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JAPSHOP (SPD AUTOMOTIVE LTD) UNIT 2 & 7 ENTERPRISE COURT, LANCASHIRE BUSINESS PARK, LEYLAND, LANCASHIRE, UNITED KINGDOM, PR26 6TZ, United Kingdom.

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4 STUD MX 5 WHEELS - Year 1988-2004

MX5 OFFSET EXPLAINED

MX5 OFFSET EXPLAINED

What do wheel offset numbers mean?

Offset is expressed as an ET number, (ie is ET38) and the ‘ET’ is a shortened version of the German word ‘Einpresstiefe’ which means ‘insertion depth.’ The number is the distance in millimetres between the centre line and the mounting surface.
It sounds confusing but the important thing to remember is wheels with a higher offset will sit UNDER the wheel arch more than a lower offset which will POKE OUT towards the wheel are more.

Study the image above, same wheel width,same tyre size, different offset, notice the colour green and yellow.

Positive Offset

A positive offset occurs when the hub mounting surface is on the street side (the side you see) of the center line of the rim. Most factory rims will have this type of offset.


Zero Offset

When the hub mounting surface is centered within the rim, it is known as a zero offset.


Negative Offset

If the hub mounting surface is on the brake side of the center line of the rim, it is considered a negative offset or “deep dish”.
MX 5 wheels - 4 Stud Cars - 1988 - 2004

MX 5 wheels - 4 Stud Cars - 1988 - 2004

This is a selection of MX5 wheels we like and our customers buy most, we have many more wheels in our wheel section but these are the wheels we feel are best.


The MX5 wheels we select are wider than standard, please check the wheels on your car before fitting tyres.
The wheels listed below are fairly conservative, further down this list are more extreme MX5 wheels

Data checked on - http://www.willtheyfit.com/

Original 14" x 5.5" ET45 (MK1 Miata & Eunos)
Original 15" x 6.0" ET45 (MK1 Miata & Eunos)

So therefore we have some calculations for you..

Buddy club 15 x 6.5 ET42 vs 14 x 5.5 ET45 = 9.7mm closer to the suspension strut.The outer rim will poke out 15.7mm more than before.
Buddy club 15 x 6.5 ET42 vs 14 x 6.0 ET45 = 3.4mm closer to the suspension strut. The outer rim will poke out 9.4mm more than before.



The 3 wheels listed below suitable for MX5

BUDDY CLUB SF 15 X 6.5 - ET42 - 100 X 4 - BLACK+RED / BC-SF1565-1BR

BUDDY CLUB SF 15 X 6.5 - ET42 - 100 X 4 - BLACK+RED / BC-SF1565-1BR

Price: 97.00 (116.40 Including VAT at 20%)

BUDDY CLUB SF 15 X 6.5 - ET42 - 100 X 4 - GLOSS WHITE / BC-SF1565-1WT

BUDDY CLUB SF 15 X 6.5 - ET42 - 100 X 4 - GLOSS WHITE / BC-SF1565-1WT

Price: 97.00 (116.40 Including VAT at 20%)

MX5 Wheels - 15 x 7 - 4 Stud Cars - 1988 - 2004

MX5 Wheels - 15 x 7 - 4 Stud Cars - 1988 - 2004

Now we are getting a little wider but still easily inside the wheel arch - see calculations

Buddy club 15 x 7.0 ET40 vs 14 x 5.5 ET45 = 14.1mm closer to the suspension strut. The outer rim will poke out 24.1mm more than before.
Buddy club 15 x 7.0 ET40 vs 14 x 6.0 ET45 = 7.7mm closer to the suspension strut. The outer rim will poke out 17.7mm more than before.

Buddy club 15 x 7.0 ET35 vs 14 x 5.5 ET45 = 9.1mm closer to the suspension strut. The outer rim will poke out 29.1mm more than before.
Buddy club 15 x 7.0 ET35 vs 14 x 6.0 ET45 = 2.7mm closer to the suspension strut. The outer rim will poke out 22.7mm more than before.


7 Wheel listed below suitable for MX5

BUDDY CLUB SF 15 X 7 - ET40 - 100 X 4 - BLK+RED / BC-SF1570-1BR

BUDDY CLUB SF 15 X 7 - ET40 - 100 X 4 - BLK+RED / BC-SF1570-1BR

Price: 104.00 (124.80 Including VAT at 20%)

BUDDY CLUB  F91 15 X 7 - ET40 - 100 X 4 - BRONZE BLACK / BC-F911570-2BZB

BUDDY CLUB F91 15 X 7 - ET40 - 100 X 4 - BRONZE BLACK / BC-F911570-2BZB

Price: 100.62 (120.74 Including VAT at 20%)

BUDDY CLUB  F91 15 X 7 - ET40 - 100 X 4 - WHITE / BC-F911570-2WT

BUDDY CLUB F91 15 X 7 - ET40 - 100 X 4 - WHITE / BC-F911570-2WT

Price: 100.62 (120.74 Including VAT at 20%)

BUDDY CLUB  F91 15 X 7 - ET35 - 100 X 4 - WHITE / BC-F911570-1WT

BUDDY CLUB F91 15 X 7 - ET35 - 100 X 4 - WHITE / BC-F911570-1WT

Price: 100.62 (120.74 Including VAT at 20%)

MX5 - 15 x 8 - 4 Stud Cars - 1988 - 2004

MX5 - 15 x 8 - 4 Stud Cars - 1988 - 2004

Buddy club 15 x 8.0 ET35 vs 14 x 5.5 ET45 = 18.8mm closer to the suspension strut. The outer rim will poke out 44.8mm more than before
Buddy club 15 x 8.0 ET35 vs 14 x 6.0 ET45 = 12.4mm closer to the suspension strut. The outer rim will poke out 38.4mm more than before.
MX5 Wheels - 16 x 7 - 4 Stud Cars - 1988 - 2004

MX5 Wheels - 16 x 7 - 4 Stud Cars - 1988 - 2004

Buddy club 16 x 7.0 ET42 vs 14 x 5.5 ET45 = 16.1mm closer to the suspension strut. The outer rim will poke out 22.1mm more than before.
Buddy club 16 x 7.0 ET42 vs 14 x 6.0 ET45 = 9.7mm closer to the suspension strut. The outer rim will poke out 15.7mm more than before.

BC-SF1670-1BK / BUDDY CLUB SF 16 X 7 - ET42 - 100 X 4 - MATT BLACK

BC-SF1670-1BK / BUDDY CLUB SF 16 X 7 - ET42 - 100 X 4 - MATT BLACK

Price: 134.00 (160.80 Including VAT at 20%)

BUDDY CLUB SF 16 X 7 - ET42 - 100 X 4 - MATT BLACK RED PINLINE / BC-SF1670-1BR

BUDDY CLUB SF 16 X 7 - ET42 - 100 X 4 - MATT BLACK RED PINLINE / BC-SF1670-1BR

Price: 134.00 (160.80 Including VAT at 20%)

BUDDY CLUB SF 16 X 7 - ET42 - 100 X 4 - MATT BLACK YELLOW PINLINE / BC-SF1670-1BY

BUDDY CLUB SF 16 X 7 - ET42 - 100 X 4 - MATT BLACK YELLOW PINLINE / BC-SF1670-1BY

Price: 97.87 (117.44 Including VAT at 20%)

BUDDY CLUB SF 16 X 7 - ET42 - 100 X 4 - GUN GREY METALLIC / BC-SF1670-1GM

BUDDY CLUB SF 16 X 7 - ET42 - 100 X 4 - GUN GREY METALLIC / BC-SF1670-1GM

Price: 134.00 (160.80 Including VAT at 20%)

BUDDY CLUB SF 16 X 7 - ET42 - 100 X 4 - GLOSS WHITE RED PINLINE / BC-SF1670-1WR

BUDDY CLUB SF 16 X 7 - ET42 - 100 X 4 - GLOSS WHITE RED PINLINE / BC-SF1670-1WR

Price: 120.00 (144.00 Including VAT at 20%)

BC-SF1670-1WT / BUDDY CLUB SF 16 X 7 - ET42 - 100 X 4 - GLOSS WHITE

BC-SF1670-1WT / BUDDY CLUB SF 16 X 7 - ET42 - 100 X 4 - GLOSS WHITE

Price: 134.00 (160.80 Including VAT at 20%)

MX5 EXTREME FITTINGS  - 4 X 100 PCD - 1988-2004

MX5 EXTREME FITTINGS - 4 X 100 PCD - 1988-2004

15 x 8 With Lower Offset
Now we are getting serious! Greater considerations and care when fitting wider wheels to MX5, we work with some of Europe's most knowledgeable MX5 tuners and so can offer the advice. Please email us if you have any concerns and do not buy these wheels unless you are 100% competent and are quite prepared to modify your car in order to get the wheels to fit.

We will start with 8" going up to 9" Highest offset (ET) means less extreme, more inwards towards the shock absorber.

You will need to drop a plumb line from the top of your wheel arches and measure the distance from the rim to the line, this will tell you the measurement you are able to compare.

STANDARD MX5 - 1.8i Sport 2001 LETS COMPARE..

Standard 16" x 6.5" ET45 VS Some of our extreme fittings in order of width then offset..

15 x 7 ET 25 = 13.7mm further away from the suspension strut. The outer rim will poke out 26.4mm more than before.

15 x 8 ET 20 = 18.7mm further away from the suspension strut. The outer rim will poke out 31.4mm more than before.

15 x 8.25 ET20 = 2.8mm further away from the suspension strut. The outer rim will poke out 47.2mm more than before.

15 x 8 ET 15 = 11mm further away from the suspension strut. The outer rim will poke out 49.1mm more than before.

15 x 8 ET 10 = 16mm further away from the suspension strut. The outer rim will poke out 54.1mm more than before.

15 x 8 ET 0 = 26mm further away from the suspension strut. The outer rim will poke out 64.1mm more than before.

15 x 8.25 ET0 = 22.8mm further away from the suspension strut. The outer rim will poke out 67.2mm more than before.

15 x 9 ET25 = 11.8mm closer to the suspension strut. The outer rim will poke out 51.8mm more than before.

15 x 9 ET20 = 6.8mm closer to the suspension strut. The outer rim will poke out 56.8mm more than before.

15 x 9 ET15 = 1.8mm closer to the suspension strut. The outer rim will poke out 61.8mm more than before.

15 x 9 ET10 = 3.3mm further away from the suspension strut. The outer rim will poke out 66.8mm more than before.

15 x 9 ET0 = 13.3mm further away from the suspension strut. The outer rim will poke out 76.8mm more than before.

You will find a massive range of wheels in our ULTRALITE and XXR section of the wheels area of this website.

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