RPF1 vs PF01 in terms of weight - Mazda3 Forums : The #1 Mazda 3 Forum
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post #1 of 17 (permalink) Old 03-12-2010, 04:44 AM Thread Starter
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RPF1 vs PF01 in terms of weight

I did a little research and found the actual weights on some of the PF01 17" and 18" rims according to tirerack.com

These are all 5X114 bolt pattern

RPF1 PF01

17X7 45mm 14.6 lbs 17X7 48mm 15.8 lbs
17X7.5 48mm 15.2 lbs 17X7.5 45mm 16.6 lbs
17X8 45mm 15.6 lbs 17X8 45mm 17.2 lbs

17X8.5 40 mm 16 lbs 17x8.5 40 mm 18 lbs

18X7.5 38mm 17.4 lbs
18X7.5 48mm 17.6 lbs 18X7.5 45mm 17.6 lbs

18X8 35mm 17.8 lbs 18X8 45mm 18.2 lbs
18X8 40mm 18.6 lbs
18X8 42mm 18.2 lbs

18X8.5 40mm 18.3 lbs 18X8.5 45mm 18.0 lbs
18X8.5 30mm 18.3 lbs 18X8.5 30mm 19.2 lbs
18X8.5 35mm 18.6 lbs

edit: update info (4.29.10)

they said:

"The ENKEI PF01 is designed to be an ultra light-weight wheel and is engineered to exceed the RPF1’s weight benefit, taking Enkei’s light-weight racing wheel line to the next level."

From the data above RPF1 is still the clear winner.. Hopefully enkei will post PF01s actual weight on their website and remove the post "weight in engineering stage"


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post #2 of 17 (permalink) Old 03-12-2010, 04:51 AM
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Re: RPF1 vs PF01 in terms of weight

You can't say the rpf1 is the winner based on those unequal comparisons, the offsets are different on most of those. The few lines where the offsets are similar, so are the weights.

EDIT: wow, except the 17x8, that better be a mistake... there's no way it's going to be 1.5 lbs heavier in the same size and offset... and least I hope not!
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post #3 of 17 (permalink) Old 03-12-2010, 05:01 AM Thread Starter
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Re: RPF1 vs PF01 in terms of weight

I do understand that they have different offsets and it becomes also a factor in weight but the hype that enkei advertised about PF01 that it would be better than RPF1s..

I guess i'm expecting too much out of the PF01s..


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post #4 of 17 (permalink) Old 03-12-2010, 05:02 AM
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Re: RPF1 vs PF01 in terms of weight

Yeah, I agree, so far I'm skeptical too but I'm giving them the benefit of the doubt until there's more info.
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post #5 of 17 (permalink) Old 03-12-2010, 05:06 AM Thread Starter
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Re: RPF1 vs PF01 in terms of weight

[quote author=cali_axela link=topic=168260.msg3565326#msg3565326 date=1268387480]


EDIT: wow, except the 17x8, that better be a mistake... there's no way it's going to be 1.5 lbs heavier in the same size and offset... and least I hope not!
[/quote]

Yes, thats the weight posted if you search Honda civic SI on tirerack.

link: (I hope link works)

http://www.tirerack.com/wheels/resul...amp;sort=Brand


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post #6 of 17 (permalink) Old 03-12-2010, 04:19 PM
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Re: RPF1 vs PF01 in terms of weight

Call Enkei and talk to King. They weighed all the wheels when they arrived from Japan. I was told mine were 17.08 lbs (18x7.5 +45). Didn't have a scale to weigh them myself though.
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post #7 of 17 (permalink) Old 03-12-2010, 08:34 PM
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Re: RPF1 vs PF01 in terms of weight

Saw the weight thing on other forums, too. Honestly, I am a little disappointed as I expected all of them to be lighter but at least .5-1 lb and definitely not heavier.
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post #8 of 17 (permalink) Old 03-14-2010, 04:18 PM
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Re: RPF1 vs PF01 in terms of weight

Simply because the wheels weigh more overall does NOT mean that more power is required to turn them...Unless you know the mass distribution around the wheel, then you don't know the whole story. Said another way, if that mass is more heavily centered on the inside of the wheel radius, then there is less mass on the far edge of the radius, which would result in less effort required to spin the wheel.

Simply think about a lever with an endpoint as the fulcrum. Where you put the mass on that lever is what defines the required energy of movement.

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post #9 of 17 (permalink) Old 03-14-2010, 04:28 PM
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Re: RPF1 vs PF01 in terms of weight

[quote author=phate link=topic=168260.msg3567814#msg3567814 date=1268597926]
Simply because the wheels weigh more overall does NOT mean that more power is required to turn them...Unless you know the mass distribution around the wheel, then you don't know the whole story. Said another way, if that mass is more heavily centered on the inside of the wheel radius, then there is less mass on the far edge of the radius, which would result in less effort required to spin the wheel.

Simply think about a lever with an endpoint as the fulcrum. Where you put the mass on that lever is what defines the required energy of movement.
[/quote]

very true

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post #10 of 17 (permalink) Old 03-14-2010, 11:03 PM Thread Starter
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Re: RPF1 vs PF01 in terms of weight

[quote author=phate link=topic=168260.msg3567814#msg3567814 date=1268597926]
Simply because the wheels weigh more overall does NOT mean that more power is required to turn them...Unless you know the mass distribution around the wheel, then you don't know the whole story. Said another way, if that mass is more heavily centered on the inside of the wheel radius, then there is less mass on the far edge of the radius, which would result in less effort required to spin the wheel.

Simply think about a lever with an endpoint as the fulcrum. Where you put the mass on that lever is what defines the required energy of movement.
[/quote]

true true, the way PF01 is designed, the spokes are spread out compared to the RPF1s so there is a possibility the mass distribution is more on the center. Looking at the design structure of PF01 gives more integrity compared to the design structure of the RPF1s so it is really possible to have lighter mass with the further diameter of the wheels.

Hopefully enkei would justify their statement on the PF01 being better than RPF1 and post the actual weight of these wheels.


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