Tyre replacement question

[Ares1000101]

Tyre Size Calculator

A better easy to use tyre size calculator. Use our tyre size calculator to find tyre diameter, width, sidewall, circumference, and revolutions per mile.

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click on the tyre comparison tab. You want a tyre that is close in circumference to existing tyre to minimize speed discrepancy.

 

[Hemi300c]

So @Hemi300c
If i change from oem spec 225/55/19 to 235/55/19.
It should be fine with not much difference in the drive and speedo clock as for comfort i am keeping the same profile.

Nope the 235 would be a different radius thats why I went from a 60 profile to a 55 profile which was the closest.

 

[Neuk_]

Nope the 235 would be a different radius thats why I went from a 60 profile to a 55 profile which was the closest.

The 235/55 has only a 1.5% larger rolling circumference than the 225/55. If you drop to a 45 profile and go wider to 235, assuming this is an option, the rolling circumference is 2.2% smaller than the 225/55. The 235/55 is the best option in terms of percentage change to rolling circumference ignoring all other factors.

 

[Sinbad]

/cries in 295/35/21

 

[WAslayer]

/cries in 295/35/21

35..???!! Holy hell.. might as well be driving on the rims..

 

[Sinbad]

35..???!! Holy hell.. might as well be driving on the rims..

10cm sidewall...

 

[unobeat]

/cries in 295/35/21

Tjo tjo tjo
Not a cheap tyre at all and that in a small profile.

 

[unobeat]

The 235/55 has only a 1.5% larger rolling circumference than the 225/55. If you drop to a 45 profile and go wider to 235, assuming this is an option, the rolling circumference is 2.2% smaller than the 225/55. The 235/55 is the best option in terms of percentage change to rolling circumference ignoring all other factors.

So Nick i should be good running 235/55/19 as I still want same comfort just wider tyre.

 

[Neuk_]

So Nick i should be good running 235/55/19 as I still want same comfort just wider tyre.

19"? Assuming you are staying 18" and not knowing exactly why you don't want or can't get the OEM size, I would go for the 235 tyre with the same side profile as it is the closest to OEM spec.

 

[unobeat]

19"? Assuming you are staying 18" and not knowing exactly why you don't want or can't get the OEM size, I would go for the 235 tyre with the same side profile as it is the closest to OEM spec.

Yes 19"
Want a bit wider tyre.

 

[Neuk_]

Yes 19"
Want a bit wider tyre.

Sorry, I am confusing you with the OP A 235 should be fine, it is not much wider and will only add 1.7% to the rolling circumference as the side profile increases slightly.

 

[Neuk_]

/cries in 295/35/21

I thought my 275/45/20's were bad

 

[killerbyte]

This is why I went for 18-inch wheels on my car and not 19s. 225/40/18 high performance tyres are expensive enough.

 

[Sinbad]

I thought my 275/45/20's were bad

Oh and they need to be N rated. So the likes of Kumho, Nexen etc are not an option ... Michelin or Pirelli.

 

[Neuk_]

Oh and they need to be N rated. So the likes of Kumho, Nexen etc are not an option ... Michelin or Pirelli.

More than you can afford pal, Porsche

The ‘N’ rating is unique to Porsche and only given to tyres that have been approved by Porsche engineers in Weissach. It is essential that only N rated tyres are fitted to your Porsche as the wrong speed or load ratings on your tyres could create a problem in the event of an insurance claim following an accident.

Porsche Approved Tyre Programme Johannesburg - Porsche Middle East

www.porsche.com

.

 

[unobeat]

Thanks for the info.

 

[unobeat]

Oh and they need to be N rated. So the likes of Kumho, Nexen etc are not an option ... Michelin or Pirelli.

Please elaborate.

 

[Sinbad]

Please elaborate.

 

[myBBexpert]

It's an Infiniti Q50. So the general consensus is 235 50 R18?

 

[Geoff.D]

Are the stones optional extras?