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PostPosted: Thu Jul 26, 2012 5:15 am 
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Not sure on bikes, but rotating weight on a race car is 6 times more important than non rotating weight. Best lace to save weight in my opinion is the wheels and the cranks. You will definitely feel it.


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Posted: Thu Jul 26, 2012 5:15 am 


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PostPosted: Thu Jul 26, 2012 5:26 am 
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I miss the days when 'scienceiscool' would come in and debunk these threads.

I highly recommend having a search or using 'analytical cycling', this stuff has been covered before.

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PostPosted: Thu Jul 26, 2012 5:30 am 
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Of relevancy is the value of Rotational Inertia discussed in the latest aero-wheel test from Velo News.
See the pdf linked at this thread: viewtopic.php?f=3&t=105402

Or look up VeloNews.com -> Tech -> Wheel/Moment of Inertia

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PostPosted: Thu Jul 26, 2012 11:27 am 
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Location: Slovenia---that forest land
test we do was 4 intervals.
1.1670g
10min recovery
2.1000g low profile carbon tubulars
10min rec
3. clinchers
10min rec
4.1000g tubulars

between hole interval 2 chekpoints

difference was couple seconds each test, puls almost same, test was within 1 h period. no wind and nice summer weather.

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PostPosted: Thu Jul 26, 2012 11:33 am 
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if ride is constant tempo ride there verz little difference betwen 280g rim and 500g rim. it is more how it feels. when come to changes in speed there is differnce. but how much in time actualy must be done some test wiyh longer climb than 7 min. but in rideing- feeling lighter is more lively and easyer to speed up.

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PostPosted: Thu Jul 26, 2012 12:51 pm 
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Tinea Pedis wrote:
I miss the days when 'scienceiscool' would come in and debunk these threads.
If you remember, ScienceIsCool lost his cool.


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PostPosted: Thu Jul 26, 2012 1:45 pm 
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At extreme ends of the spectrum you can notice weight in some circumstances IME ... I used to have a pair of the old Shimano WH-R540 wheels which are 1900g and have a hugely heavy rim weighing around 700g or so each. At speeds of 40kmh+ you could certainly notice they took more effort to stop than Zipp 202s.


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PostPosted: Thu Jul 26, 2012 2:00 pm 
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I own several sets of wheels. My favorites are not the lightest. IMO you need to consider all aspects of the wheel and the intended applacation. Consider a flat TT, weight is less an issue here. Racing crits? Weight counts more but stiffness IMO is more important. So to answer the question " is 200 grams noticeable?" I answer with, depends :beerchug:

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