Mazda 3 2014 - Space Saver Wheel - Mazda3Man

Hello All,

I have the 165 Sport Nav Model 2014, which has 18" wheels as standard. I am currently trying to source a space saver wheel but all I can find is 16" wheels. Is this correct?

Many thanks.

Mazdaman

Mazda 3 2014 - Space Saver Wheel - Oli rag

A member on the mazda 3 forum with a sport nav has his space saver spare size written down as T125/70 D16.

Mazda 3 2014 - Space Saver Wheel - focussed

Usually the section of the official space savers are a higher profile so that the rolling radius is the same as the lower profile standard tyres.

Mazda 3 2014 - Space Saver Wheel - skidpan

The overall diameter of every space saver, temporary spare (call it what you like) we have ever had has been less than the wheel/tyre fitted to the car. This applies to Ford, VW, Kia, Nissan, posibly more.

They are only intended for use in an emergency and should be fitted to the rear and used for a max distance and speed. Its a bit of a faff having to change 2 wheels at the roadside I guess but if put on the front they will probably cause issues with the ESP etc and put a light on the dash.

A call to Mazda should provide you with a clue of the correct size.

Mazda 3 2014 - Space Saver Wheel - daveyjp

Smaller diameter, but greater profile, so rolling radius is equivalent.

The issue of concern is if you put a skinny spare on the front braking can become very erratic.

The imbalance may cause the car to veer dramatically to the side the spare is fitted. Not something you want to find out at the moment you need the brakes.

Mazda 3 2014 - Space Saver Wheel - skidpan

Smaller diameter, but greater profile, so rolling radius is equivalent.

Some may be the same but definitely not with the brands mentioned above. All were smaller on rolling radius, when fitted the car was much lower on that corner.

Mazda 3 2014 - Space Saver Wheel - Mazda3Man

Many thanks for the replies!

Mazda 3 2014 - Space Saver Wheel - skidpan

Had time and carried out a bit of research.

The 18" tyres on a the Mazda 3 Sport should be 225/40 x 18 which has an overall diameter of 637.2mm giving an approx rolling circumference (unloaded) of 2002mm

This appears to be correct since the Mazda 3 when fitted with 17" and 16" wheels has a rolling circumference of 2001mm and 1990mm all of wich are within 0.5% which is negligable and well under the difference you would expect between a new and used tyre which is approx probably about 2%.

If the size quoted above for a 16" sopace saver is correct it has an overall diameter of 581mm which is approx 56mm less than the standard tyre and will lower the car by about an inch on the corner where it is fitted. This is exactly what I have experienced myself when fitting a spacesaver. The unloaded rolling circumference would be approx 1826mm, approx 9% less than the standard tyres.

Mazda 3 2014 - Space Saver Wheel - Engineer Andy

Hello All,

I have the 165 Sport Nav Model 2014, which has 18" wheels as standard. I am currently trying to source a space saver wheel but all I can find is 16" wheels. Is this correct?

Many thanks.

Mazdaman

No doubt you're sourcing one because you were (like me) taken aback at the price Mazda are charging to buy and fit one themselves, around £400. I could buy (and have fitted) 4 new tyres on my Mazda3 (16in tyres) for £100 less in total. Even on 18in it would cost about the same as one Mazda-sourced space saver. Ridiculous!

All because they want to save a few kilos, which, if you fit a space saver wheel & tyre in the underboot area, does not increase your VED grouping (i.e. CO2 emissions band) and probably makes 0.5 mpg difference on the fuel efficiency. I'd rather they (and all car manufacturers) make the space available and fit as standard (unless you say otherwise) a full sized spare.

Good to check out the Mazda3 forum to see if anyone with the mk3 models have been able to source one at a far more reasonable price - the cheapest I read here was still quite pricey at around £300 or so. Many other makes only charge £100 - £150 for such an option.

Mazda 3 2014 - Space Saver Wheel - Avant

"They are only intended for use in an emergency and should be fitted to the rear and used for a max distance and speed. Its a bit of a faff having to change 2 wheels at the roadside I guess but if put on the front they will probably cause issues with the ESP etc and put a light on the dash."

Good advice, although I drove 100 miles with a space-saver on one of my Octavias (on the front - it was cold and dark when I got the puncture!) and I never noticed any difference in handling, nor did any dash lights come on. Possibly because I wasn't going very fast.

 

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