Best/Worst OEM Wheels

[Gad-Westy]

Always loved the wheels on the Diablo 6.0



And a bit more down to earth:

Not my car but had one of these back in the day. Loved the wheels to look at but a nightmare to keep on top of

[Ares]

2172cc said:

Basically the same wheel on a Fiesta RS Turbo but doesn't work quite as well

Yes....but in 1990 when they came out, they were awesome. My friends mum had the 1.4S, hot hatch for it's day, then when the RS Turbo came out it was just jaw-dropping and so futuristic (although never a match for the 5GT Turbo in my eyes)

[anonymous-user]

my favorite and oem...

[roverspeed]

Tigger2050 said:

roverspeed said:

Have I missed something?

Is someone suggesting that changing the width of a tyre doesn't change its total contact patch?

It's not a suggestion, it is an absolute physical fact.

So the 155/70R19 wheels that come on a BMW i3 has the same contact patch as the 245/45R18 tyres on my car?

I used this tyre calculator to work it out:

http://paws.kettering.edu/~amazzei/tire_calculator...

The static radius is 326 vs 314.

Contact patch is 158.9cm sq for the 155 vs 230.37cm sq for the 245?

[cerb4.5lee]

Ares said:

2172cc said:

Basically the same wheel on a Fiesta RS Turbo but doesn't work quite as well

Yes....but in 1990 when they came out, they were awesome. My friends mum had the 1.4S, hot hatch for it's day, then when the RS Turbo came out it was just jaw-dropping and so futuristic (although never a match for the 5GT Turbo in my eyes)

It was the car I wanted so badly when I was 20 but I just couldn't afford the insurance, so I ended up in a Sierra XR4X4 instead, but the Fiesta RS Turbo was the Daddy to me at the time.

[Tigger2050]

roverspeed said:

So the 155/70R19 wheels that come on a BMW i3 has the same contact patch as the 245/45R18 tyres on my car?

I used this tyre calculator to work it out:

http://paws.kettering.edu/~amazzei/tire_calculator...

The static radius is 326 vs 314.

Contact patch is 158.9cm sq for the 155 vs 230.37cm sq for the 245?

I don't know what parameters he has used to program this so called 'calculator' but if they produce a significantly different figure for a similarly constructed tyre then they are obvious b....cks.

Increasing the width of a tyre does not increase the area of the contact patch, just its shape, this is established physics.

However, on a smooth surface the wider lower profile wheel will have more ultimate grip. This won't hold if the wheel is heavier and the surface is ridged or bumpy as it will be in contact with road surface less than a lighter wheel.

Edited by Tigger2050 on Tuesday 19th March 21:16

[joropug]

Vauxhall Swastikas

[markp9892]

The XJS Celebration wheels

[RedSwede]

Tigger2050 said:

Increasing the width of a tyre does not increase the area of the contact patch, just its shape, this is established physics.

As I said, whilst this is technically true, wider tyres will allow in practice for a larger contact patch, because they can be run with lower pressures without getting silly deformation. To get the same contact patch from a 155 tyre as from a 255 tyre, you're going to need somewhere north of 60% more deformation, which isn't good for many reasons

[Ed/L152]

Forever stuck in the 90's:



25 years old without a mark on them.

[RedSwede]

Anyway, on-topic, only 1 for M-Parallels?

Here are some more. All their original applications I think:

[thiscocks]

Tigger2050 said:

roverspeed said:

So the 155/70R19 wheels that come on a BMW i3 has the same contact patch as the 245/45R18 tyres on my car?

I used this tyre calculator to work it out:

http://paws.kettering.edu/~amazzei/tire_calculator...

The static radius is 326 vs 314.

Contact patch is 158.9cm sq for the 155 vs 230.37cm sq for the 245?

I don't know what parameters he has used to program this so called 'calculator' but if they produce a significantly different figure for a similarly constructed tyre then they are obvious b....cks.

Increasing the width of a tyre does not increase the area of the contact patch, just its shape, this is established physics.

However, on a smooth surface the wider lower profile wheel will have more ultimate grip. This won't hold if the wheel is heavier and the surface is ridged or bumpy as it will be in contact with road surface less than a lighter wheel.

Edited by Tigger2050 on Tuesday 19th March 21:16

Surely if you are talking about contact patch between different tyres and vehicle, then yes it is most likely to be different.

[thebigmacmoomin]

Thesprucegoose said:

my favorite and oem...

Haven't seen one of these for a long time, the Ronal Teddy. There are also some ones that is a big Daisy painted white & yellow to match.

[F1GTRUeno]

joropug said:

Vauxhall Swastikas

Cannot unsee.

[Alfahol Addict]

F1GTRUeno said:

joropug said:

Vauxhall Swastikas

Cannot unsee.

[talksthetorque]

markp9892 said:

The XJS Celebration wheels

You say XJ-S but they’re clearly on a Porsche.

[2172cc]

Never liked the standard fit wheels on my 208 GTi. Too fussy by far , a simple clean design like the 205 GTi 1.9 Speedline wheels would be better.

[Escort3500]

2172cc said:

Never liked the standard fit wheels on my 208 GTi. Too fussy by far , a simple clean design like the 205 GTi 1.9 Speedline wheels would be better.

The problem is aggravated by the lack of symmetry IMO.

[littlebasher]

My son in law turned up in this

What were they thinking putting these wheels on there?

[Nickbrapp]

littlebasher said:

My son in law turned up in this

What were they thinking putting these wheels on there?

Are they the delivery casters, the hidden handles make the Velar so Slab sided, a very ugly car I think.