Down Sizing Wheels

[monstar]

The offset for Bathrust wheels are:
19x8.5 +35
19x9.5 +39
No problem with the rear wheels.

The name conjures up heavier wheels than stock to me

 

[dgp]

I have weighed the forged VFI Redline wheels, they were 12kg.

 

[monstar]

I have weighed the forged VFI Redline wheels, they were 12kg.

just to be clear:
Orig wheel weight = Kg
VFI Forged weight = kg
TSW Bathrust = kg?

 

[KT11H]

The HF20" weights 27kg and Bathrust 19" weights slightly less than 22lbs (10kg) Didn't know VF1 Redline wheels are forged, I shall have a look online if the new wheels don't fit.

 

[daz_au]

I have weighed the forged VFI Redline wheels, they were 12kg.

Was that the 8.5" front or 9" rear ? I have a set brand new in boxes here somewhere for a rainy day, I could probably accurately weigh both !

Actually here is a thread from the Chevy SS forums, some people quoting 10ish for the front :

http://www.ssforums.com/forum/wheels-tires-suspension/7889-ss-wheels-tire-weight.html

 

[KT11H]

That's why I couldn't understand why Holden uses HF20' on my vf2 redline weights 27 kg...I checked up the chrome Vf redline 19" wheel on JHP website and it weights the same at 27 kg. Imagine having those wheels on the vehicle is equivalent of carrying an extra passenger (60+ kg) at all time. Perhaps Holden has given up fuel efficiency on VF2 V8 models?

 

[dgp]

Sorry guys, I weighed the VE series I wheels, not the VF wheels although I believe the VFI Redline wheels were also forged, they changed to cast wheels when they went to the black rims.
My VEI Redline wheels were 8.5" and weighed 12kg bare.

 

[daz_au]

That's why I couldn't understand why Holden uses HF20' on my vf2 redline weights 27 kg...

I am pretty sure you will find 27kg is with the tyre, especially if they are talking about the forged wheels.

they changed to cast wheels when they went to the black rims.

No the black VF1 wheels were still forged, the VF2 ones look different and are cast in Thailand. These guys and others still have some in both 8.5" and 9" brand new, I bought a complete extra set a while back because they are technically the best wheel put on a Commodore :

https://www.wheelking.com.au/wheel/437570

Here is an article stating these wheels were being flown from the US to meet demand on the Redline at the time and ROH was complaining they lost the contract (photo of Calais not correct, article states they are talking about US made redline wheels) :

http://www.news.com.au/finance/busi...t/news-story/a0a42e3ac7841da1e1524392b381ef21

 

[monstar]

The HF20" weights 27kg and Bathrust 19" weights slightly less than 22lbs (10kg) Didn't know VF1 Redline wheels are forged, I shall have a look online if the new wheels don't fit.

Yes, Alcoa drop-forged, each spoke is like a breaker bar #no-flex
Cast SS-V wheels became so buckled after 300k km that although appeared good nick of course had to disclose that on sale and highest bid was $50 the lot, sad to sell ma ol shoes but yeah they stink. #forgedforever
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[KT11H]

Read this online, can it be true?

..Saving lots of weight per wheel and unsprung weight (weight that is not support by the car's suspension such as the wheels, tyres, brake rotors and brake callipers). Reducing unsprung weight on your car is of the easiest way to improve your car's handling, braking, and acceleration. As general estimate, 1 lb of unsprung weight is equal to 10 lb of static weight (weight that is supported by the vehicle's suspension) And with every 10 lb lost from a car equals added 1 hp, reducing your unsprung weight can have a profound effect on performance...

According to the above, every lb lost in unsprung weight = 1 hp gain? that's - 0.454 kg = +0.75kw roughly speaking, every kilo lost in wheel's weight = 1.5 kw gain in power. True or False?