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[Olympia5776]

About to fit 17" rims .Whilst doing a check on aspect ratio I find that the closest to the 225 55 16 tyres currently fitted is 225 50 17 . I believe the standard fitted tyre size to MV6 and Elite was 225-45 17 .
Anybody running 50 profile 17's ?
50's would be much better  due to the tracks , sorry roads we have down here in SW Ireland.
Don

[VXL V6]

The tyre size for the UK spec Omega with 17's is 235/45/17.

HTH  

[Danny]

I second that answer, for confirmation

[TheBoy]

Yup, retail MV6 and facelift Elites have 235/45ZR17 tyres...

[Olympia5776]

10Thanks lads ,but my calculations still suggest that a 50 series 225 section tyre on a 17" rim would be closer to the rolling radius and total wheel diameter of the 55 series on a 16".
45% of 235 =105.75 x 2 =211.5 + 431.8 (17" in mm ) =643.3  total wheel dia.
45% of 225 = 101.25 x 2 = 202.5 + 431.8 =               =634.3        "
50% of 225=  112.5  x 2 = 225    + 431.8                   =658.8
55% of 225=   123.75 x 2=247.5  + 406.4 ( 16" in mm)=653.9
or have I got it wrong ?
Does anybody run or have run 50 series 17" tyres on an Omega ?

Don

[Elite Pete]

Try this

http://www.tyresave.co.uk/tyresize.html

[cem_devecioglu]

if you pass over % 45 limit for 17 (235 45 17 ) curve handling capacity will be worser..Even little softer tires effect curve handling..

[TheBoy]

For all the calibration stuff (ie instruments and MID), all the wheels/tyre sizes use the same configs with the exception of the 225/55R16 which need a different config due to rolling diameter

[Olympia5776]

Try this

http://www.tyresave.co.uk/tyresize.html

This seems to confirm my calculations  :-/

"Curve handling characteristics " never heard of that before ,what is it ?
But no Quantum Physics please my head already hurts  

Oh and thanks for all the replies so far lads.  

Don

[cem_devecioglu]

Higher thickness means more elasticity which is good for holes preventing your rims but bad for curves ..

And also remember the formula > force * distance which means higher stress at the edge point for tire teeths (combines with elasticity) ..Here the force is car's vertical mass point pointing outside the curve ..Just for that reason race cars have very thin tires from the rims..

[Olympia5776]

Higher thickness means more elasticity which is good for holes preventing your rims but bad for curves ..

And also remember the formula > force * distance which means higher stress at the edge point for tire teeths (combines with elasticity) ..Here the force is car's vertical mass point pointing outside the curve ..Just for that reason race cars have very thin tires from the rims..

Ohhhh Cem_D I mean no disrespect but that sounds like a black hole in space , useless but very profound  
It actually explains the reason why I would have prefered 50 series tyres " higher thickness means more elasticity "
In simple terms I drive on two roads, a 45 mph road and a 55 mph road. There are no dual carriegways for 60 miles ( I havn't seen a motorway since I left London three years ago ).
Its blissfull but bumpy.
I think we've done the subject to death now so I'll just go for 45 's         :-/or maybe 50's

Thanks Don
PS here's the 45 mph road

[cem_devecioglu]

 

if you drive on slow roads % 45 thickness not necessary. These low profile tires have importance at really high speeds which you will not use..

ps: picture is very nice ..fresh and clean air which I dont see in the city..

[Kevin Wood]

I toured Ireland in the Westfield a few years ago.. On 205/50/15's IIRC, but that's irrelevant when your @rse is 6" from the ground. Something that absorbs bumps would probably be a good idea. Make sure they're waterproof, too!  

Kevin