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The OEM, std wheel weighs with all season tire: 66.6 lbs
The Opt. Y-spoke wheel with the summer tire: 60.6 lbs. Off set is: 50 mm.
That is a 24 lb lighter wheel/tire combo for the opt. Y-spokes. Lot less unsprung weight.
The wheels are, as in many yrs back with Honda Motor Corp wheels....they are Enkei wheels. High quality.
AHC Garage just did the swap. They also showed the install of the interior carbon fiber...the 4 piece set. Front doors and the upper center console.
Easier than I thought, after reading the Acura install instructions. Watching their tech do it, shows that mech. inclined folks, they can do their own, and
save a ton of $$ over paying the dealer to install.
They are also going to do the next video..soon...on the install of the CF rear deck spoiler and the CF rear lower diffuser.
The OEM, std wheel weighs with all season tire: 66.6 lbs
The Opt. Y-spoke wheel with the summer tire: 60.6 lbs. Off set is: 50 mm.
That is a 24 lb lighter wheel/tire combo for the opt. Y-spokes. Lot less unsprung weight.
The wheels are, as in many yrs back with Honda Motor Corp wheels....they are Enkei wheels. High quality.
AHC Garage just did the swap. They also showed the install of the interior carbon fiber...the 4 piece set. Front doors and the upper center console.
Easier than I thought, after reading the Acura install instructions. Watching their tech do it, shows that mech. inclined folks, they can do their own, and
save a ton of $$ over paying the dealer to install.
They are also going to do the next video..soon...on the install of the CF rear deck spoiler and the CF rear lower diffuser.
edit doh X4 edit
That is some savings but not all that much. No details on the wheels alone? Why does Honda always make such heavy wheels?
A-Specs are like 30 lb wheels, same for 19" on the Accord Sport, 29 pounds. Totally unacceptable for an allow wheel.
That is some savings but not all that much. No details on the wheels alone? Why does Honda always make such heavy wheels?
A-Specs are like 30 lb wheels, same for 19" on the Accord Sport, 29 pounds. Totally unacceptable for an allow wheel.
That weigh in was with the tires! They did not show weighing just the wheels. And, they should have. But, the opt. $800 wheel/tire
package gets you 24 lbs less and a much better looking, more "open style" wheel. To me, the stock wheels have too many spokes,
thus hiding the red brembos.
According to Tirerack, the Pirelli P Zero (PZ4) summer tire with size 255/35/20 weighs in from 24lbs to 28lbs, depending on OEM brand customers. Subtract this tire weight from the 60.6lbs wheel/tire combo, and we will know the standalone weight of the Acura Y-spoke wheel.
Anyone heard any actual word on when the performance wheel will be ordered? It’s interesting some dealers were delivered a Type S with the upgraded wheel and my dealer is saying they aren’t fulfilling the orders for them at this point.
That weigh in was with the tires! They did not show weighing just the wheels. And, they should have. But, the opt. $800 wheel/tire
package gets you 24 lbs less and a much better looking, more "open style" wheel. To me, the stock wheels have too many spokes,
thus hiding the red brembos.
Yeah but that is still VERY heavy.
The factory A-Spec Michelins weigh about 26 lbs ea according to tirerack
The P Zero Summer tires for the Type S are 27 lbs ea according to tirerack
You can buy reasonably priced aftermarket wheels that weight an additional 10 lbs less each than those "lightweight" Acura wheels. While it might save some weight, it's not that much and you could do far better with aftermarket.
You can buy reasonably priced aftermarket wheels that weight an additional 10 lbs less each than those "lightweight" Acura wheels. While it might save some weight, it's not that much and you could do far better with aftermarket.
Does anyone know if changing weight of the wheel/tire setup affects the SH-AWD?
I wonder what weight difference between Tech, Advance. 7 lbs difference at each corner between Standard Type S and Y spoke am I right?
You can buy reasonably priced aftermarket wheels that weight an additional 10 lbs less each than those "lightweight" Acura wheels. While it might save some weight, it's not that much and you could do far better with aftermarket.
Agreed. At 33lbs each, the factory 20" Y-spoke wheel is just a regular-weight cast wheel, not "lightweight" at all.
In the industry, true lightweight wheels are mostly forged, and a typical forged lightweight wheel in 20x9" weighs in between 20 to 26lbs depending on the pricing.
Last edited by Edward'TLS; 07-05-2021 at 12:54 AM.
I feel like theer's no way (weigh?) the "lightweight" wheels are 33.6lbs. That'd be up there with the heaviest aftermarket wheels you can even buy in the size.
Does raise the question whether you should just buy the regular wheels and use them for winter tires and buy aftermarket Advan / Enkei / whatever wheels with a 255/40/19 tire to maintain same diameter as 255/35/20 (assuming it even clears the calipers). From this screenshot it looks like it would be really tight:
I prefer the look of the Y spoke wheels. While I understand the difference between un/sprung weight, I don’t know how big a deal the weight saving aspect is for the Type S. This isn’t a small car, it weighs over 2 tons. This isn’t a 2,400 pound Miata. I don’t think Acura paid attention to weight saving in any other aspect of the car, it is even larger than the previous generation TLX.
Last edited by Chargersix; 07-05-2021 at 06:51 AM.
Does raise the question whether you should just buy the regular wheels and use them for winter tires and buy aftermarket Advan / Enkei / whatever wheels with a 255/40/19 tire to maintain same diameter as 255/35/20 (assuming it even clears the calipers). From this screenshot it looks like it would be really tight:
This is actually something that I recently considered. Get the car with the regular wheels and then buy the Y-spokes and switch the tires over. Keep the originals and use with winter tires. Overall cost is also a few hundred cheaper this way too, compared to buying separate winter wheels/tires and ordering with the Y-spokes.
TLDR: Looks like if you want to go down to 19" wheels assuming brake caliper clearance (seems plausible based on the Type R running 18" wheels with 0.5" smaller rotors), 265/40/19 enables 19x9.5 wheels without messing up the speedo too bad where you get more options than 19x9 on 255/40/19. +50 offset wheels are pretty rare though with +42-45 being more common. I don't think you can go much below +40 offset though before the wheel face is pushed too far out. +40 with 9.5" wheels = 16.4mm more poke. Advan and Volk seem to have 22lb wheels that fit into this range at $400-$600 per wheel. If you jump up to $1000 per wheel or more you can obvious get whatever you want custom made but I feel that's a bit excessive for this car's price point.
I prefer the look of the Y spoke wheels. While I understand the difference between un/sprung weight, I don’t know how big a deal the weight saving aspect is for the Type S. This isn’t a small car, it weighs over 2 tons. This isn’t a 2,400 pound Miata. I don’t think Acura paid attention to weight saving in any other aspect of the car, it is even larger than the previous generation TLX.
Don't think it means much to 99.9% of the potential Type S owners will never turn a wheel in competition. They are already penalized with 19" wheels due to the size it the brakes that might or might not fit inside 18" wheels. Most, if not all wheel swaps, will be done for looks first then weight reduction.
Somebody serious enough with a 4200lbs car to get a meaningful reduction in un-sprung weight for drag racing would have swap out the current brakes to fit 17" forged lightweight wheels that will run a smaller lighter tire. Will have to wait & see but the current info suggests the TLX Type-S will not be much of a factor on grudge night at the local track.
Also the rule of thumb formula 100lbs for 1 tenth is an old one & not complete. There are other variables like % of total weight. You take 100lbs out of a 4200lb & the ET result will be different than if I take 100lbs out of my 2250lbs car. Also the numbers change based on how fast the car is to start with. The faster it is the harder it is to get improvements.
Additionally all depends where the weight comes from. 100lbs off the front helps weight transfer on launch as opposed to equal weigh off each corner. A car should always improve as it looses weight the question is how much.
Another way to think of it is 100lbs off = 10HP gained to make your calculations on ET reduction
Last edited by BEAR-AvHistory; 07-07-2021 at 12:41 AM.
great write up on lbs per wheel… Curious, does that have any relation with the SH-AWD?
Lighter is lighter so its FWD, RWD, AWD.
AWD because of additional shafts etc has highest rotational weight but better off the line traction for drag racing. The built in penalty is extra weight.
Example: BMW quotes 0-60mph for the M340 RWD @ 4.4 seconds C&D ¼-mile: 12.3 sec & the AWD @ 4.1 seconds C&D 1/4 mile: 11.9 sec. The M340 has more power than the two rear tires can handle so it needs AWD. If the RWD package was sufficient for the power then the AWD would just become dead weight. Its always a trade off in performance cars.
If your car has more horsepower than traction AWD is a good answer. I know 2 of mine would be quicker/faster with AWD. Question remains does the Type-S have the power to overcome the AWD weight.
Last edited by BEAR-AvHistory; 07-07-2021 at 01:13 AM.
Rotational inertia of rotational mass is where lighter wheels make a large difference not only in acceleration but braking as well cause they act like flyweights and the larger the radius and distance of radius to the rotational mass moment the great it affects. That's why it's so easy to spin a 30 lb driveshaft vs a 30lb wheel/tire.
Although in a 4200lb car it's not as great an effect as say a 25lb road bicycle with lighter wheels.
Don't forget that lighter unsprung weight also contribute to the tire/wheel being able to accelerate faster and stop faster too. This translates into faster lap time, other than solely focused on straight line performance.
Throttle response is most obvious. Lighter tire/wheel will response faster to throttle inputs, whereas heavy tire/wheel will feel sluggish in response to throttle inputs.
Don't forget that lighter unsprung weight also contribute to the tire/wheel being able to accelerate faster and stop faster too. This translates into faster lap time, other than solely focused on straight line performance.
Throttle response is most obvious. Lighter tire/wheel will response faster to throttle inputs, whereas heavy tire/wheel will feel sluggish in response to throttle inputs.
Not sure but I think you meant to say rotational mass or more specifically moment of inertia.
Unsprung weight includes the suspension, brake, and wheel/tire assembly, where reduction improves suspension performance.
Lighter brakes and wheel/tire helps lower the moment of inertia which makes acceleration/deceleration easier.
Doesn’t the AWD system try to compensate for the missing weight? Thinking the tires are slipping and cause unintentional wear to the system?
Why would it think the wheels are slipping? It uses the wheel speed sensors vs. output shaft sensors vs. left/right sides looking for a mismatch, it's not going to have awareness of the weight of the wheel.
It'll probably mess with the adaptive damper tuning a bit though when the wheel has less inertia going up and down.
Why would it think the wheels are slipping? It uses the wheel speed sensors vs. output shaft sensors vs. left/right sides looking for a mismatch, it's not going to have awareness of the weight of the wheel.
It'll probably mess with the adaptive damper tuning a bit though when the wheel has less inertia going up and down.
When there is less inertia going up and down, it means that the Adaptive Dampers don't have to work as hard : meaning less tear and wear, and longer service life.
Most all info says there is approx. a 21 lb weight savings with the Optional wheels. So...4 x 5.78 = 23.1 lbs. So...the numbers are close.
I'm seeing that the optional wheel is right around that 24 lb weight. Maybe someone can find an exact, verified weight.
But, this shows that it weighs a lot less than some thought on here.
Bottom line....this is a street, sports sedan with some good power and handling. Wheel weight truly is only really important when you are racing the car. This is NOT a race car, a track car, etc.
Let's keep this car "in it's own lane"...it was built to be what it is....a damn quick, sports sedan with some luxury to it...and an amazing ride and handling.
The engineers knew what they were doing when redesigning this TLX Type S....actually all versions of the TLX. They KNOW the wheel weights and matched it all up with the suspension dynamics
and what this car was to be...what Acura wanted it to be. Nothing more...nothing less. And, I believe it's a damn good sedan, that gives you a LOT for the $$.
Just to clarify - my type S came in yesterday. Did not ship from factory with Y spokes. I have to pay $345 a piece for them, not including tires. If I want to keep the all seasons, techs won’t swap tires so they’re going to send the car to a 3rd party. Said they don’t have a machine that handles a 35 series sidewall….
Most all info says there is approx. a 21 lb weight savings with the Optional wheels. So...4 x 5.78 = 23.1 lbs. So...the numbers are close.
I'm seeing that the optional wheel is right around that 24 lb weight. Maybe someone can find an exact, verified weight.
But, this shows that it weighs a lot less than some thought on here.
Bottom line....this is a street, sports sedan with some good power and handling. Wheel weight truly is only really important when you are racing the car. This is NOT a race car, a track car, etc.
Let's keep this car "in it's own lane"...it was built to be what it is....a damn quick, sports sedan with some luxury to it...and an amazing ride and handling.
The engineers knew what they were doing when redesigning this TLX Type S....actually all versions of the TLX. They KNOW the wheel weights and matched it all up with the suspension dynamics
and what this car was to be...what Acura wanted it to be. Nothing more...nothing less. And, I believe it's a damn good sedan, that gives you a LOT for the $$.
I agree that the Type-S is not a race or track car. But there is nothing prevent owners from racing or tracking the Type-S in local organized or FIA sanctioned events such as Touring Cup or factory stock events.
In those Touring Cup events, there are entries such as Civic Si, Civic Type-R, Mazda3, Golf GTi, Hyundai Velostar, Nissan 370Z, etc. Therefore, it is not out of the ordinary to see completely stock and/or mildly modified TLX Type-S to become one of the competitors in the future.
Just to clarify - my type S came in yesterday. Did not ship from factory with Y spokes. I have to pay $345 a piece for them, not including tires. If I want to keep the all seasons, techs won’t swap tires so they’re going to send the car to a 3rd party. Said they don’t have a machine that handles a 35 series sidewall….
Are you keeping the stock wheels or do you get a core charge refund ?
I agree that the Type-S is not a race or track car. But there is nothing prevent owners from racing or tracking the Type-S in local organized or FIA sanctioned events such as Touring Cup or factory stock events.
In those Touring Cup events, there are entries such as Civic Si, Civic Type-R, Mazda3, Golf GTi, Hyundai Velostar, Nissan 370Z, etc. Therefore, it is not out of the ordinary to see completely stock and/or mildly modified TLX Type-S to become one of the competitors in the future.
Good point. But, I'm wondering, those classes seem like better suited for lighter cars. The Type S at 4200 lbs is quite a bit heavier than the cars in those classes
you mentioned. And, I can't imagine anyone "stripping out the interior, etc." to lose weight to compete in those classes! LOL! But, I guess there is always someone
that far gone to do that. Who knows??
Most all info says there is approx. a 21 lb weight savings with the Optional wheels. So...4 x 5.78 = 23.1 lbs. So...the numbers are close.
I'm seeing that the optional wheel is right around that 24 lb weight. Maybe someone can find an exact, verified weight.
But, this shows that it weighs a lot less than some thought on here.
Bottom line....this is a street, sports sedan with some good power and handling. Wheel weight truly is only really important when you are racing the car. This is NOT a race car, a track car, etc.
Let's keep this car "in it's own lane"...it was built to be what it is....a damn quick, sports sedan with some luxury to it...and an amazing ride and handling.
The engineers knew what they were doing when redesigning this TLX Type S....actually all versions of the TLX. They KNOW the wheel weights and matched it all up with the suspension dynamics
and what this car was to be...what Acura wanted it to be. Nothing more...nothing less. And, I believe it's a damn good sedan, that gives you a LOT for the $$.
If true, 24 lbs is a genuine lighter weight wheel vs the 30 the math was giving. Whoever was saying 60 lbs for wheel/tire needs to get a new scale!
I recently picked up a set of y spoke wheels and I am really curious on weight. I just weighed the y spoke on a house scale. It registered 32lbs after a few times. I feel like its really around 30lbs as I’m sure the scale is not extremely accurate. Before I install I will find a shop with a scale to weigh it for me.
I recently picked up a set of y spoke wheels and I am really curious on weight. I just weighed the y spoke on a house scale. It registered 32lbs after a few times. I feel like its really around 30lbs as I’m sure the scale is not extremely accurate. Before I install I will find a shop with a scale to weigh it for me.
Yeah def gonna pick one of those up. Would come in handy for travel. I took the wheel to my job’s shipping scale. It came in at 33..
that seems totally correct, 20” tires usually come in at 26-29lbs so thats pretty bang on. The wheels are only light weight compared to the all season version. Neither are light weight at all.
If true, 24 lbs is a genuine lighter weight wheel vs the 30 the math was giving. Whoever was saying 60 lbs for wheel/tire needs to get a new scale!
Think the actual wheel combo is 61lbs wheels a scale, tire on factory spec.. Magazines Car Scoops & Car Buzz have the wrong weight for the wheel. Wheels are 33lbs. Tires P-Zero 28lbs If they had PS4S the weight would be 58lbs.
They are within any intended use weight limit & should stand up to street usage with potholes tar strips etc. Stuff you don't need to worry about with light weight track wheels. Anyone know if the optional wheels are forged?
Forged lightweight wheels in 19"/20" weigh 21.9lbs / 22.7lbs tires 25lbs/27lbx on a more track day focused car. Worth getting tire/wheel insurance on these up north.
Last edited by BEAR-AvHistory; 01-26-2022 at 11:02 AM.
07-03-2021 | 06:29 PM
Type S wheels
Rotational inertia of rotational mass is where lighter wheels make a large difference not only in acceleration but braking as well cause they act like flyweights and the larger the radius and distance of radius to the rotational mass moment the great it affects. That's why it's so easy to spin a 30 lb driveshaft vs a 30lb wheel/tire.
