14 x 7.5 Cromodora 5-Spoke Wheel Weight ( 308 ) | FerrariChat
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14 x 7.5 Cromodora 5-Spoke Wheel Weight ( 308 )

Discussion in '308/328' started by cray54, Apr 12, 2006.

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  1. cray54

    cray54 Karting

    Nov 4, 2005
    184
    Ashfield, MA
    Full Name:
    Christopher Gray
    #1 cray54, Apr 12, 2006
    For anyone who might be interested:

    I weighed my 14 x 7.5 Cromodora 5-Spoke Wheels (w/ valve stem, w/ center caps, w/o tires).

    The average weight found: 14.2 lbs

    -Chris
     
  2. JTranfield

    JTranfield Formula Junior

    Dec 29, 2003
    665
    NYC, London
    Full Name:
    J Tranfield
    #2 JTranfield, Apr 12, 2006
    Is that a lot compaired to other wheels like the aftermarket 16"s? How much extra is the tyre?
     
  3. cray54

    cray54 Karting

    Nov 4, 2005
    184
    Ashfield, MA
    Full Name:
    Christopher Gray
    #3 cray54, Apr 12, 2006
    That is a pretty good (low) weight. The original tires weighed approx. 27 lbs (from other numbers I've found). Newer tires tend to weigh less (Kumho offers 2 different 205x70R14 tires that weigh ~20 lbs each). Tire weights can be found fairly easily on a manufacturers website, or by calling them directly.

    I've been trying to find weight info for many wheels, and have had a hard time... but its coming along. When I get more info compiled, I'll be sure to post it.

    Superformance said their 5-Spoke Repro Wheels weigh:
    16"x7" QV Superformance (aluminum): 9.0 kg (19.8 lbs)
    16"x8" QV Superformance (aluminum): 9.4 kg (20.7 lbs)

    I dont have original 16" wheel data yet.

    I've only been compiling 16" r-compound tire data so far. The average tire weight is 22.4 lbs for 205x55R16 and 23.5 lbs for 225x50R16.

    Watching weight in a wheel / tire combination when looking for a new setup can be more helpful than some think. Saving 5 lbs on a corner saves 20 lbs on the overall weight of the car, reduces unsprung weight by 20lbs, and reduces rotational inertia (by how much varies by weight distribution in the wheel / tire).

    -Chris
     
  4. enjoythemusic

    enjoythemusic F1 World Champ

    Apr 20, 2002
    10,676
    Worldwide
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    Steven
    #4 enjoythemusic, Apr 13, 2006
    100% agree. Rims should weight about 1 lbs per inch (i.e. 16-inch rims should weight 16 lbs). Also agree about keeping the combined rim/tire weight low.
     
  5. Thomasio

    Thomasio Karting

    Feb 27, 2018
    127
    Full Name:
    Thomas Alberti
    #5 Thomasio, May 21, 2018
    I know this is an old thread... I recently acquired a set of 14" x 7.5" Cromodora 5 spoke wheels (1977 build date), and they are 13.2 lbs. Could they be magnesium?
     
  6. BigTex

    BigTex Seven Time F1 World Champ
    Owner Rossa Subscribed

    Dec 6, 2002
    79,321
    Houston, Texas
    Full Name:
    Bubba
    #6 BigTex, May 21, 2018
    All of the early 70s wheels are what is called "high magnesium" content.

    They are an aluminum alloy containing magnesium.
    But, as you see from our corrosion problems if not properly primed, later wheels moved to a different alloy, and they got heavier.

    I have some OEM 16"s, I guess as I mail the luggage I could throw each one on the scale for data!

    Only the racing wheels, and many gearboxes, were pure magnesium (which will burn!!) and if not coated, they are all white dust by now.
    Never meant for longevity, they were going for pure performance of the casting vs. weight
     

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