wheels are fine, ball cups are old, bump straight(i need to get a new set when i have some$$$$). See, i had the turn.. the same length, then at the end of the race, the inside threads on the right side, go from , big exadration, 5 cm, to 2.5 cm. They reced into the ball cup stud, thing, lol. i guess it is the threads, well, i'll have to se my last back up, i better not break now. Also, should i run 4r 4f setup for a really slick track, carpet but slicker than ozite, it's something weird. But very slick, i just need loads of grip, if i traction roll, i 'll be happy, and can downsize then.