Upgrade for road bike - BB bearings and Rear Pulleys

Discuss light weight issues concerning road bikes & parts.
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kavitator
Posts: 1177
Joined: Sun Sep 21, 2008 9:07 pm
Location: Slovenia---that forest land

by kavitator

What is best worth of money to upgrade with lower friction bearings for bottom bracket and rear pulleys?

Are oversizde pulleys good - or they just make shifting worse?

Kogel bearings?
Cycling ceramic?
KCNC?


thanks

by Weenie


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VTR1000SP2
Posts: 369
Joined: Tue Nov 05, 2013 8:21 pm

by VTR1000SP2

I’ve not heard of OSPW negatively affecting shift performance. I have tried a few options out there and here’s how I rank them:

Pulleys:
Value: tacx ceramic
Performance: OSPW coated
Weight: Kogel NFI

B.B:
Value - Hawk Racing
Performance - couldn’t really tell (Kogel vs CeramicSpeed vs Hawk)



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AJS914
Posts: 2260
Joined: Tue Jan 28, 2014 6:52 pm

by AJS914

None of them are worth it based on a watts/$$ calculation. You are talking about saving 1/2 to 1 watt. An aero road helmet can save you 10 watts.

https://university.trisports.com/2016/1 ... end-a-lot/

sungod
Posts: 1662
Joined: Fri Dec 24, 2010 9:37 pm
Location: it's raining, it must be uk

by sungod

this discusses ospw in some detail https://www.velonews.com/2018/07/bikes- ... you_472956

the say it saves a bit less than 1% power, useful if you do tt, but unless you already optimised a lot of other things probably not the best roi

hambini
Posts: 330
Joined: Tue Nov 15, 2016 8:13 am

by hambini

If you really want to go fast, get bearings without any seals and use a light oil for the lubricant. You'll have to re oil frequently but they will be the fastest.

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VTR1000SP2
Posts: 369
Joined: Tue Nov 05, 2013 8:21 pm

by VTR1000SP2

hambini wrote:If you really want to go fast, get bearings without any seals and use a light oil for the lubricant. You'll have to re oil frequently but they will be the fastest.
Truth



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themidge
Posts: 864
Joined: Fri Jan 13, 2017 4:19 pm
Location: Freeedooom!

by themidge

^ In the olden days (:wink:) they used to do this for TTs (even in grand tours). If pro mechanics did it back in the day, I'd be inclined to trust it.

Edit: what happened to the smilies? :? <----The one above was supposed to be a normal one like this one :wink: Edit again: <-- that one is normal :noidea:

gramsqueen
Posts: 68
Joined: Wed Jun 27, 2018 5:15 am

by gramsqueen

Yup. Still can't find a smoother ride than Dura Ace hubs and Sugino BB with 1/4 inch bearing balls all around. They were so loose and fast

by Weenie


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