2009 Porsche Boxster Wheel Backspacing
5.42 in · 6.24 in · 5.67 in · 6.42 in · 6.22 in
Quick specs
- Backspacing
- 5.42 in · 6.24 in · 5.67 in · 6.42 in · 6.22 in
- OEM offset
- ET55 · ET57 · ET50
- Wheel size
- 6.5x17 · 8x18 · 8x19 · 7x17 · 8.5x19 · 8.5x20
- Bolt pattern
- 5×130
- Tire size
- 205/55R17 · 235/40R18 · 235/35R19 · 235/30R20
OEM configurations
| Configuration | Front | Rear | Offset | Backspacing | Tire | Bolt pattern | Center bore | Thread |
|---|---|---|---|---|---|---|---|---|
| 2.7 · 2.7L, M 96/25, F6, Petrol | 6.5x17 | 6.5x17 | ET55 | 5.42 in | 205/55R17 | 5x130 | 71.6 mm | M14 x 1.5 |
| 2.7 · 2.7L, M 96/25, F6, Petrol | 8x18 | 6.5x17 | ET57 / ET55 | 6.24 in | 235/40R18 / 205/55R17 | 5x130 | 71.6 mm | M14 x 1.5 |
| 2.7 · 2.7L, M 96/25, F6, Petrol | 8x19 | 6.5x17 | ET57 / ET55 | 6.24 in | 235/35R19 / 205/55R17 | 5x130 | 71.6 mm | M14 x 1.5 |
| 2.9 · 2.9L, MA 120, F6, Petrol | 7x17 | 7x17 | ET55 | 5.67 in | 205/55R17 | 5x130 | 71.6 mm | M14 x 1.5 |
| 2.9 · 2.9L, MA 120, F6, Petrol | 8x18 | 7x17 | ET57 / ET55 | 6.24 in | 235/40R18 / 205/55R17 | 5x130 | 71.6 mm | M14 x 1.5 |
| 2.9 · 2.9L, MA 120, F6, Petrol | 8x19 | 7x17 | ET57 / ET55 | 6.24 in | 235/35R19 / 205/55R17 | 5x130 | 71.6 mm | M14 x 1.5 |
| 2.9 · 2.9L, MA 120, F6, Petrol | 8.5x19 | 7x17 | ET55 | 6.42 in | 235/35R19 / 205/55R17 | 5x130 | 71.6 mm | M14 x 1.5 |
| 3.4 S · 3.4L, MA 121, F6, Petrol | 8x18 | 8x18 | ET57 | 6.24 in | 235/40R18 | 5x130 | 71.6 mm | M14 x 1.5 |
| 3.4 S · 3.4L, MA 121, F6, Petrol | 8x19 | 8x18 | ET57 | 6.24 in | 235/35R19 / 235/40R18 | 5x130 | 71.6 mm | M14 x 1.5 |
| 3.4 S · 3.4L, MA 121, F6, Petrol | 8.5x19 | 8x18 | ET55 / ET57 | 6.42 in | 235/35R19 / 235/40R18 | 5x130 | 71.6 mm | M14 x 1.5 |
| 3.4 S · 3.4L, MA 121, F6, Petrol | 8.5x20 | 8x18 | ET50 / ET57 | 6.22 in | 235/30R20 / 235/40R18 | 5x130 | 71.6 mm | M14 x 1.5 |
| 3.4 Spyder · 3.4L, MA 121C, F6, Petrol | 8x18 | 8x18 | ET57 | 6.24 in | 235/40R18 | 5x130 | 71.6 mm | M14 x 1.5 |
| 3.4 Spyder · 3.4L, MA 121C, F6, Petrol | 8x19 | 8x18 | ET57 | 6.24 in | 235/35R19 / 235/40R18 | 5x130 | 71.6 mm | M14 x 1.5 |
| 3.4 Spyder · 3.4L, MA 121C, F6, Petrol | 8.5x19 | 8x18 | ET55 / ET57 | 6.42 in | 235/35R19 / 235/40R18 | 5x130 | 71.6 mm | M14 x 1.5 |
| 3.4 Spyder · 3.4L, MA 121C, F6, Petrol | 8.5x20 | 8x18 | ET50 / ET57 | 6.22 in | 235/30R20 / 235/40R18 | 5x130 | 71.6 mm | M14 x 1.5 |
Compare wheel position See wheel offset
Backspacing values above are calculated from OEM wheel width and offset using BS = width/2 + offset_mm/25.4 (same formula as the fitment calculator).
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More specs for the 2009 Porsche Boxster
Backspacing on these pages is calculated from OEM wheel width and offset (width/2 + offset_mm/25.4). Higher backspacing seats the wheel farther inward; lower backspacing moves it outward.