|Bigger sport rims
Question : I bought a new Toyota Vios 1.5G last year.
I am thinking of replacing the original 15-inch
sport rims with 16-inch sport rims. I prefer to have
imported and lighter 16-inch rims. My car's original tyres are Eagle NCT 5185/55R15.
1. What are the advantages and disadvantages
of bigger sport rims?
2. Any adjustments I need to do to the suspensions and brakes if I change to bigger sport rims?
3. What kind or brand of tyres and 16-inch sport
rims that I should go for?
4. What is the most suitable tyre size for 16-inch
sport rims? I prefer something balanced in terms
of comfort and performance.
5. Are there such categories of tyres, e.g. comfort, comfort-performance, and performance?
1. I would say that if the engine performance of the vehicle has not
changed, I don't see any advantage in changing. Usually the larger diameter
wheels are fitted when there is a substantial improvement in the
engine performance and there is need for more traction. Therefore the larger diameter with ultra low pro-
file wide tyres would give the traction without having
to change any of the gearings.
Larger wheels also mean larger tyres and so there
will be an increase in unsprung weight which may
mean some adjustment to the suspension settings if
the weight difference is substantial. As mentioned,
usually larger diameter wheels will go with wider tyres
and you will need to check clearance of the tyres in your wheel arches and ensure that your new wheels are
with- the same offset as the originals. I say this because
some tyre shops would recommend different offsets in
order to clear the wheel arches but this would result in
some odd handling behaviour on uneven roads and in
2. I have no suggestions on tyres or wheel brands, but
you should look for wheels that are not too heavy.
3. The equivalent 16" tyres for your car would be
195/45R16 or 215/40R16. This will keep you within the
three per cent rule with no need to make any changes to
your speedometer gearing.
4. Remember that when one goes for low profile tyres,
the tyre pressure needs to be increased and there will be
some harshness in the ride which may not be acceptable
to some people. There is not much the tyres can do
except that the degree of harshness will vary sometimes
with the brand of tyre.