| front: -- 7.5" width -> +16 - +57
 -- 8.0" width -> +23 - +50
 -- 8.5" width -> +29 - +44
 -- 9.0" width -> +35 - +38
 -- 9.5" width -> not generally possible
 - rear:-- 17x8.5 -> +22 - +55
 -- 17x9.0 -> +28 - +48
 -- 17x9.5 -> +34 - +42
 -- 17x10.0 -> not generally possible, though +41 has been done
 -- 18x8.5 -> +22 - +64
 -- 18x9.0 -> +28 - +57
 -- 18x9.5 -> +34 - +51
 -- 18x10.0 -> +39 - +45
 These are general guidelines and members report satisfactory fitment outside these parameters.
 From the summary in this post: [ http://www.twinturbo.net/net/viewmsg.aspx?forum=technical&msg_id=935775 ] 
  Chance favors the informed 
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