A friend of mine changed over to bead lock rims and
he can get about 10 more passes on the tires over what
he use to(mid 8 second door car)... I can tell how
many runs are on my tires based on the 60'... I get
a 1.19 60' for 20 passes, 1.20 for 20 passes, 20 at
1.21 then it tends to hold at 1.22 but I usually replace
them when it hits 1.22... the tire still has PLENTY
of wear indicator hole left on them..this is with
tubes in them... I got more runs on the M/T but never
got a 1.19 60" they normally ran 1.20 but for about
50 passes then they fell off.... I never ran G/Y so
I dont know about them but I hear they are softer for
the bite but shorter life
Oh yeah... I run screws on them... 14x31.25 on a 12" rim