2005 Mazda Roadster tire and wheel sizes, bolt pattern and tire pressure

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

Tires for the 2005 Mazda Roadster

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

185/60R14 Best-rated standard on 2 trims

Check price on Amazon · 185/60R14
205/45R16 Best-rated standard on 1 trim · optional on 1

Check price on Amazon · 205/45R16
205/50R16 Best-rated standard on 1 trim

Check price on Amazon · 205/50R16

Also listed: 205/40R18 + 225/35R18 195/50R15 205/45R17 195/45R16 205/40R17 215/35R17 215/45R17 215/35R18

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Trims sold in 2005: 5
Generations: III (NC)II (NB)
Other years: 2001
2002
2003
2004
2005
2006
2007
2008
All years (1989–2026)

5 trims sold in 2005

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

Mazda Roadster III (NC)

2005–2015 2 trims

Roadster 2.0i (CBA-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 (CBA-NCEC) 168 hp · I4 205/50R16 87V 3 fitments

Generation: NC · 2005–2015
Power: 168 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 83W	Rim 18x7 ET50 ~~5x114.3~~	30 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.

Mazda Roadster II (NB)

1998–2005 3 trims

Roadster 1.6i (GF-NB6C) 123 hp · I4 185/60R14 82H 3 fitments

Generation: NB · 1998–2005
Power: 123 hp
Engine: I4, Petrol
Center bore: 54.1 mm
Bolt pattern: 4x100
Thread: M12 x 1.5

Check price on Amazon · 185/60R14 Wheels 14x6 ET40 · 4x100 · 54.1 mm on Amazon

Tire size	Rim size and bolt pattern	Pressure, psi
185/60R14 82H	Rim 14x6 ET40 ~~4x100~~	26 psi
195/50R15 82V	Rim 15x6 ET40 ~~4x100~~	26 psi
195/45R16 82V	Rim 16x6 ET40 ~~4x100~~	29 psi

How to read 82H: 82 is the load index (up to 1,047 lb / 475 kg per tire) and H the speed rating (up to 130 mph / 210 km/h). ET40 is the wheel offset: how far the mounting face sits from the rim centre, in millimetres.

Roadster 1.8i (GF-NB8C) 143 hp · I4 185/60R14 82H 3 fitments

Generation: NB · 1998–2005
Power: 143 hp
Engine: I4, Petrol
Center bore: 54.1 mm
Bolt pattern: 4x100
Thread: M12 x 1.5

Check price on Amazon · 185/60R14 Wheels 14x6 ET40 · 4x100 · 54.1 mm on Amazon

Tire size	Rim size and bolt pattern	Pressure, psi
185/60R14 82H	Rim 14x6 ET40 ~~4x100~~	26 psi
195/50R15 82V	Rim 15x6 ET40 ~~4x100~~	26 psi
205/45R16 83V	Rim 16x6.5 ET40 ~~4x100~~	29 psi

Roadster 1.8i RS (GF-NB8C) 158 hp · I4 205/45R16 83W 3 fitments

Generation: NB · 1998–2005
Power: 158 hp
Engine: I4, Petrol
Center bore: 54.1 mm
Bolt pattern: 4x100
Thread: M12 x 1.5

Check price on Amazon · 205/45R16 Wheels 16x6.5 ET40 · 4x100 · 54.1 mm on Amazon

Tire size	Rim size and bolt pattern	Pressure, psi
205/45R16 83W	Rim 16x6.5 ET40 ~~4x100~~	29 psi
205/40R17 82W	Rim 17x7 ET42 ~~4x100~~	29 psi
215/35R17 84W	Rim 17x7 ET38 ~~4x100~~	30 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). ET40 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.