Brian Lowell
Brian-Lowell.com

2008-2010 WRX
Size: 17x7"
Offset: +53
Bolt pattern: 5x100
Wheel Weight: 23.2
OEM-equipped tire size: 205/50R17 (2008), 225/45R17 (2009-10)

2008 STi five-spoke
Size: 18x8.5"
Offset: +55
Bolt pattern: 5x114.3
Wheel Weight: 28.x lbs (need more exact weight)
OEM-equipped tire size: 245/40R18

2008-2011 STi BBS
Size: 18x8.5"
Offset: +55
Bolt pattern: 5x114.3
Wheel Weight: 20.5 lbs (forged)
OEM-equipped tire size: 245/40R18

2011 WRX
Size: 17x8"
Offset: +53
Bolt pattern: 5x100
Weight: ~22lbs
OEM-equipped tire size: 235/45R17

2011 STi Enkei
Size: 18x8.5"
Offset: +55
Bolt pattern: 5x114.3
Wheel Weight: 23.x lbs
OEM-equipped tire size: 245/40R18
Notes: This wheel was also offered on the 2010 STI Special Edition, in a darker color.

2012 STI Enkei
Size: 18x8.5"
Offset: +55
Bolt pattern: 5x114
Wheel Weight: 26.6 pounds
OEM-equipped tire size: 245/40R18
Thanks to NASIOC for this information.
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