2018 BMW M550i xDrive Spare Tire
The BMW M550i xDrive doesn't come equipped with a conventional spare tire. Instead, it utilizes run-flat tires which allow the driver to continue driving for a limited distance at a reduced speed after a puncture or loss of pressure, negating the immediate need of a spare tire. These tires have reinforced sidewalls that support the vehicle's weight during a loss of air pressure. The standard tire size for the M550i xDrive is 245/40R19 front and 275/35R19 rear. It should be noted that the tire size can change based on the model year and optional equipment installed. The use of run-flat tires smoothens the overall driving experience by eliminating the inconvenience of having to instantly replace the tire during driving, and also saving space in the vehicle that would otherwise be occupied by a spare tire. It ' s always important, however, to periodically check the condition of the tires and get them replaced if necessary, to ensure safety and enhanced vehicle performance.
2018 BMW M550i xDrive comes with 2 OEM tire size options. Select the original equipment the tire size installed on your vehicle to see all spare tires that have roughly the same tire diameter and can be used as a temporary replacement in the event of a flat tire. Remember that load carrying capacity of the spare tire must be the same or higher than the load carrying capacity of the original equipment tires in order to safely support the weight of your vehicle. Refer to vehicle owner's manual or contact BMW dealership to confirm the correct 2018 BMW M550i xDrive spare tire size.
245/35R20 (Rear: 275/30R20)
245/35R20 tire has a diameter of 26.8". These temporary spare tires fit the acceptable tire diameter range of 26" to 27.6".
| Spare Size | Spare Diameter | Diameter Differential |
|---|---|---|
| T145/60R20from $271.36 | 26.9" | 0.4% |
| T145/80D18from $257.05 | 27.1" | 1.1% |
| T155/70R18from $178.60 | 26.6" | -0.7% |
| T165/80R17from $166.85 | 27.4" | 2.2% |
| T135/90R17from $158.19 | 26.6" | -0.7% |
| T135/70R19from $147.99 | 26.5" | -1.1% |
| T145/65R20from $146.43 | 27.4" | 2.2% |
| T135/80R18from $125.96 | 26.5" | -1.1% |
| T165/80D17from $124.93 | 27.4" | 2.2% |
| T155/80D17from $97.90 | 26.8" | 0% |
| T155/90D16from $92.99 | 27" | 0.7% |
| T145/90D16from $88.99 | 26.3" | -1.9% |
| T145/80D17from $81.99 | 26.1" | -2.6% |
| T165/70R17 | 26.1" | -2.6% |
| T165/70D18 | 27.1" | 1.1% |
| T165/70D17 | 26.1" | -2.6% |
| T155/90R16 | 27" | 0.7% |
| T155/80R17 | 26.8" | 0% |
| T155/70D18 | 26.6" | -0.7% |
| T145/90R17 | 27.3" | 1.9% |
| T145/90R16 | 26.3" | -1.9% |
| T145/90D17 | 27.3" | 1.9% |
| T145/80R18 | 27.1" | 1.1% |
| T145/80R17 | 26.1" | -2.6% |
| T135/90D17 | 26.6" | -0.7% |
| T135/80D18 | 26.5" | -1.1% |
| T165/70R18 | 27.1" | 1.1% |
245/40R19
245/40R19 tire has a diameter of 26.7". These temporary spare tires fit the acceptable tire diameter range of 25.9" to 27.5".
| Spare Size | Spare Diameter | Diameter Differential |
|---|---|---|
| T145/60R20from $271.36 | 26.9" | 0.7% |
| T145/80D18from $257.05 | 27.1" | 1.5% |
| T155/70R18from $178.60 | 26.6" | -0.4% |
| T165/80R17from $166.85 | 27.4" | 2.6% |
| T135/90R17from $158.19 | 26.6" | -0.4% |
| T135/70R19from $147.99 | 26.5" | -0.7% |
| T145/65R20from $146.43 | 27.4" | 2.6% |
| T135/80R18from $125.96 | 26.5" | -0.7% |
| T165/80D17from $124.93 | 27.4" | 2.6% |
| T145/70D18from $118.97 | 26" | -2.6% |
| T155/80D17from $97.90 | 26.8" | 0.4% |
| T155/90D16from $92.99 | 27" | 1.1% |
| T145/90D16from $88.99 | 26.3" | -1.5% |
| T145/80D17from $81.99 | 26.1" | -2.2% |
| T155/80R17 | 26.8" | 0.4% |
| T155/90R16 | 27" | 1.1% |
| T165/70D17 | 26.1" | -2.2% |
| T165/70D18 | 27.1" | 1.5% |
| T165/70R17 | 26.1" | -2.2% |
| T165/70R18 | 27.1" | 1.5% |
| T185/55D18 | 26" | -2.6% |
| T155/70D18 | 26.6" | -0.4% |
| T145/90R17 | 27.3" | 2.2% |
| T145/90R16 | 26.3" | -1.5% |
| T145/90D17 | 27.3" | 2.2% |
| T145/80R18 | 27.1" | 1.5% |
| T145/80R17 | 26.1" | -2.2% |
| T145/70R18 | 26" | -2.6% |
| T135/90D17 | 26.6" | -0.4% |
| T135/80D18 | 26.5" | -0.7% |
| T185/55R18 | 26" | -2.6% |
More BMW M550i xDrive Spare Tires
All listed guides, data and/or calculations are for informational purposes only. Spare-Tires.com does not warrant or make any representations regarding the accuracy of or the results of the use of this information. Always refer to vehicle owner's manual for the correct spare tire size configuration.