The drive train and wheels is very much open for discussion. Below are some information to help you decide what is right for your application. This information has been compiled from posts by members on the forum.

Finding the right set of mags that will fit is the biggest problem. The standard wheels are, well, you know, plain boring and small (12X4.5 inch rims).

Most people go for a after market rim. There are plenty of mags fitted to other Japanese cars made around the mid to late eightys.You just have to make sure that you find a set with a 114.3mm stud pattern. Another problem is that the Mightyboy has a 10mm stud diameter with is different to the usual 12mm stud found even on most other Suzuki's. You might be able to find some 10mm bolts at a tyre garage or you might need to get some made up at a metal works shop. (Which will not be cheap)

Some mags will fit using the standard 10mm nuts you already have - like some types of Laser mags (13X5") and others don't. Some people on the forum said they have got 10mm nuts from Supercheap, but I think they have had to order them in. The difference between the standard 10mm nut and the ordered one is the new ones are longer. You can only go to a width of 5.5 inches on your new mags. This is law in most states (1" wider than standard).

To reduce fouling (rubbing from the wheel onto any part of the body) when cornering and over bumps people do a variety of things.

Firstly you can fit lower profile skinnier tyres. The way tyres work is their size is printed on the wall of the tyre. It should look something like this: 145/70 R12

The 145 describes the width of the tyre in millimeters.
The 70 describes the height of the side wall, or in other words how 'low profile they are' in a percentage of the width: 70% of 145mm = 101.5mm
The R12 describes the rim diameter in inches: 12 inch rim.

The problem with changing your tyre spec's is that you can inadvertently change the reading on your speedo. For example, 165/70 R12 Bridgestones look great on 12 inch rims but they will have your speedo reading 60km/h when you will actually be doing 68km/h. This is also bad because you will think everyone is 8km/h below the speed limit - and it will drive you nuts!

On 12" mags, 165/70 R12's don't rub or foul. 145/70 R12's look small, but give a better take off speed.

Here is a 12x5 mag (Cheviot) with a strange off-set and tyre (145 R12 72T M/S) combo. This rim gives a slightly wider tract because it is set out about 1 inch - see the photo.

Notice how far the tyre sticks out past the guard. This particular car scrubs on large bumps but not on turning. Also helps if the tyre is fully inflated. An improperly inflated tyre reduces performance not only in speed, but also in stability. It also reduces the life of your tyre!

Here are some shots of other 12 inch rims with 165/70 R12's on them.

Wider and larger tyres improves handling, but on a 550cc, it will just make the car that little more gutless.

Most people go for 13x5 or 13x5.5 mags. People have found 165/55 R13 or 175/50 R13's are best as they maintain the original radii. Yokohama's come in a 175/50 R13.;

To work out all the dimensions and rolling radii for your new tyre as apposed to the original, go to this great site: http://www.miata.net/garage/tirecalc.html (Thanks Truder44)

Another option to fit larger mags is to flare to guards. This usually involves lots of cutting and welding like below. The end result looks great.

14&15" rims can be fitted. Skinny low profile tyres MUST be fitted but on the front it will rub when on full lock. Tubing (cutting clearances) the inside of the wheel arch would have to be done too. Some members have had to cut off the rear bump stops and roll the lips of their guards. (Rolling the guards is the process of placing a tube up under the guard and levering ever so slightly backwards and forwards in a rolling manner over the tyre. If done wrong it can crack your paint and / or dent your guard.)

Depending how deep your pockets are, and with a fair bit of modification you could throw plenty of clams at getting 15X5.5" mags to fit.
The local tyre guy had a chat to evilgitget and told him not to waste his time with 14" rims and that he could supply a nice looking set of 15X5.5" with 30 profile tyres for less than the cost of the 14" tyres. This size tyre / rim combo could be illegal in some states though. This guy was from a Tyrepower store, and what he has said has not been proven to work and members are highly skeptical on the existence of a 30 profile 15" tyre.

To get a wider track bolt on spacers are available from Japan:

These could be illegal in your state, but should help cornering if this is the desired outcome. These spacers can also convert your 10mm studs into the standard 12mm studs.

This write-up is by no means complete, and we would love your contributions. Any inaccuracies or other methods would greatly be appreciated for inclusion (with photos please). Email all adjustments and photos to the club here.

No responsibility is taken with ANY of the information contained within this entire site. Use at your own risk.