ever since i put my new rims and tires on the car it hasnt been traping at the same speeds...i put on 15x8 weld prostars with 275 50 15 mickey e/t streets and im traping at 103 when befor that i was traping at 105 with my 245 45 17 nitto 555rs. does any one know why?

 

maybe track conditions or the 275 on a 15x8. has your ET or 60FT changed?

 

I believe that is common when switching to track wheels. Your trap drops but your numbers are lower from the faster 60'.