I owned a 2008 Suzuki Swift Sport Mk1 for a while but have now sold it. However, I did assemble some useful information on it, which in keeping with the ethos of DataHamster, I am putting here in case it is of any use to anyone.
Wheels and tyres
Standard wheels
The standard OE wheels for the Swift Sport Mk1 are:
5 x 114.3, 6.5 x 17, offset 50, centre bore 60.1mm
After-market wheels
Some sources say that after-market wheels with offset 38-45 are ok, others say 35-40.
If looking for cheap Winter wheels, many cars in Mazda’s line-up (such as the 3, 5, 6, 626 and Premacy) have the correct stud pattern, size and offset, but a 67.1mm bore. However, spigot rings to reduce the bore from 67.1mm to 60.1mm are readily available to buy (eg. on eBay).
Tyres
The standard tyres are 195/45 R17, but these are a little unusual and choices are limited.
You can no longer get the original fit Goodyear Eagle F1 tyres.
205/40 R17 should work fine, according to many internet sources, although I did not try this myself.
Stereo
Please see this post that I made on changing the standard fit stereo for an after-market one.
If you just want an AUX input, then you can get a neat little box of tricks that plugs into the standard fit stereo and makes it think it has the optional CD player fitted.
I still have mine and am happy to sell it. Contact me if interested (I will update this post when it is no longer available, so if you are reading this then assume I still have it!)
Washer motors
Ridiculously easy to change. Please see this post.
‘205/40 R17 should work fine, according to many internet sources, although I did not try this myself.’
It is a good job you didn’t, either. Insurance companies will look for anything not to pay out if the worst occurs. Many, many companies will state the manufactures recommended tyre size, as stipulated in the owner manual, which is 195/45/17.
Trying anything else will put your cover at risk, unless of course one checks with their insurance first.-ut not many at all will agree to a change of tyre size- whatever the genuine physics supporting it- if it isn’t the one stated by the manufacturer (195/45/17).
Why risk it.
That’s a fair point. Although if you were to declare it as a modification then many insurers would accept that (and adjust the premium accordingly, of course). That said, not all insurers allow modifications.
I agree that it would be something you would need to declare to your insurer though.