Author Topic: Wheel and tyre sizes  (Read 12091 times)

Offline penllysbach

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Wheel and tyre sizes
« on: January 09, 2019, 03:21:42 pm »
Afternoon, these may seem really silly questions but I am looking to get winter tyres and possible wheels for my CX5. However, I do not understand why some CX5s have 17" tyres and others 19".
Mine has 19", and here is the really silly question  ... can I put 17" alloys on or must they be 19"?
Thank you

Offline Bert321

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Re: Wheel and tyre sizes
« Reply #1 on: January 09, 2019, 05:19:22 pm »
Both sizes have the same rolling circumference.  The 19" tyres have a smaller sidewall 'height', which gives better handling but worse bump cushioning.
You can fit 17's if you wish, I did this with my previous 2014 Sports Nav.

Offline penllysbach

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Re: Wheel and tyre sizes
« Reply #2 on: January 11, 2019, 09:38:56 am »
Thanks for your help. Am planning on 17" winter tyres.

Offline twabrigs

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Re: Wheel and tyre sizes
« Reply #3 on: January 11, 2019, 02:08:05 pm »
Just to give you more options, you could look at 19" all season tyres, although that's pricey.

Offline Anchorman

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Re: Wheel and tyre sizes
« Reply #4 on: January 12, 2019, 12:48:17 am »
I bought some 17s off eBay.  Hunted round and got some brand new Yokohama W Drives.  They are excellent.  The 19s go back April to November.
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Offline Muceti

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235/55 R19 v 225/55 R19
« Reply #5 on: February 06, 2019, 08:48:23 pm »
I've run a diesel Sport Nav CX-5 Automatic with 19" tyres for nearly 4 years now with nearly 62,000 miles mainly on motorways but I regularly take it off road on forest trails and hill tracks where I appreciate the ground clearance. All the tyres are 225/55 R19 and the front tyres are needing replaced soon.  Is it possible and what difference would it make to the transmission, speedo etc  if I fitted 235/55 R19 all round? There's only something like 11mm difference in diameter and width which would give higher clearance and overall difference of only 1.5%. I know my actual speed would be greater than the speedo but I read my speed from the Sat Nav anyway so that's not going to make any difference.  Basically am I going to knacker the engine and is it safe to fit the slightly larger tyres?

Offline Anchorman

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Re: Wheel and tyre sizes
« Reply #6 on: February 07, 2019, 01:00:06 am »
If you fit all 4 it should be OK as long as they don”t foul widthwise.
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Offline BigAl

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Re: Wheel and tyre sizes
« Reply #7 on: February 07, 2019, 09:26:10 am »
You would also lower the torque and acceleration proportionately; however, I doubt it would be very noticeable?

Mazda CX-5 Forums

Re: Wheel and tyre sizes
« Reply #7 on: February 07, 2019, 09:26:10 am »