Ive noticed whilst at a drift day my front nearside tyre keeps deflating. its fine whilst on the road only happens after 5 mins of skidding. anyone know what could be causing it? tyres are 215/40/17 federal RSR at 40psi on 17 x 9 bbs LM's
making a guess. wheels 9j with a 215 tyres so they are streched on. i would also guess that the offset of wheel is negative of wheel spacer so the scrub radius is wrong. So tyre has a side loading force thats pulling tyre off the bead.
Beading on the wheel is probably broken. Get a tyre place to re-bead the wheel, or speed up your steering reaction time