tryes ?

[clembo38]

hi all

just need the above answered please,am due to put some tyres on but am bit confused , have got 215 * 50* 17 on atm but would i be right in thinking that if i put 235 * 45 * 17 on the car will handle a bit better.

thanks clembo

[John LE]

225 45 r17 is the alternative size recommended by VX, it's in the hand book. 235's would be pushing it

[Big Dave]

if i put 235 * 45 * 17 on the car will handle a bit better.

Depends on the make of tyre.

Also in the wet a wider tyre could actually make the handling worse as you've a larger footprint on the road which could aquaplain far more than a narrow tyre.

But as said by John, the alternate size for 215/50/17 is 225/45/17.

[clembo38]

hi thanks for the reply have been Lizzy of late,have just done the tyre calculator size if i go for 225/45/17 the car will be running 1.9 mph faster than the slandered tyres, but put in 235/45/17 its just 1/2 mph faster so my thinking its better for speedo accuracy,or is that not the case.

thanks clembo

[m8internet]

Presumably you actually mean a % rather than mph variance

I posted about this before, changing from 215/50R17 to 225/45R17
My car now runs faster than the displayed speed, but it is still within the Vehicle Construction Act tolerance of 10%

[john_k_sri]

235's are only recommended by VX for 19" wheels and then only with a 35% side profile - i.e. 235/35/19

225's with a 45% side profile are recommended for 17" and 18" wheels - i.e 225/45/18 or 225/45/17

215's with a 50% side profile are recommended for 17" wheels - i.e 215/50/17

[Big Sig]

hi thanks for the reply have been Lizzy of late,have just done the tyre calculator size if i go for 225/45/17 the car will be running 1.9 mph faster than the slandered tyres, but put in 235/45/17 its just 1/2 mph faster so my thinking its better for speedo accuracy,or is that not the case.

thanks clembo

That's all ok assumingits correct now, which it's not.

[clembo38]

thanks all meant percentage don't know why i put mph. i now under stand.

thanks clembo

[davidj387]

I can chip in here as I have just replaced the original fit Goodyear Eagle NCT5 which were 215/50/17 with Michelin Primacy HP 225/45/17.

Even though they are wider, the lower profile still makes the sidewall smaller, and overall it does make the wheels look a bit smaller but I will get used to that as it's only a bit.

The speedo can be corrected if you have access to a Vaux-Com programmer. You can program in a different tyre size and the speedo reading will be correct again. Doesn't make a lot of difference though.

The handling is transformed by the way. These Michelins are great, there is less roll in corners and a lot more grip than the Goodyears. Also I am still getting the comfort I like from my 'old man' elite spec. Nice and quiet too.