Question 1

What is the diameter of a 245/50 R17 tire?

Accepted Answer

A 245/50 R17 tire has a nominal overall diameter of 677 mm (26.6 inches), a sidewall height of 123 mm and a rolling circumference of 2126 mm. These are nominal figures calculated from the size marking; actual dimensions vary by manufacturer, load and wear.

Question 2

What do the numbers in 245/50 R17 mean?

Accepted Answer

245 is the nominal section width in millimetres. 50 is the sidewall height expressed as a percentage of that width, giving a 123 mm sidewall. R denotes radial construction, and 17 is the wheel bead-seat diameter in inches — which is not the overall tire diameter.

Question 3

Which vehicles use 245/50 R17 tires?

Accepted Answer

The catalogue records this size on 27 vehicle configurations, including 2012 Acura RL 3.7 Petrol Automatic 6-speed AWD, 2011 Acura RL 3.7 Petrol Automatic 6-speed AWD, 2010 Acura RL 3.7 Petrol Automatic 5-speed AWD, 2010 BMW 6 Series 4.8 Petrol Automatic 6-speed RWD, 2010 BMW 6 Series 4.8 Petrol Manual 6-speed RWD. Always confirm the size against the vehicle placard before fitting.

Nominal section width	245 mm
Sidewall-to-width ratio	50%
Sidewall height	123 mm
Construction	R — radial
Wheel bead-seat diameter	17 inches
Overall diameter	677 mm (26.6 in)
Rolling circumference	2126 mm

245/50 R17 tire dimensions

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What 245/50 R17 means

Vehicles with 245/50 R17 tires