Why 20" front and 21" rear?
07-31-2019, 12:45 AM
#3
RL Community Team
Rennlist Member
Rennlist Member
Increase rear end traction (esp. important since the 911 has a rear weight bias)
Increases the rake, which allows for greater downforce and better front-end grip
Increases the rake, which allows for greater downforce and better front-end grip
07-31-2019, 09:19 AM
#4
How does having this stagger create better traction?
07-31-2019, 09:41 AM
#5
Burning Brakes
I think most try to argue you have to have bigger wheels to have wider tires.... well no that's just not completely true.
I think the "rake" answer is more true for traction - and the other side of it is simply aesthetics.
Combination of filling out the wheel wells to fit the desired aesthetic + wanting a certain sidewall height (for road feel: shorter sidewalls = less squirm).
Then there's how easy it is to get a certain tire aspect ratio, what that might cost from manufacturers, etc....
It's definitely not simply "more traction"
I think the "rake" answer is more true for traction - and the other side of it is simply aesthetics.
Combination of filling out the wheel wells to fit the desired aesthetic + wanting a certain sidewall height (for road feel: shorter sidewalls = less squirm).
Then there's how easy it is to get a certain tire aspect ratio, what that might cost from manufacturers, etc....
It's definitely not simply "more traction"
07-31-2019, 10:09 AM
#6
Three Wheelin'
Traction. Contact patch on 21 is bigger than 20.
07-31-2019, 11:33 AM
#7
Race Director
Wider and heavier 992 needs it to hit performance targets. Still find it bizarre. The GT3 doesn't even need a 21", but the RS does have it.
Looks odd on the Carrera line of models in my opinion.
Looks odd on the Carrera line of models in my opinion.
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07-31-2019, 01:09 PM
#8
Three Wheelin'
Thread Starter
The staggered setup just seems like a hassle to me, especially on non-GT models but there must clearly be an engineering reason for doing it. It does increase rake slightly while preserving wheel / fender gap for aesthetics. The increased rake would put incrementally more weight over the rear for traction.
i also can’t help but think it’s also in preparation for electrification / hybrid tech in the 992.2, perhaps because the electric motor is going to be in front.
i also can’t help but think it’s also in preparation for electrification / hybrid tech in the 992.2, perhaps because the electric motor is going to be in front.
Last edited by titleistaddict87; 07-31-2019 at 02:12 PM.
07-31-2019, 03:27 PM
#9
I think most try to argue you have to have bigger wheels to have wider tires.... well no that's just not completely true.
I think the "rake" answer is more true for traction - and the other side of it is simply aesthetics.
Combination of filling out the wheel wells to fit the desired aesthetic + wanting a certain sidewall height (for road feel: shorter sidewalls = less squirm).
Then there's how easy it is to get a certain tire aspect ratio, what that might cost from manufacturers, etc....
It's definitely not simply "more traction"
I think the "rake" answer is more true for traction - and the other side of it is simply aesthetics.
Combination of filling out the wheel wells to fit the desired aesthetic + wanting a certain sidewall height (for road feel: shorter sidewalls = less squirm).
Then there's how easy it is to get a certain tire aspect ratio, what that might cost from manufacturers, etc....
It's definitely not simply "more traction"
I am thinking the stagger is mainly geared towards aesthetics rather than performance.
07-31-2019, 03:34 PM
#10
That is not true. 21 and 20 are referring to the diameter of the wheel and not the width, which is what influences tire contact patch and traction. For example using a Michelin ps4s tire, a 295/30/20 tire has the same width/contact patch as a 295/25/21 tire. So moving up from 20" to 21" produces no difference in how much rubber is on the road.
07-31-2019, 03:50 PM
#11
Three Wheelin'
That is not true. 21 and 20 are referring to the diameter of the wheel and not the width, which is what influences tire contact patch and traction. For example using a Michelin ps4s tire, a 295/30/20 tire has the same width/contact patch as a 295/25/21 tire. So moving up from 20" to 21" produces no difference in how much rubber is on the road.
07-31-2019, 04:27 PM
#12
07-31-2019, 05:12 PM
#13
That is not true. 21 and 20 are referring to the diameter of the wheel and not the width, which is what influences tire contact patch and traction. For example using a Michelin ps4s tire, a 295/30/20 tire has the same width/contact patch as a 295/25/21 tire. So moving up from 20" to 21" produces no difference in how much rubber is on the road.
07-31-2019, 06:20 PM
#14
But it will have 305/30r21 compared to 991 305/30r20, so while the width that meets the road may not be notably different, the contact patch in theory will be slightly larger due to taller diameter/ larger circumference and more rubber meeting the road front to rear of the tire's surface.
07-31-2019, 07:12 PM
#15
Race Director
Originally Posted by gatorfast
Yea I just remember the days not too long ago where 20"+ wheels were reserved for Escalades driven by rappers. How the times have changed lol
26" wheels are the new 20"
