To shave my used RA1s or not to shave.....
In preparation for my track day at Laguna Seca on June 30th, I am getting my tires setup. For the past year of track and autocross I have ran shaved 275/35/18 RA1s in the front and full tread 305/35/18 in the back. The setup has been amazing and I was unable to push the tires to their limit at the track. Although I do often push the tires to their limit and beyond at autocross.
So I recently chorded the shaved fronts and am getting pretty low in the back. The backs seem to be a bit more slippery than I remember, but I may have also been pushing them harder than normal at the last autocross. So I picked up a set of fronts that have tread, and now I have 4 unshaven tires. To enhance front grip and refresh the rears life I was thinking about shaving all 4 tires for Laguna Seca. So I was just wondering everyone's thoughts and was also looking for anyone who has experience with full tread RA1s vs shaved. I worry about grip in the front and have contemplated trying 285/30/18s possibly.