Smidge204
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Re: Forged Rays Volk Wheels installed - stock wheels are HEA

Sun May 08, 2011 3:49 am

hill wrote:greenleaf - you are partly correct ... but reduction in wheel weight is actually even better than linear. The formula relating to this (on some tire/wheel web sites) is described as an exponential factor.
Linear kinetic energy from wheel's center of mass traveling horizontally: 1/2 * mass * velocity^2
Rotational kinetic energy from wheel spinning: 1/2 * inertia moment * angular velocity^2

Inertia moment is a function of wheel mass and geometry (linked from wikipedia since there's no point in redrawing it)

Image

To translate for non-mathematical types: Reducing mass at a distance 2R from the axis will decrease inertia 4 times more than removing the same amount of mass at distance R. Simply put: Get the mass off the edge of the wheels!

This is an excellent argument for getting low profile tires and decreasing wheel radius as a whole, although that may impact your top speed and throw your speedometer off more than it already might be.

Of course, it's only worth it if you're changing speeds a lot. Under constant speed conditions reducing wheel mass will have the same effect as reducing the mass anywhere else. Not worth as much for highway commuters as it is for city commuters.
=Smidge=

palmermd
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Re: Forged Rays Volk Wheels installed - stock wheels are HEA

Tue Jun 07, 2011 5:59 pm

I may have missed it when quickly reading this thread again. Were you able to transfer the Tire pressure monitoring sensors? I'm about to make a wheel change and I'd like to know what I'll need to be able to transfer them over if it is possible.
Michael

Leaf from 31 March 2011 - Traded 18 April 2018 for Tesla Model 3 Unicorn
Driving electric since 1996


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VorlonZ
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Re: Forged Rays Volk Wheels installed - stock wheels are HEA

Tue Jun 07, 2011 6:45 pm

I was able to transfer the TPMS sensors over to my Enkei RPF1s without any issues.

palmermd
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Re: Forged Rays Volk Wheels installed - stock wheels are HEA

Tue Jun 07, 2011 9:15 pm

Do they just strap onto the inside of the wheel or are their mounting points?
Michael

Leaf from 31 March 2011 - Traded 18 April 2018 for Tesla Model 3 Unicorn
Driving electric since 1996


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Skywagon
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Re: Forged Rays Volk Wheels installed - stock wheels are HEA

Tue Jun 07, 2011 9:51 pm

They bolted into the new wheels just fine... the tire shop swapped them over.

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aqn
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Re: Forged Rays Volk Wheels installed - stock wheels are HEA

Wed Jun 08, 2011 2:57 pm

VorlonZ wrote:I was able to transfer the TPMS sensors over to my Enkei RPF1s without any issues.
Would you mind sharing the specs of your wheels? Did you go with the 16x7 size, not 16x8? Which offset did you go with, 35 or 43? Thanks!
Anna Nguyen

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Skywagon
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Re: Forged Rays Volk Wheels installed - stock wheels are HEA

Wed Jun 08, 2011 2:59 pm

aqn wrote:
VorlonZ wrote:I was able to transfer the TPMS sensors over to my Enkei RPF1s without any issues.
Would you mind sharing the specs of your wheels? Did you go with the 16x7 size, not 16x8? Which offset did you go with, 35 or 43? Thanks!
If you read the offset thread he went with a 16x7 with a 25mm offset. The larger offsets will not clear the brake calipers.

LEAFguy
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Re: Forged Rays Volk Wheels installed - stock wheels are HEA

Wed Jun 08, 2011 8:54 pm

palmermd wrote:Do they just strap onto the inside of the wheel or are their mounting points?
Michael - Nissan's TPMS is mounted on the inboard side of the valve stem. Any tire/wheel shop will be able to tell you whether the wheels that you are considering are "TPMS compliant".

mark13
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Re: Forged Rays Volk Wheels installed - stock wheels are HEA

Fri Jun 10, 2011 3:08 pm

I have found a few wheels that I like on the internet but I do not get any confirmed emails back that the wheels will fit the Leaf..Does this mean a 25 to 40 offset will fit the Leaf ?

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Skywagon
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Re: Forged Rays Volk Wheels installed - stock wheels are HEA

Fri Jun 10, 2011 3:42 pm

mark13 wrote:I have found a few wheels that I like on the internet but I do not get any confirmed emails back that the wheels will fit the Leaf..Does this mean a 25 to 40 offset will fit the Leaf ?
Like I have stated numerous times before (even in this thread) it depends on the wheel and it's spoke design. Most aftermarket wheels will need to be in the 25mm offset range but you will have to test fit one to make sure. The clearance issue is the front brake calipers.

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