19's front - 20's rear ...?

[Garcia172]

What's the advantage?

Performance Benefits

• Acceleration: Larger rear wheels increase the contact patch with the road, enhancing grip during acceleration. This is particularly beneficial for rear-wheel-drive (RWD) and all-wheel-drive (AWD) vehicles, as weight shifts to the rear during acceleration.
• Stability: A larger rear wheel helps stabilize the car when exiting corners, improving handling dynamics.

Design Considerations

• Aesthetics: Many sports cars, including Ferraris, use larger rear wheels for visual appeal. This design choice can create a more aggressive stance and enhance the overall look of the vehicle.
• Weight Distribution: Larger rear wheels can help balance the vehicle's weight distribution, which is crucial for high-performance driving.

Handling Dynamics

• Steering Response: Smaller front wheels reduce steering inertia, allowing for quicker turns and better handling. This setup helps manage understeer, making it easier for drivers to control the vehicle.
• Contact Patch: While larger rear wheels provide a longer contact patch, smaller front wheels can improve turn-in response, making the car more agile.

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[Garcia172]

Ghetto.

Guess Ferrari is Ghetto lol

 

[robvas]

Performance Benefits

• Acceleration: Larger rear wheels increase the contact patch with the road, enhancing grip during acceleration. This is particularly beneficial for rear-wheel-drive (RWD) and all-wheel-drive (AWD) vehicles, as weight shifts to the rear during acceleration.
• Stability: A larger rear wheel helps stabilize the car when exiting corners, improving handling dynamics.

Design Considerations

• Aesthetics: Many sports cars, including Ferraris, use larger rear wheels for visual appeal. This design choice can create a more aggressive stance and enhance the overall look of the vehicle.
• Weight Distribution: Larger rear wheels can help balance the vehicle's weight distribution, which is crucial for high-performance driving.

Handling Dynamics

• Steering Response: Smaller front wheels reduce steering inertia, allowing for quicker turns and better handling. This setup helps manage understeer, making it easier for drivers to control the vehicle.
• Contact Patch: While larger rear wheels provide a longer contact patch, smaller front wheels can improve turn-in response, making the car more agile.

Get out of here with that ChatGPT crap

 

[Garcia172]

Get out of here with that ChatGPT crap

The list is much larger. Personally, I like the look. The car could use a slight rake. This allows you to get the same tire-to-fender gap, but with the slight almost unnoticeable rake.

But you can cry about LLM, but it is a fact Jack... :-) Go look at factory Porsche Cup cars as an easy example... while the rim diameter is the same, the rear Michelin slicks are much much taller and bigger in diameter (710's) than the front. I know because I've raced them for many years.

As far as OEM street cars go.... I guess GM(Corvette), Ferrari, Lambo, & Porsche (Street cars) don't know what they're doing but you do. Got it.

 

[robvas]

The list is much larger. Personally, I like the look. But you can cry about LLM, but it is a fact Jack... :-)

Not really.

One, you didn't answer my question. Which was what's the advantage of using a bigger wheel in the back.

Then you post some bullshit like:

• Acceleration: Larger rear wheels increase the contact patch with the road, enhancing grip during acceleration. This is particularly beneficial for rear-wheel-drive (RWD) and all-wheel-drive (AWD) vehicles, as weight shifts to the rear during acceleration.
• Stability: A larger rear wheel helps stabilize the car when exiting corners, improving handling dynamics..
• Weight Distribution: Larger rear wheels can help balance the vehicle's weight distribution, which is crucial for high-performance driving.

This goes completely against what any road racer or drag racer will tell you.

 

[Garcia172]

Not really.

One, you didn't answer my question. Which was what's the advantage of using a bigger wheel in the back.

Then you post some bullshit about smaller front wheels being better for handling and bigger wheels being better for acceleration.

The question was answered.

 

[robvas]

The question was answered.

No it wasn't. Don't spam the forums with useless LLM drivel.

 

[Garcia172]

No it wasn't. Don't spam the forums with useless LLM drivel.

Because I quoted it doesn't mean it's wrong or "drivel". Just a time-saver. And it's very much correct.

So here goes... larger rear wheels have more surface area (circumference) which means they get take longer to over heat (extremely important with slicks... and ultra high performance tires that have compounds approaching (getting closer to) that of R & slick tires. Front tires... everyone in racing knows that front tires are a trade-off between tire width (contact patch) and faster turn-in which comes with a lighter wheel... smaller wheels are lighter > inertia (feel & response). Trail braking... the larger rear tires (along with the proper differential setup) make a night & day difference.

Those are the biggies.

 

[robvas]

Because I quoted it doesn't mean it's wrong or "drivel". Just a time-saver. And it's very much correct.

So here goes... larger rear wheels have more surface area (circumference) when means they get take longer to over heat (extremely important with slicks... and ultra high performance tires they have compounds approaching (getting closer to) that of R & slick tires). Front tires... everyone in racing knows that front tires are a trade-off between tire width (contact patch) and faster turn-in (feel & response). Trail braking... the larger rear tires (along with the proper differential setup) make a night & day difference.

Those are the biggies.

But road racers and drag racers don't run 20 inch wheels.

 

[Garcia172]

But road racers and drag racers don't run 20 inch wheels.

Nobody is talking about drag racing. And the diameter of the wheel isn't the issue... it's the differences in the diameters between front and rear and the effect it has on the handling of the car as well as helping to keep the driving tires from over heating. It doesn't matter if it's a 18"/19" setup or a 19"/20" setup. The concepts are exactly the same.

You may not like the look of a 20" on theS S650 (and maybe it's too much looks wise), but there are valid reasons to do so.

As I explained... for me personally... I think the car (looks wise) needs a tiny bit of rake, and the way you do it to keep the same tire-to-fender gap is with a staggered (diameter wise) setup.

The issue then becomes electronics. I've already been researching making customer trigger (reluctor) wheels on one axle to compensate for the difference in diameters (have had to do this on another car previously) for the purposes of not tripping up the ABS. But it appears (speculation) that the GPS and the computer may have a problem when the speed of the car and the speed of the wheels don't jive. That's what's kept me from pulling the trigger.

 

[Garcia172]

But road racers and drag racers don't run 20 inch wheels.

I don't know about drag racing... but road racing rim choice is very much determined by the tire availability (and rules). The best slicks are Michelins and they aren't making those in 20" sizes. They make them primarily in 18".

 

[robvas]

I don't know about drag racing... but road racing rim choice is very much determined by the tire availability (and rules). The best slicks are Michelins and they aren't making those in 20" sizes. They make them primarily in 18".

Again....no advantage in going with a larger wheel in the rear.

My original point.

You just posted a ton of generic drivel from an LLM for no useful reason.

 

[Garcia172]

Again....no advantage in going with a larger wheel in the rear.

My original point.

You just posted a ton of generic drivel from an LLM for no useful reason.

It's clear you don't road race (actual racing) because if you did, you would understand.

I've been doing this for a very very long time and am speaking for direct experience.

Here's a pic from one of my former race cars. Look at the tires diameter differences. There's a reason why..... Which I clearly explained.

As you can see here... the rear tires are much much taller than the front tires. Both are 18" diameter rims. But the rear are effectively 2" -3" larger. Why? Go reread my reply.

"generic drivel". lol

 

[robvas]

Nobody's talking about those cars.

and you're running the same size wheels front and rear. So again what's your point?

you know what wheels and tires are right? They aren't the same thing

thank you fancy race car man

 

[robvas]

"What's the point of running a 19" in front and a 20" in back?"

*chatgpt cut and paste*

Have you seen my race car?

Great. You have 18" front and back. Nothing relevant to this discussion. What's your favorite flavor of crayon again?

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