Mixing tyre widths
Discussion
It depends how much you hate your brother in law.
If you only feel mildy resentful toward him, fit the wider tyres at the rear.
If you really hate his guts, fit the wider tyres at the front.
If there's a chance of your sister being in the car with him a significant part of the time (...and assuming you don't hate her enough to want her dead), I'd tell him to stop being such a
cheapskate and to fit the correct tyres all round.
If you only feel mildy resentful toward him, fit the wider tyres at the rear.
If you really hate his guts, fit the wider tyres at the front.
If there's a chance of your sister being in the car with him a significant part of the time (...and assuming you don't hate her enough to want her dead), I'd tell him to stop being such a
cheapskate and to fit the correct tyres all round.Munter said:
Regardless of the safety issues related to grip/handling. The sets would have different diameters. Which could upset the traction control into taking some interesting actions.
The diameters would be the same wouldn't they? I would never fit different diameters without really knowing what I was doing. (Which I dont)Doesn't sound like a good idea anyway...
Captain Vimes said:
The diameters would be the same wouldn't they? I would never fit different diameters without really knowing what I was doing. (Which I dont)
Doesn't sound like a good idea anyway...
Since they are both 55 profile tyres the wider one will also have a larger rolling radius.Doesn't sound like a good idea anyway...
To be honest the difference in diameter is about a 1.1cm, which is less than the difference between a new and a bald tyre. And as for the difference in contact patch, again, it's 1cm, which is probably no different to running higher or lower pressures.
So ignore the claims you will be killing your sister and brother in law, chance are there will be absolutely no noticeable differences what so ever.
So ignore the claims you will be killing your sister and brother in law, chance are there will be absolutely no noticeable differences what so ever.
Nick3point2 said:
So ignore the claims you will be killing your sister and brother in law, chance are there will be absolutely no noticeable differences what so ever.
My post was tongue in cheek, hence the smiley. 
You would need to consider how to explain the mix of tyres to your insurance company, however, if there was ever a serious accident.
Sam_68 said:
You would need to consider how to explain the mix of tyres to your insurance company, however, if there was ever a serious accident.
Why? Would you feel the need to explain why you had different tyre brands front and rear? A top of the range tyre vs a borderline illegal ditchfinder of the same size will create a much bigger issue than what the OP is talking about.Nick3point2 said:
Why? Would you feel the need to explain why you had different tyre brands front and rear? A top of the range tyre vs a borderline illegal ditchfinder of the same size will create a much bigger issue than what the OP is talking about.
One is inadvisable, but complies with manufacturer specification.The other is inadvisable and doesn't, therefore requires declaration to your insurance company.
toger13 said:
might upset the ABS even if it doesnt have traction control due the the rolling radius but very mich doubt it will effect anything else
Si
The reason I mentioned it was there was a thread a year or so ago where someone fitted different radius tyres to a Mondeo (tyre place said it'd be ok) and the TC get cutting the power. The difference was much bigger than being discussed here, but who knows how much of a difference is needed to trip these things up.Si
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