Re: How Much Rubber TQC

[glen.powell@smc.com]

  Not sure what you mean by "didn't fit".
  Didn't fit the wheels or didn't fit in the rear
  wheel wells once mounted on the wheels.....

  My 225-50-15s are on the stock OEM
  late-model ur-Q Ronal R9s in 15x8". The
  stock tire was the P7R in 215-50-15, so
  the 225-50-15 is only marginally larger.
  The 225s did contact the inside of the
  WWs when autocrossing, but not in a
  big way, never hit on the street though.

  I would guess that 225-50-15 tires are *WAY*
  too wide for 6.5" rims, the tread and sidewalls
  will be very distorted and you will get a lot
  of sidewall flex, poor turn-in, etc. This distortion
  of the sidewalls might be what caused the
  clearance problem in the rear. Also, only the
  late-model (>= '85) ur-Qs have the new, larger,
  wider rear valence and factory rolled inner
  fender lips to allow fitment of the 15x8s and
  the 215-50-15 P7Rs. Older ur-Qs have a
  narrow rear valence and the protruding inner
  rear fender lips.

  -glen