with my dc2r b18c7 and stock itr gear box

i went 12.88 @ 113mph i was bouncing off the limiter in 4th gear bout 2 rev bounces before i crossed the line.............it didnt help that i was running 205/50/15 (23.2inches)

the height of your tyres can solve your problem if ur worried about shifting into 5th gear...hence im looking for 225/50/15 which will bring it upto 24inches....