Fiesta Ecoboost tyres

[mikeiow]

Longish story, but to cut it short: daughter has a 2017 Fiesta, lovely little car!
2 tyres are getting low (just under 4mm), and we have some decent Goodyear ones from a previous Fiesta.
Her tyres are 195/55 R16, the Goodyears are 195/50 R16

So a slightly narrow aspect ratio. The wheels are physically different from her previous Fiesta, and the manual gives no indications of the rim size.

Anyone confidently aware whether these would definitely fit (or indeed, definitely not!) ?

I'd need to travel to her to get it seen at a tyre place for a professional opinion....just wanted to get a feel here for whether this would fail badly, or perhaps could work okay.
FWFW, I'm leaning towards the "nah, get some properly matching", but welcome useful opinions - we'd kept the tyres from the previous one but hadn't spotted the new car had different sized ones!

[ConnectionError]

I wouldn’t

Whilst only slightly different they are different to the other 2 fitted.

I would have a guess that your insurance would need to be notified of the modification.

[LuS1fer]

Very little difference. The speedo would under-read by 2 mph at 40.

The width is the same, only the rolling circumference changes

https://www.calculator.net/tire-size-calculator.ht...

[Scrump]

Not if you are only changing two tyres to a different size.

[mikeiow]

LuS1fer said:

Very little difference. The speedo would under-read by 2 mph at 40.

The width is the same, only the rolling circumference changes

https://www.calculator.net/tire-size-calculator.ht...

Would that be a "notify insurance" level of difference?

Scrump said:

Not if you are only changing two tyres to a different size.

But okay for all four?

Thanks!

[sherman]

How did you end up with 2 spare tyres in the first place?

[mikeiow]

sherman said:

How did you end up with 2 spare tyres in the first place?

Ahhh…yes….well, four actually (hence my comment above).
It’s a long story, only a bit embarrassing……me forgetting I had sorted her tyres out….she moved to Scotland for a year, & I sorted them out again

It was a short visit to Scotland for us….cramming things in….got to the depot in Glasgow only to find she had 4 perfected adequate wheels
Put new ones on anyway, kept tyres….then 6 months later, her car was stolen in Manchester.
Replacement Fiesta clearly has slightly different wheels.
Two tyres need replacing, but I could pop the 4 previous ones on (if they are okay to fit).

Or I could just flog ‘em, and she could get two new tyres. Probably easiest solution!!

[ConnectionError]

mikeiow said:

LuS1fer said:

Very little difference. The speedo would under-read by 2 mph at 40.

The width is the same, only the rolling circumference changes

https://www.calculator.net/tire-size-calculator.ht...

Would that be a "notify insurance" level of difference?

Scrump said:

Not if you are only changing two tyres to a different size.

But okay for all four?

Thanks!

If the spec is different from the manufacturers, I would notify, it doesn't matter if it is 1mm or 1000mm!

[Skyedriver]

Only comment I'd make is how old are the replacement tyres?