)they are awsome. I did use the GPR70's on my NC30 and if ever the 208 is stopeed in NSR size ill go this route, Had bt90's good tyre but never pushed them so cant say much about them , and the right size makes all the diffrence, The SE i had came with a 160 rear and after riding that i think monkey did a really good job at donnington getting round the corners with his 160 he had on at the time, the bike felt unhappy with a 160, no confidance, BUT that could just be me not being used to it!!!!