Tyre legality question - Page 2

Weso · 10th October 2017, 20:13

Ignoring the Insurance implications for a moment, I have a Mondeo ST TDCI estate late 2006 running on standard fitment of 225/40/18's. Did not think any Mondeo went bigger than that, perhaps the very latest models do?

If you go up a size in profile you need to go down a size in width to remain "vaguely" similar rolling diameter. More importantly you might retain enough clearance especially on the front. I know from the Ford forums if i went up to 225/45/18 on mine (ZT size) i would have clearance problems on full lock at the front.

Only good thing about running 225/40/18's on mine is that they are so much cheaper than ZT size!

Curious to know what year of Mondeo you have..

macafee2 · 10th October 2017, 20:13

Quote:

Originally Posted by Vanbursta

I have seen a few post where people have changed the profile of their tyres (Up) to gain a smoother ride. What are the insurance implications if you have an accident and non standard tyre sizes are fitted, would they invalidate the insurance?

I ask because I have a car with 235/40/18s and would like to got up to either 45 or 50 profile and am not sure if it is something that you are allowed to do, or if they would affect the handling, I know there would be less road noise and that's what I want.

is this not a question better directed to your insurance company?

macafee2

cb750chris · 11th October 2017, 11:29

May be worth looking in the handbook, and seeing if your desired tyre size was ever fitted as an option.
If so, then your insurance company should not be too bothered - after all at some point Ford would have deemed it acceptable (but best to inform them anyway, just in case)

But that brings the other question - How does an insurance company assess what is an acceptable change - I know many people who would just buy the same as what is fitted, without ever checking the handbook - should they be penalised for not knowing the tyres were not standard?

11th October 2017, 11:29	#13
cb750chris Trader Rover 75 Tourer Join Date: Apr 2011 Location: Portsmouth Posts: 849 Thanks: 201 Thanked 292 Times in 200 Posts	May be worth looking in the handbook, and seeing if your desired tyre size was ever fitted as an option. If so, then your insurance company should not be too bothered - after all at some point Ford would have deemed it acceptable (but best to inform them anyway, just in case) But that brings the other question - How does an insurance company assess what is an acceptable change - I know many people who would just buy the same as what is fitted, without ever checking the handbook - should they be penalised for not knowing the tyres were not standard? __________________ Now offering T4 services in the Fareham area Replacement keys programmed / supplied / cut Diesel 135 upgrade available IPK virginisation and T4 matching available Sorry, due to a big change in home circumstances, I am unable to do any large jobs at present, but can still offer evening time diagnostics.

10th October 2017, 20:13	#11
Weso I really should get out more....... Mondeo ST TDCI Estate Join Date: Jul 2012 Location: Norwich Posts: 2,834 Thanks: 919 Thanked 358 Times in 284 Posts	Ignoring the Insurance implications for a moment, I have a Mondeo ST TDCI estate late 2006 running on standard fitment of 225/40/18's. Did not think any Mondeo went bigger than that, perhaps the very latest models do? If you go up a size in profile you need to go down a size in width to remain "vaguely" similar rolling diameter. More importantly you might retain enough clearance especially on the front. I know from the Ford forums if i went up to 225/45/18 on mine (ZT size) i would have clearance problems on full lock at the front. Only good thing about running 225/40/18's on mine is that they are so much cheaper than ZT size! Curious to know what year of Mondeo you have..