2015 Mazda Roadster tire and wheel sizes, bolt pattern and tire pressure

Bolt patterns 4x100 or 5x114.3, depending on the market version.

Tires for the 2015 Mazda Roadster

Sizes most trims come with first. Open your trim below for its exact size.

195/50R16 Best-rated standard on 1 trim

Check price on Amazon · 195/50R16
205/50R16 Best-rated standard on 1 trim

Check price on Amazon · 205/50R16
205/40R18 front + 225/35R18 rear Best-rated standard on 1 trim

Check price on Amazon · 205/40R18 front Check price on Amazon · 225/35R18 rear

Also listed: 205/45R17 215/35R18 215/45R17

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Trims sold in 2015: 3
Generations: IV (ND)III (NC)
Other years: 2011
2012
2013
2014
2015
2016
2017
2018
All years (1989–2026)

3 trims sold in 2015

Open a trim for its tire and rim sizes, bolt pattern and tire pressure.

Mazda Roadster IV (ND)

2015–2023 1 trim

Roadster 1.5i (DBA-ND5RC) 129 hp · 1.5L P5-VPR I4 195/50R16 84V 4 fitments

Generation: ND · 2015–2023
Power: 129 hp
Engine: 1.5L P5-VPR I4, Petrol
Center bore: 54.1 mm
Bolt pattern: 4x100
Thread: M12 x 1.5

Check price on Amazon · 195/50R16 Wheels 16x6.5 ET45 · 4x100 · 54.1 mm on Amazon

Tire size	Rim size and bolt pattern	Pressure, psi
195/50R16 84V	Rim 16x6.5 ET45 ~~4x100~~	29 psi
195/50R16 84V	Rim 16x7 ET45 ~~4x100~~	29 psi
205/45R17 84W	Rim 17x7 ET45 ~~4x100~~	29 psi
215/35R18 84W	Rim 18x7 ET45 ~~4x100~~	30 psi

How to read 84V: 84 is the load index (up to 1,102 lb / 500 kg per tire) and V the speed rating (up to 149 mph / 240 km/h). ET45 is the wheel offset: how far the mounting face sits from the rim centre, in millimetres.

Mazda Roadster III (NC)

2005–2015 2 trims

Roadster 2.0i (DBA-NCEC) 168 hp · 2.0L I4 205/40R18 83W / 225/35R18 85W 3 fitments

Generation: NC · 2005–2015
Power: 168 hp
Engine: 2.0L I4, Petrol
Center bore: 67.1 mm
Bolt pattern: 5x114.3
Thread: M12 x 1.5

Check price on Amazon · 205/40R18 Check price on Amazon · 225/35R18 Wheels 18x7 ET50 · 5x114.3 · 67.1 mm on Amazon

Tire size	Rim size and bolt pattern	Pressure, psi
Front205/40R18 83W	Rim 18x7 ET50 ~~5x114.3~~	29 psi
Rear225/35R18 85W	Rim 18x8 ET50 ~~5x114.3~~	32 psi
205/45R17 84W	Rim 17x7 ET55 ~~5x114.3~~	29 psi
215/45R17 87W	Rim 17x7 ET50 ~~5x114.3~~	29 psi

How to read 83W: 83 is the load index (up to 1,074 lb / 487 kg per tire) and W the speed rating (up to 168 mph / 270 km/h). ET50 is the wheel offset: how far the mounting face sits from the rim centre, in millimetres.

Roadster 2.0i (DBA-NCEC) 160 hp · I4 205/50R16 87V 3 fitments

Generation: NC · 2005–2015
Power: 160 hp
Engine: I4, Petrol
Center bore: 67.1 mm
Bolt pattern: 5x114.3
Thread: M12 x 1.5

Check price on Amazon · 205/50R16 Wheels 16x6.5 ET55 · 5x114.3 · 67.1 mm on Amazon

Tire size	Rim size and bolt pattern	Pressure, psi
205/50R16 87V	Rim 16x6.5 ET55 ~~5x114.3~~	29 psi
205/45R17 84W	Rim 17x7 ET55 ~~5x114.3~~	29 psi
215/35R18 84W	Rim 18x7 ET50 ~~5x114.3~~	29 psi

How to read 87V: 87 is the load index (up to 1,202 lb / 545 kg per tire) and V the speed rating (up to 149 mph / 240 km/h). ET55 is the wheel offset: how far the mounting face sits from the rim centre, in millimetres.

What these columns mean

Rim size: Rim diameter × width in inches, and the factory offset (ET) in millimetres, e.g. 18x7.5 ET25.
Bolt pattern (PCD): Number of studs and the diameter of the circle they sit on. It must match exactly.
Center bore: Diameter of the hub hole. Larger aftermarket bores need hub-centric rings.
Pressure: Recommended cold inflation pressure for that axle, in psi.
Staggered: A wider tire on the rear axle than the front. Front-to-back rotation is not possible.
Thread size: Lug bolt or nut thread — needed when buying aftermarket fasteners.