I just gotta gush
09-08-21, 05:42 PM
#26
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09-13-21, 05:54 AM
#27
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Gotta agree about downhill coasting being effectively unrelated to a change in bearing friction due to servicing.
Even removing bearing seals and replacing all grease with oil only appears to reduce bearing friction by between 0.03 and 0.06 watts per bearing. I seriously doubt that normal service (e.g., cleaning/regreasing/readjusting) would save any more than that - and probably far less if any if grease were used as is the norm.
https://www.hambini.com/ceramic-bear...ring-analysis/
That means you'd save a maximum of 0.36 watts (some wheelsets have 6 bearings) - and probably far less - by performing a routine service and adjustment of wheel bearings. I doubt that's going to make a noticeable difference in downhill coasting.
Even removing bearing seals and replacing all grease with oil only appears to reduce bearing friction by between 0.03 and 0.06 watts per bearing. I seriously doubt that normal service (e.g., cleaning/regreasing/readjusting) would save any more than that - and probably far less if any if grease were used as is the norm.
https://www.hambini.com/ceramic-bear...ring-analysis/
That means you'd save a maximum of 0.36 watts (some wheelsets have 6 bearings) - and probably far less - by performing a routine service and adjustment of wheel bearings. I doubt that's going to make a noticeable difference in downhill coasting.
Last edited by Hondo6; 09-13-21 at 05:56 AM. Reason: Correct error in wording.
09-13-21, 06:33 AM
#29
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I remember on this hilly triathlon, the difference between downhill coasting speed between me (on a road bike) and the guys on tri bikes with disc wheels who weigh the same and are of same height as me was 79.5km/hr versus 88.5 - 89.5 km/hr (must have been fun on aerobars).
But yeah, that feeling when everything is working just quietly and perfectly, that's pretty awesome.
Last edited by Branko D; 09-13-21 at 06:55 AM.
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