Originally posted by MR JOLLY
Q) what is the difference between the rear pink & grey both 30 shore
ON the track-PInks provide more side bite and more forward traction than Greys. What some of us do in stock is to run PInk rears till traction comes up and then switch to Greys. If you can go 8-minutes without car getting loose-then you should be faster on Greys.
IN mod-your most likely going to remain on pink rears the whole race day.