2021 BMW Z4 Wheel Backspacing
5.76 in · 5.43 in · 4.69 in · 4.79 in
Quick specs
- Backspacing
- 5.76 in · 5.43 in · 4.69 in · 4.79 in
- OEM offset
- ET32 · ET30 · ET24 · ET20
- Wheel size
- 9x18 · 8.5x18 · 9x19 · 7.5x17 · 8x18
- Bolt pattern
- 5×112
- Tire size
- 255/40R18 · 255/35R19 · 225/50R17 · 225/45R18
OEM configurations
| Configuration | Front | Rear | Offset | Backspacing | Tire | Bolt pattern | Center bore | Thread |
|---|---|---|---|---|---|---|---|---|
| M40i · 3.0L, B58B30B, I6, Petrol | 9x18 | 9x18 | ET32 | 5.76 in | 255/40R18 | 5x112 | 66.6 mm | M14 x 1.25 |
| M40i · 3.0L, B58B30B, I6, Petrol | 8.5x18 | 9x18 | ET30 / ET32 | 5.43 in | 255/40R18 | 5x112 | 66.6 mm | M14 x 1.25 |
| M40i · 3.0L, B58B30B, I6, Petrol | 9x19 | 9x18 | ET32 | 5.76 in | 255/35R19 / 255/40R18 | 5x112 | 66.6 mm | M14 x 1.25 |
| sDrive30i · 2.0L, B48B20, I4, Petrol | 7.5x17 | 7.5x17 | ET24 | 4.69 in | 225/50R17 | 5x112 | 66.6 mm | M14 x 1.25 |
| sDrive30i · 2.0L, B48B20, I4, Petrol | 8x18 | 7.5x17 | ET20 / ET24 | 4.79 in | 225/45R18 / 225/50R17 | 5x112 | 66.6 mm | M14 x 1.25 |
| sDrive30i · 2.0L, B48B20, I4, Petrol | 8.5x18 | 7.5x17 | ET30 / ET24 | 5.43 in | 255/40R18 / 225/50R17 | 5x112 | 66.6 mm | M14 x 1.25 |
| sDrive30i · 2.0L, B48B20, I4, Petrol | 9x18 | 7.5x17 | ET32 / ET24 | 5.76 in | 255/40R18 / 225/50R17 | 5x112 | 66.6 mm | M14 x 1.25 |
| sDrive30i · 2.0L, B48B20, I4, Petrol | 9x19 | 7.5x17 | ET32 / ET24 | 5.76 in | 255/35R19 / 225/50R17 | 5x112 | 66.6 mm | M14 x 1.25 |
| sDrive30i · 2.0L, B48B20, I4, Petrol | 7.5x17 | 7.5x17 | ET24 | 4.69 in | 225/50R17 | 5x112 | 66.6 mm | M14 x 1.25 |
| sDrive30i · 2.0L, B48B20, I4, Petrol | 9x19 | 7.5x17 | ET32 / ET24 | 5.76 in | 255/35R19 / 225/50R17 | 5x112 | 66.6 mm | M14 x 1.25 |
| sDrive30i · 2.0L, B48B20, I4, Petrol | 8x18 | 7.5x17 | ET20 / ET24 | 4.79 in | 225/45R18 / 225/50R17 | 5x112 | 66.6 mm | M14 x 1.25 |
| sDrive30i · 2.0L, B48B20, I4, Petrol | 8.5x18 | 7.5x17 | ET30 / ET24 | 5.43 in | 255/40R18 / 225/50R17 | 5x112 | 66.6 mm | M14 x 1.25 |
| sDrive30i · 2.0L, B48B20, I4, Petrol | 9x18 | 7.5x17 | ET32 / ET24 | 5.76 in | 255/40R18 / 225/50R17 | 5x112 | 66.6 mm | M14 x 1.25 |
| M40i · 3.0L, B58B30C, I6, Petrol | 9x18 | 9x18 | ET32 | 5.76 in | 255/40R18 | 5x112 | 66.6 mm | M14 x 1.25 |
| M40i · 3.0L, B58B30C, I6, Petrol | 8.5x18 | 9x18 | ET30 / ET32 | 5.43 in | 255/40R18 | 5x112 | 66.6 mm | M14 x 1.25 |
| M40i · 3.0L, B58B30C, I6, Petrol | 9x19 | 9x18 | ET32 | 5.76 in | 255/35R19 / 255/40R18 | 5x112 | 66.6 mm | M14 x 1.25 |
| sDrive20i · 2.0L, B48B20, I4, Petrol | 7.5x17 | 7.5x17 | ET24 | 4.69 in | 225/50R17 | 5x112 | 66.6 mm | M14 x 1.25 |
| sDrive20i · 2.0L, B48B20, I4, Petrol | 8x18 | 7.5x17 | ET20 / ET24 | 4.79 in | 225/45R18 / 225/50R17 | 5x112 | 66.6 mm | M14 x 1.25 |
| sDrive20i · 2.0L, B48B20, I4, Petrol | 8.5x18 | 7.5x17 | ET30 / ET24 | 5.43 in | 255/40R18 / 225/50R17 | 5x112 | 66.6 mm | M14 x 1.25 |
| sDrive20i · 2.0L, B48B20, I4, Petrol | 9x18 | 7.5x17 | ET32 / ET24 | 5.76 in | 255/40R18 / 225/50R17 | 5x112 | 66.6 mm | M14 x 1.25 |
| sDrive20i · 2.0L, B48B20, I4, Petrol | 9x19 | 7.5x17 | ET32 / ET24 | 5.76 in | 255/35R19 / 225/50R17 | 5x112 | 66.6 mm | M14 x 1.25 |
| M40i (3BA-HF30T) · 3.0L, B58B30B, I6, Petrol | 9x19 | 9x19 | ET32 | 5.76 in | 255/35R19 | 5x112 | 66.6 mm | M14 x 1.25 |
| M40i (3BA-HF30T) · 3.0L, B58B30B, I6, Petrol | 8.5x18 | 9x19 | ET30 / ET32 | 5.43 in | 255/40R18 / 255/35R19 | 5x112 | 66.6 mm | M14 x 1.25 |
| M40i (3BA-HF30T) · 3.0L, B58B30B, I6, Petrol | 9x18 | 9x19 | ET32 | 5.76 in | 255/40R18 / 255/35R19 | 5x112 | 66.6 mm | M14 x 1.25 |
| sDrive20i (3BA-HF20) · 2.0L, B48B20B, I4, Petrol | 7.5x17 | 7.5x17 | ET24 | 4.69 in | 225/50R17 | 5x112 | 66.6 mm | M14 x 1.25 |
| sDrive20i (3BA-HF20) · 2.0L, B48B20B, I4, Petrol | 8x18 | 7.5x17 | ET20 / ET24 | 4.79 in | 225/45R18 / 225/50R17 | 5x112 | 66.6 mm | M14 x 1.25 |
| sDrive20i (3BA-HF20) · 2.0L, B48B20B, I4, Petrol | 8.5x18 | 7.5x17 | ET30 / ET24 | 5.43 in | 255/40R18 / 225/50R17 | 5x112 | 66.6 mm | M14 x 1.25 |
| sDrive20i (3BA-HF20) · 2.0L, B48B20B, I4, Petrol | 9x18 | 7.5x17 | ET32 / ET24 | 5.76 in | 255/40R18 / 225/50R17 | 5x112 | 66.6 mm | M14 x 1.25 |
| sDrive20i (3BA-HF20) · 2.0L, B48B20B, I4, Petrol | 9x19 | 7.5x17 | ET32 / ET24 | 5.76 in | 255/35R19 / 225/50R17 | 5x112 | 66.6 mm | M14 x 1.25 |
| sDrive25i · 2.0L, B48B20B, I4, Petrol | 9x19 | 9x19 | ET32 | 5.76 in | 255/35R19 | 5x112 | 66.6 mm | M14 x 1.25 |
| sDrive25i · 2.0L, B48B20B, I4, Petrol | 7.5x17 | 9x19 | ET24 / ET32 | 4.69 in | 225/50R17 / 255/35R19 | 5x112 | 66.6 mm | M14 x 1.25 |
| sDrive25i · 2.0L, B48B20B, I4, Petrol | 8x18 | 9x19 | ET20 / ET32 | 4.79 in | 225/45R18 / 255/35R19 | 5x112 | 66.6 mm | M14 x 1.25 |
| sDrive25i · 2.0L, B48B20B, I4, Petrol | 8.5x18 | 9x19 | ET30 / ET32 | 5.43 in | 255/40R18 / 255/35R19 | 5x112 | 66.6 mm | M14 x 1.25 |
| sDrive25i · 2.0L, B48B20B, I4, Petrol | 9x18 | 9x19 | ET32 | 5.76 in | 255/40R18 / 255/35R19 | 5x112 | 66.6 mm | M14 x 1.25 |
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 2021 BMW Z4
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.