I gathered this info when I was looking for spec e30 wheels. The rule
reads:
9.3.9.3. Wheels shall be 14 by 6 inches, 14 by 6.5 inches, or
15 by 7 inches, and shall weigh a minimum of thirteen (13) pounds. Any
brand, unless specified in these regulations, is allowed.
E30 wheels have a center bore of 57.1mm and a lug pattern of 4x100. ~25mm offset is typical, but people rock ET10 with a 15x7" rim.
| Name | Size | Offset | Weight | Note |
|---|---|---|---|---|
| 14" bottlecap | 14x6" | ET33 | 14.8lbs | all non-iS non-iX cars |
| 14" basketweave | 14x6.5" | ET30 | 14.3lbs | all iS cars and some eS cars |
| 15" iX basketweave | 15x7" | ET41 | ?? | all 325iX models |
| 15" Euro basketweave | 15x7" | ET24 | ?? | optional on all euro cars |
| Kosei K1 | 15x7" | ET27 | 13.5lbs | |
| Team Dynamics Pro Race 1.2 | 15x7" | ET25 | 15lbs | |
| Team Dynamics Pro Race 2 | 15x7" | ET25 | 13.3lbs | |
| Rota RB | 15x7" | ET25 | 14.4lbs | |
| Konig Rewind | 15x7" | ET20,ET40 | 15.4lbs,14.5lbs | there's a Konig deal for NASA |
| D-Force LTW5 | 15x7" | ET25 | 13.0lbs | now shipping from bimmerworld |
| Kazera KZ-M | 15x7" | ET25 | 13.75lbs | "replacement" for Kosei K1's, no longer produced |
| 949 Racing 6UL | 15x7" | ET10 | 13.1lbs | (not yet shipping) |
| TR Motorsports C1 | 15x7" | ET25 | 12.9lbs | now shipping from tirerack.com |
| Ronal Teddy Bears | 14x6" | ET35 | ?? | no longer made |