There were quite a few Mazda wheels available for the Roadster; ranging from 16" steel wheels through to 18" alloys. The Roadster wheel fitment is PCD 5 x 114.3 with a centre bore of 67.1mm. The wheel nut size is M12 x 1.5 and the factory specification offset was ET +55, it is possible to fit lower offset wheels for a wider stance. The standard tyre sizes used were 205/50/16, 205/45/17, and 205/40/18. When fitting wheels you should fasten the five wheel nuts in a criss-cross pattern to a torque between 88 and 118Nm. Here I've put together a list of wheels including those used on the various concept models, they were all made by Enkei with the exception of the BBS forged alloy.
Steel Wheels
16 x 6.5
Originally fitted to UK 1.8 models, most were swapped to the Design 110 wheel to help sales. Standard fitment on the JDM NR-A model. Makes a good winter wheel.
Design 110
16 x 6.5
ET +55
Optional alloy, was standard fitment on Icon edition
Design 131
16 x 6.5
ET +55
Standard fitment on NC2 1.8 and 2.0 SE models
Design 111
17 x 7
ET +55
Standard on the NC 2.0 Sport model
BBS RG-H
17 x 7
ET +55
Lightweight Forged Alloy
Standard on Blaze, Prestige, and ZSport models, these are a version of the BBS RG-H design in Mazda fitment - BBS website
Mazdaspeed
17 x 7
ET +55
Optional wheel, features Mazdaspeed logo branding on spokes
Design 132
17 x 7
ET +55
Standard on NC2 2.0 Sport Tech models, this wheel was also used on many special editions such as Sport Black, Kuro, and Venture, where it was painted a different colour
Design 39
17 x 7
ET +55
Optional wheel
Design 58
17 x 7
ET +55
Optional wheel, features MX-5 logo on the rim edge
Design 40
18 x 7
ET +55
Optional wheel, possibly by Fondmetal
Design 40A
18 x 7
ET +55
Optional wheel, possibly by Fondmetal, as seen on the Jota GT concept car
3rd Generation Limited
17 x 7
ET +55
Standard on the 2005 Launch Edition painted a unique silver shade, also made a comeback in 2013 on the Venture and in 2014 on the Sport Venture
Niseko
17 x 7
ET +55
A unique design exclusive to the special edition Niseko model
Motec Nitro
17 x 7
This lightweight wheel by German manufacturer Motec was featured on the Yusho concept car and also used on the Open Race cars
2006 Mazdaspeed Concept - Yokohama AVS Model 5
2007 M'z Tune Concept - Yokohama AVS Model 5
2008 Mazdaspeed Concept - Yokohama Kreutzer Series Xi
2011 Spyder Concept - Yokohama Advan Racing RSII
2011 Super 20 Concept - Enkei RPF1
2012 Super 25 Concept - Rays Engineering Volk Racing TE37
2012 Black Tuned Concept - BBS Individual RI-D
Steel Wheels
16 x 6.5
Originally fitted to UK 1.8 models, most were swapped to the Design 110 wheel to help sales. Standard fitment on the JDM NR-A model. Makes a good winter wheel.
Design 110
16 x 6.5
ET +55
Optional alloy, was standard fitment on Icon edition
Design 131
16 x 6.5
ET +55
Standard fitment on NC2 1.8 and 2.0 SE models
Design 111
17 x 7
ET +55
Standard on the NC 2.0 Sport model
BBS RG-H
17 x 7
ET +55
Lightweight Forged Alloy
Standard on Blaze, Prestige, and ZSport models, these are a version of the BBS RG-H design in Mazda fitment - BBS website
Mazdaspeed
17 x 7
ET +55
Optional wheel, features Mazdaspeed logo branding on spokes
Design 132
17 x 7
ET +55
Standard on NC2 2.0 Sport Tech models, this wheel was also used on many special editions such as Sport Black, Kuro, and Venture, where it was painted a different colour
Design 39
17 x 7
ET +55
Optional wheel
Design 58
17 x 7
ET +55
Optional wheel, features MX-5 logo on the rim edge
Design 40
18 x 7
ET +55
Optional wheel, possibly by Fondmetal
Design 40A
18 x 7
ET +55
Optional wheel, possibly by Fondmetal, as seen on the Jota GT concept car
3rd Generation Limited
17 x 7
ET +55
Standard on the 2005 Launch Edition painted a unique silver shade, also made a comeback in 2013 on the Venture and in 2014 on the Sport Venture
Niseko
17 x 7
ET +55
A unique design exclusive to the special edition Niseko model
Diamond Cut
17 x 7
An optional wheel for the USA marketBlack finish with diamond cut face
Motec Nitro
17 x 7
This lightweight wheel by German manufacturer Motec was featured on the Yusho concept car and also used on the Open Race cars
2006 Mazdaspeed Concept - Yokohama AVS Model 5
2007 M'z Tune Concept - Yokohama AVS Model 5
2008 Mazdaspeed Concept - Yokohama Kreutzer Series Xi
2011 Spyder Concept - Yokohama Advan Racing RSII
2011 Super 20 Concept - Enkei RPF1
2012 Super 25 Concept - Rays Engineering Volk Racing TE37
2012 Black Tuned Concept - BBS Individual RI-D