Wheel Fitment

[MRichards]

I'm looking to fit some new wheels to my 2003 Yaris as grip in the wet isn't too good. I'm currently running: 155/80/R13, 5J with an offset of ET39 (they're stock steel wheels).

I'm using http://www.rimsntires.com/specspro.jsp to see how different wheels will fit. Ideally looking for 14's, maybe 15's. 

I'm just wondering, compared to my stock wheels, how much closer can the wheels be to suspension/brake components and how much more can they stick out from the wheelarches?

Here's a link on that website where chart 1 is the OEM wheel that I'm currently using.

Thanks! :)

[vnahalv]

What tyres are you running on the stock wheels?

If you are looking for more grip in the wet I'd suggest getting a good set of tyres and not new wheels!

 

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[FROSTYBALLS]

Two things you need to consider:

1) when you have decided on wheel/tyre size, check with your insurer as to whether they will consider the change to be a modification - which may incur an extra premium.

2) use a tyre size calculator to determine the effect on the speedometer - eg. http://www.troyautopoint.co.uk/information/tyre-size-calculator?view=default

See: In the UK, the speedometer must never show an indicated speed less than the actual speed.

For all actual speeds between 25 mph and 70 mph (or the vehicles' maximum speed if it is lower than this), the indicated speed must not exceed 110% of the actual speed, plus 6.25 mph. For example, if the vehicle is actually travelling at 50 mph, the speedometer must not show more than 61.25 mph or less than 50 mph.

[Anthony Poli]

I would also recommend choosing better tyres than bigger wheels. As mentioned lots of time on here about the risk of speedometer error and risk the bigger wheels getting too close to other parts of the car.

 

One tyre I can recommend, if still available is the uniroyal rain expert. I could drive through puddles without any feeling of losing grip, even on bends.

 

 

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[MRichards]

3 hours ago, Anthony Poli said:

I would also recommend choosing better tyres than bigger wheels. As mentioned lots of time on here about the risk of speedometer error and risk the bigger wheels getting too close to other parts of the car.

 

One tyre I can recommend, if still available is the uniroyal rain expert. I could drive through puddles without any feeling of losing grip, even on bends.

 

 

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I'm aware of the error that can occur in the speedo, the wheels I've looked at are only out by 0.5 mph, or some are exactly the same (bigger rim diameter meaning lower profile tyres are needed to keep the overall diameter the same). What size wheels are you running with the RainExperts? 

 

I'm running ditch-finders currently so obviously good branded tyres on the 13's will make the grip better but more width when putting the car into a corner will help? I'd just like to know how much room I have to play with so I don't hit suspension, driveshafts etc. and the wheels don't come out the arches :)

[Anthony Poli]

I had them on a corolla 155/45/r14

 

 

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