I found that once grip got up, the 2.7F and 2.5R combo is a bit too pushy. I've dropped the front down to 2.5F, and used the progressive 2.3-2.6R in the rear, seems to give it a nice balance, but still easy to drive.
Anyways, just picked up some RSD asphalt progressive spring set. Anyone know the ratings as compared to the Xray springs?
-Purple: 18.4-19.0 lb/in
-Red: 17.1-18.0 lb/in
-Green: 15.2-16.0 lb/in
-Silver: 14.8-15.8 lb/in
-Yellow: 14.5-15.2lb/in