Technical OEM wheels and tyres

Currently reading:
Technical OEM wheels and tyres

koalar

Distinguished member
Joined
Oct 24, 2016
Messages
9,232
Points
2,098
Location
Cheshire
Wheels and tyres work together, It's best to keep as close to original as possible

There is a difference between handling and grip, handling can't be assessed on a road you need to be at and passed the limits of grip

Banging a wider on any old rim will not always produce the best handling and stable car

Fiat go to the trouble and expence of altering the ET for different widths

ET41 155
ET38 165
ET32 185
ET30 195

Take just the spare space saver, fiat fit three different diameters in two different widths

There is a bit of leeway, but adding a wide tread to a narrow rim will result in more sidewall flex, more edge tyre wear. To some extent you can counter this by pumping up the tyre but it's a comprimise and the ride will now suffer

Hopefully I have caught all the auto correct errors every time I type R13 it corrects it to R14 for some reason


Fiat panda 100hp
6.5J x 15 ET30 195/45 R15
5.5J x 14 ET32 185/55 R14
Spare
4.00B x 15 ET 35 125/70 R15

Fiat panda 4x4
5.5J x 14 165/70 R14
Spare
4.00B x 14 135/80 R14

Climbing
5.5J x 14 185/65 R14
5.5J x 14 165/70 R14
Spare
4.00B x 14 135/80 R14

Cross
5.5J x 14 185/65 R14
Spare
4.00B x 14 135/80 R14

6J x 15 175/65 R15
Spare
4.00B x15 125/80 R15

Emotion
5Jx14 165/65 R14
Spare
4.50B x 13 135/80 13

Active. Actual, dynamic
5B x 13 ET41 155/80 R13
5J x 14 ET38 165/60 R14
Spare
4.50B x 13 135/80 13
 
Last edited:
Also worth remembering that fitting spacers, with appropriate length bolts, can also effect loading…once you go outside the parameters of the max size wheel and tyre combination
 
Back
Top