally Posted by Olivier_TFE
For reduce underteers, better bigger say bar front or rear??
A lot depends on the car and what you are doing with the front grip.
For us, we like to increase front tire size and widen the front track. For example, a well set up e46 likes a lot of front camber/track and does not need a lot of rear sway (less rear sway helps put the power down).
For the 135, if you are not increasing the front tire, then increasing rear sway may work.