Custom rims are better for performance?

[NjLowrider]

So in the description for custom rims it says they are lighter and add performance gains?

Does anyone know this to be true? Would be logical but they dont alter vehicle weight? Anyone wanna test?

 

[Eric W]

Nope, rims are only cosmetic.

 

[stormbringer]

Shame they dont have tyre, rims upgrades. Wider tyres should be one of the most basic of car tuning variables.

Lighter weight rims will maximize engine torque, as they will take less power from the engine to turn. And they make the suspension more efficient.
Dont think gt5 accounts for these benefits.

 

[CodeRedR51]

As they sit, they have no impact on performance.

What I do when I put wheels on a car, is I also purchase the Window Weight modification which drops 10kg I believe from the car. That would be roughly 5 pounds of weight savings per wheel, which is about normal. Try giving that a shot.

 

[nyyellowtaxi]

Looks can be deceiving.

 

[Smuttysy]

Same thing with the replacement of the heavy prop shaft with a carbon fibre one. Why this hasn't got weight implications in the game is beyond me.

 

[edawg456]

Looks can be deceiving.

Pretty much

 

[RageVSFury]

So in the description for custom rims it says they are lighter and add performance gains?

Does anyone know this to be true? Would be logical but they dont alter vehicle weight? Anyone wanna test?

In GT5,custom rims do nothing in terms of performance gains,but in real life they have a slight impact on the vehicles' performance due to a lighter total unsprung mass.

 

[crcn11]

Same thing with the replacement of the heavy prop shaft with a carbon fibre one. Why this hasn't got weight implications in the game is beyond me.

It would be nice to see a more accurate weight system yes. But to be fair the lightweight shaft's main purpose is for engine performance, not dietary aims.

 

[watermelon punch]

I've never seen anything about the rims doing anything for car performance... I think if it did, someone here would've surely figured that out. I think it's just plain cosmetic.

Shame they dont have tyre, rims upgrades. Wider tyres should be one of the most basic of car tuning variables.

Agreed! There's lots of cars that suffer from nothing more than just having skinny tires, making them non-competitive with other cars of their own class/type.

 

[NjLowrider]

I've never seen anything about the rims doing anything for car performance... I think if it did, someone here would've surely figured that out. I think it's just plain cosmetic.

Agreed! There's lots of cars that suffer from nothing more than just having skinny tires, making them non-competitive with other cars of their own class/type.

Read the description for the custom wheels!

 

[watermelon punch]

I've never seen anything about the rims doing anything for car performance... I think if it did, someone here would've surely figured that out. I think it's just plain cosmetic.

Read the description for the custom wheels!

Sorry, I should have worded that better.
When I said "I've never seen anything about the rims doing anything for car performance." I meant, I've never seen anything here on the forum. And I think if they did anything for performance, someone on this forum would've figured it out by now, and posted about it. (Likely in minute detail, intricately describing the benefit to performance, with the inclusion of Youtube videos as visual aids. )

 

[phil_75]

Its must be placebo effect because I'm positive it handles slightly better!???

 

[watermelon punch]

Its must be placebo effect because I'm positive it handles slightly better!???

That reminds me - there was a thread here the other day I saw where people admitted that they liked driving their "favourite" car best, even if they had other cars that were identical.

 

[king4951]

As they sit, they have no impact on performance.
Window Weight modification which drops 10kg I believe from the car.

Window weight reduction drops 5kg, Carbon fibre bonnet drops 10kgs.

 

[CodeRedR51]

Window weight reduction drops 5kg, Carbon fibre bonnet drops 10kgs.

Eh, still a good substitute for weight loss when buying new wheels.

 

[peter_vod69]

Eh, still a good substitute for weight loss when buying new wheels.

New wheels (or rims, if you just intend on replacing the outside bit) don't always save weight, when you consider cars like the Mitsubishi Evolutions and some of the Nismo Skylines already come with lightweight wheels (Enkei, RAYS etc) as standard.

 

[stormbringer]

Eh, still a good substitute for weight loss when buying new wheels.

Light weight wheels dont contribute to car weight when talking about weight power ratios. They are mostly just beneficial to the suspension as they allow the suspension to react more efficiently to bumps and variations. Lower unsprung wheel mass.

Vs higher weight rims, which will logically produce more upwards force when reacting to a bump.

 

[SjefGielen]

Weight reduction in wheels have a different effect on the car than weight reduction of the windows or other body parts. I don't know the exact technical terms, have to look it up somewhere. 5 pounds weight reduction of the wheels have more effect on the power distribution/grip/handling than taking 20 pounds of window weight off.
I don't know if this is actually simulated in GT5, when you change your weight in the tuning shop a pop-up appears on exit that the car specs are recalculated, when you change your rims that pop-up isn't there, so it looks like it doesn't change anything.

 

[GT5FREAK500]

Lighter wheels actually mean a higher amount of HP at the wheels, and heavy wheels mean a lower amount of HP at the wheels. Unfortunately wheels don't effect HP in GT5

See here for proof
http://www.luxury4play.com/lamborgh...ects-wheel-tire-weights-wheel-horsepower.html

 

[djinline]

Window weight reduction drops 10kg, Carbon fibre bonnet drops 5kgs.

Fixed.

 

[shirakawaa]

Lighter wheels actually mean a higher amount of HP at the wheels, and heavy wheels mean a lower amount of HP at the wheels. Unfortunately wheels don't effect HP in GT5

See here for proof
http://www.luxury4play.com/lamborgh...ects-wheel-tire-weights-wheel-horsepower.html

And this is why inertial dynos are worthless.
Lighter wheels don't increase hp, exactly as removing weight from your car doesn't.

 

[SjefGielen]

That's true, lighter wheels don't increase the amount of hp, however, they increase the amount of hp being transfered and therefor used effectively, so it is a performance gain.

 

[shirakawaa]

No, they don't increase the amount of hp being transferred. Transferred power remains the same too. That power appears to increase is an artifact of that type of dynamometer which doesn't normally take into account differences in wheel/drivetrain inertia between one run and another. Ideally, the operator should input different drivetrain inertia values after changing wheels (or the flywheel) but that is seldom done for either incompetence or lack of data.

Hence, the myth that lighter wheels increase wheel hp.

This is the same situation that there's with "software dynamometers" (not done on rollers, but on open roads, usually via OBD) where you have to input, among other data, the correct car weight. If you remove weight from your car without updating the car weight in the software, the output will apparently show an increase of wheel power. Such software typically works with inertia-based algorithms too, by the way.

 

[stormbringer]

No, they don't increase the amount of hp being transferred. Transferred power remains the same too. That power appears to increase is an artifact of that type of dynamometer which doesn't normally take into account differences in wheel/drivetrain inertia between one run and another. Ideally, the operator should input different drivetrain inertia values after changing wheels (or the flywheel) but that is seldom done for either incompetence or lack of data.

Hence, the myth that lighter wheels increase wheel hp.

This is the same situation that there's with "software dynamometers" (not done on rollers, but on open roads, usually via OBD) where you have to input, among other data, the correct car weight. If you remove weight from your car without updating the car weight in the software, the output will apparently show an increase of wheel power. Such software typically works with inertia-based algorithms too, by the way.

Lighter wheels dont increase or decrease hp, they dont produce power.

Lighter wheels are slightly easier for the engine to turn, as they have lower mass. This allows for more efficient TORQUE transfer. However this is a trivial variable compared to tire material/grip and size.

The major benefit is to the suspension. (as mentioned before)

 

[CodeRedR51]

Weight reduction in wheels have a different effect on the car than weight reduction of the windows or other body parts. I don't know the exact technical terms, have to look it up somewhere. 5 pounds weight reduction of the wheels have more effect on the power distribution/grip/handling than taking 20 pounds of window weight off.
I don't know if this is actually simulated in GT5, when you change your weight in the tuning shop a pop-up appears on exit that the car specs are recalculated, when you change your rims that pop-up isn't there, so it looks like it doesn't change anything.

I think in the game it just recalculates the car's overall weight. So it doesn't matter if it's windows or wheels, weight reduction is weight reduction. So, if anyone wants to add "lightweight" wheels to their car, just buy the window weight reduction along with your choice of wheels and call it a day.

 

[genius73]

2.2 lbs/kg