hello,

 

hoping they are well,

 

I have a query, I want to change the measurements of my tires from 215/45 r16 to 215/55 r16, in order to improve the ride comfort, since where I live the streets are very bad,

 

My question in particular, this measure that from what I see is not approved by skoda for the fabia will affect something beyond varying the speedometer between 5 km / h more than what the tachometer indicates, or it could affect some mechanical component of the car to future?

This is the problem with this decades old fashion of having oversized wheels and tyres on road cars.  There is no real need for these over-wide wheels and tyres and the wheel size only needs to clear and ventilate the brakes and take the weight of the vehicle fully loaded.

 

You get a nominal 24% increase in sidewall and a nominal 22mm and 44mm to fit under the wheel arch.  (3% 7% difference to speedo.)

 

I'm not sure how this might affect your warranty as Skoda would say that the car's suspension has not been engineered for that size of tyre and who knows what wobbles the computer programmes might have.

 

Ride comfort will also depend on the type make, model and composition of the tyre too.

 

If your model also had the 15" wheel option (Fabias could easily use 14" wheels) then that would be the way to go perhaps and less unsprung weight depending on wheel and tyre.  That's if you can take the frightening prospect of having only a nominal 185mm width tyre (which if you wanted could possibly have more more grip than a (245 typo) 215, all about the compound of the tyre tread) depends on how fashion conscious you are and how much you are influenced by others.

 

Do check what will affect your warranty though.

 

https://tiresize.com/calculator/ 

 

Edited 20 November, 20214 yr by nta16
typo

I have no idea about rules, regulations and enforcement in your part of the World, but in the UK things would go badly wrong for you if there was an accident and the insurance found out you had the wrong size tyres on the car.

 

In terms of speedometer error, you would get under reading  of 5 mph / 8 kph at 70 mph using the site @nta16 provided above.

 

It might be better to opt for 185/55 R16, or even a set of smaller wheels with the size of tyre Skoda expect to be fitted.

 

Take care,

 

John H

John makes some good points and showed I'd put a wrong figure for speedo error.

 

Depending on the tyre manufacturer 185/55r16 might not be recommended for a 7" width rim, that tyre size calculator shows it as for 5-6.5" rim and only a nominal 5mm extra to sidewall.

 

This year I changed the tyres on my car ( not a Fabia) from  (don't be scared now) 145/80r13 to 155/80r13 and because of supply issues had to have a more comfort than grip tyre but the improved ride comfort over the poorly maintained English roads is very much appreciated.

 

Good point about rim width - yet another way of getting it wrong...

When you start comparing more than two tyre sizes it gets harder to keep track of all the figures - but on the other tab of that link it lists alternative (USA) sizes  with rim widths for the given tyre size and I know 185 can usually go on to 5" rims.

 

 

thanks for your contributions,

 

I'm checking with the skoda dealer from here in Chile if the measure I want to fit is compatible.

 

I was also looking at placing a 205/55 r16 measure because I know someone who occupied that measure and it went well, I leave a photo of how it looked

 

but I am waiting for the dealer's responses. 

In the UK the size of tyres approved for the vehicle are behind the fuel filler cap on the tyre pressures chart.

 

185 60 15 on a 6J X 15 wheel is approved.

This will improve your ride comfort.

 

Thanks, AG Falco

Looks are a matter of personal taste but fit is important the tyre needs clearance to allow for suspension travel and to miss anything that shares the wheel arch area (and to allow for weather conditions in places like the UK).

 

215/55R16 is a taller tyre so this will also raise the points of suspension above and below. - https://www.wheel-size.com/calc/

 

The tyre itself, the make, model, type and make up is important to the ride comfort and noise too. 

Edited 19 November, 20214 yr by nta16

I wouldn't be surprised if 215/55R16 rubs in the wheel arches. They are a large tyre.

@Carlston is a fount of knowledge when it comes to tyres and alloy wheels.

And also springs and shock absorbers, an Encyclopaedic knowledge!

10 minutes ago, J.R. said:

And also springs and shock absorbers, an Encyclopaedic knowledge!

 

I can't offer the same, unless you're asking about Mk1 Fabia interiors...

21 hours ago, gruger said:

I want to change the measurements of my tires from 215/45R16 to 215/55R16, in order to improve the ride comfort, since where I live the streets are very bad,

 

The outside diameter of either 205/55R16 or 215/55R16 is too big for the Fabia MK3.

 

185/65R15 or 195/55R16 is as big an outside diameter as you can go on the Fabia MK3.

 

185/60R15 tyres fitted to 6Jx15 ET38 5/100 57.1 rims is a standard fitment on the Fabia MK3, so maybe try that size...although the higher sidewalled 185/65R15 would provide even more comfort.

 

215/45R16 does give a "relatively" hard ride. 185/60R15 or 185/65R15 will be a lot better.

 

If you want to stick with 16" rims, you need to change your relatively wide 7Jx16 ET46 rims to something narrower such as 6Jx16 ET35 (from the Skoda Scala) and fit 195/55R16 tyres. Steel rims are also available in this size and offset. However, the 15" option is better for comfort than the 16" option, but 195/55R16 on 6J rims is still a big improvement over 215/45R16 on 7J rims.

 

6Jx16 ET35 5/100 57.1

https://eshop.skoda-auto.cz/cs_CZ/kolo-z-lehke-slitiny-nanuq-16-pro-scala-kamiq/p/654071496B+8Z8

 

6Jx16 ET35 5/100 57.1

https://eshop.skoda-auto.cz/cs_CZ/kolo-z-lehke-slitiny-nanuq-16-pro-scala-kamiq/p/654071496C+FL8

 

Edited 20 November, 20214 yr by Carlston

2 hours ago, Carlston said:

 

El diámetro exterior de 205 / 55R16 o 215 / 55R16 es demasiado grande para el Fabia MK3.

 

185 / 65R15 o 195 / 55R16 tiene un diámetro exterior tan grande como el que se puede alcanzar en el Fabia MK3.

 

Los neumáticos 185 / 60R15 instalados en llantas 6Jx15 ET38 5/100 57.1 son un accesorio estándar en el Fabia MK3, así que tal vez pruebe ese tamaño ... aunque el 185 / 65R15 con paredes más altas proporcionaría aún más comodidad.

 

215 / 45R16 da un paseo "relativamente" duro. 185 / 60R15 o 185 / 65R15 serán mucho mejores.

 

Si desea seguir con llantas de 16 ", debe cambiar las llantas relativamente anchas 7Jx16 ET46 por algo más estrecho, como 6Jx16 ET35 (del Skoda Scala) y colocar llantas 195 / 55R16. Las llantas de acero también están disponibles en este tamaño y compensación Sin embargo, la opción de 15 "es mejor para la comodidad que la opción de 16", pero 195 / 55R16 en llantas 6J sigue siendo una gran mejora con respecto a 215 / 45R16 en llantas 7J.

 

6Jx16 ET35 5/100 57,1

https://eshop.skoda-auto.cz/cs_CZ/kolo-z-lehke-slitiny-nanuq-16-pro-scala-kamiq/p/654071496B+8Z8

 

6Jx16 ET35 5/100 57,1

https://eshop.skoda-auto.cz/cs_CZ/kolo-z-lehke-slitiny-nanuq-16-pro-scala-kamiq/p/654071496C+FL8

 

And when you mean that it is too big for Fabia, what implication can this attract?

 

The person I saw and who told me about his experience had about 205/55 r16 told me that he had no problems and that when he turned the steering wheel to the maximum he had no friction with the fender or another element inside the wheel, he told me that the change comfort was very noticeable

215/45r16 =  599 mm nominal diameter (off the car)

 

205/55r16 = 632 mm nominal diameter (off the car)

 

185/60r15 = 602 mm nominal diameter (off the car)

 

15 hours ago, gruger said:

And when you mean that it is too big for Fabia, what implication can this attract?

 

The person I saw and who told me about his experience had about 205/55 r16 told me that he had no problems and that when he turned the steering wheel to the maximum he had no friction with the fender or another element inside the wheel, he told me that the change comfort was very noticeable

 

195/65R15 and 205/55R16 are both Golf/Octavia sized tyres.

 

People sometimes buy secondhand Golf MK4 6Jx15 ET38 alloy rims fitted with 195/65R15 tyres for their Fabias. I haven't heard of anyone that hasn't had problems with rubbing. 205/55R16 would be even worse as although it has the same outside diameter it's 10mm wider and uses less offset.

 

You will only know for sure if you don't have a rubbing problem if you have tested the car in all conditions, with the suspension being fully compressed.

 

Fitting tyres with little to no clearance is a bad idea. Sometimes you might not get rubbing in a straight line, but rubbing could occur under cornering forces such as driving around a roundabout or when there's a heavy load.

If smaller wheels and tyres were fitted by the manufacturers there could be more wheel arch clearance which would allow more comfort ride setting to the damper, springs and rest of suspension.  The smaller tyres with higher sidewall provide cushion too.

 

As it is now the wheels are big "filling the wheel arch" as is the fashion leaving less room for movement for the suspension so it's generally tighter and harder so as to be more controlled as it needs to be for the lack of space.

 

Imagine, as has been put in previous post, the car fully loaded with passengers and luggage taking a tight so the car squats one side with the transfer of weight and motion (more so if also braking putting weight also forward), without "stiffness" and/or wheel arch clearance the tyre would be rubbering so the tyre and car not fully controlled and potential damage if continued long term.