Tyre sizes ? What goes ...

[neil-935ql]

I currently have toyo 888 , 205/60/13 on the rear of my 7 gonna need to replace soon , looking maybe at Avon zzs but they only come in 215/55/13 , I tend to think they will fit but not 100% sure , the fronts are 185/60/13 the avons come up in a 185/55/13 for this one which I guess is ok ? Feedback is greatly appreciated, thanks

[DCL]

They'll all fit but the 205/60/R13 is a big tyre and you'll notice the different gearing. This is a good calculator that'll let you see the changes. https://tiresize.com/comparison/

[neil-935ql]

DCL said:

They'll all fit but the 205/60/R13 is a big tyre and you'll notice the different gearing. This is a good calculator that'll let you see the changes. https://tiresize.com/comparison/

Well currently my speedo reads over the actual speed so a 55 profile tyre could go some way to help that ? Saying that the difference between 60 and 55 can't be that great or at least that's what I think !

[rhauri]

Hoping not teaching you how to suck eggs, but just in case, the profile # is a ratio of the tyre width and not a straight forward measurement.

Here are the sizes for the sidewalls of the tyres you have and those that you are looking at:

185/55 - Sidewall: 4.01" / 10.19cm
185/60 - Sidewall: 4.37" / 11.1 cm

215/55 - Sidewall: 4.66" / 11.84cm
205/60 - Sidewall: 4.84" / 12.29cm

[neil-935ql]

rhauri said:

Hoping not teaching you how to suck eggs, but just in case, the profile # is a ratio of the tyre width and not a straight forward measurement.

Here are the sizes for the sidewalls of the tyres you have and those that you are looking at:

185/55 - Sidewall: 4.01" / 10.19cm
185/60 - Sidewall: 4.37" / 11.1 cm

215/55 - Sidewall: 4.66" / 11.84cm
205/60 - Sidewall: 4.84" / 12.29cm

Yes thanks I get how it works , so effectively a 55 on my current 13" wheels will result in a smaller side wall thus a smaller overall wheel diameter . So basically if I changed to 55 my wheels would need to rotate more to achieve the same distance as the 60 tyre , so I should stick to the 60 sidewall ?

[ND395]

It is circumference of your drive wheels that will affect gearing and speedo. So, if you have a 205/60 on the rear and will change to a 215/55 the difference in circumference will be small. Approx 1.5% less with the 215/55.