found this guy who races jags xjs and wrote bout the t1r, r1r and some r888
http://www.kutuka-north.co.uk/T1R.html
http://www.kutuka-north.co.uk/R1R.html
http://www.kutuka-north.co.uk/R888.html
pretty surprising how the r1r is as soft as the r888 but the thread blocks just shreds apart like the t1r.
so guess its either r888 or ad08 for the fronts