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 Post subject: Zipp Free Hub Drag?
PostPosted: Wed Aug 24, 2011 12:34 pm 
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Joined: Thu Jan 25, 2007 3:56 pm
Posts: 779
Hey y'all,

I've got a new Zipp 900 disc and the free hub has more drag than I'd like (slightly more than my well used 808 rear, I'm curious why they have as much as they do. Do they use a thicker lubricant to keep the Pawl noise down? If this is the case what could I run in there that would give the lowest friction?


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 Post subject: Re: Zipp Free Hub Drag?
PostPosted: Wed Aug 24, 2011 12:46 pm 
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Joined: Wed Feb 09, 2005 4:51 am
Posts: 1855
Usually, its just a stiffer new spring.


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 Post subject: Re: Zipp Free Hub Drag?
PostPosted: Wed Aug 24, 2011 4:00 pm 
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Joined: Wed Aug 23, 2006 9:11 pm
Posts: 2877
Location: People's Republic of Boulder
Mobil1 on the pawls.

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 Post subject: Re: Zipp Free Hub Drag?
PostPosted: Wed Aug 24, 2011 5:07 pm 
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Joined: Thu Jan 25, 2007 3:56 pm
Posts: 779
Do this come with Mobil 1 or similar from the factory or is it something thicker?


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 Post subject: Re: Zipp Free Hub Drag?
PostPosted: Wed Aug 24, 2011 11:51 pm 
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Joined: Sat Nov 20, 2010 6:06 am
Posts: 968
Location: Perth, Western Australia
Zipp recommends Mobil 1, any similar synthetic lube would work. A very light synthetic grease would also work, and shouldn't perceptibly increase drag.
I use Mobil 1, but it does require a bit more frequent maintenance, but it runs smoothly.

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 Post subject: Re: Zipp Free Hub Drag?
PostPosted: Thu Aug 25, 2011 1:17 am 
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Joined: Sat Jun 13, 2009 4:02 am
Posts: 1980
Location: NoVA/DC
current zipps come with greased pawls/ratchet. they used to just oil them, and recommend mobil1. i am under the assumption that their new grease is mobil1 compatible, as their recommendation hasnt changed on the web or in manuals, so thinning it out with oil is a good alternative. another is to just crack the hub open and wipe some of the excess away. not all of it, but they seem to be applying a lot of grease in there.
i'd smear some of the excess onto the axle to help with axle/bearing id fit, and onto the supplementary bearing shields to help with sealing.


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 Post subject: Re: Zipp Free Hub Drag?
PostPosted: Thu Aug 25, 2011 4:18 pm 
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Joined: Mon Dec 28, 2009 8:30 pm
Posts: 5276
Location: Bay Area
Zipp sells a specific freehub body oil now as well. Open it up and CLEAN the pawls and ratchets with mineral spirits/degreaser first and then apply a decently generous amount of the lube. Mixing the two creates a messy sludge since they don't always combine.

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 Post subject: Re: Zipp Free Hub Drag?
PostPosted: Thu Aug 25, 2011 5:50 pm 
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Joined: Thu Jan 25, 2007 3:56 pm
Posts: 779
If I was to run a very low friction engine oil, aside from shorter service intervals what would the downside be? I couldn't find Mobil 1 10w-30 like Zipp recommended so went wandering round the Internet and stumbled across a race race engine oil with very low friction but less wear protection...

What do you think??

P.s great suggestions so far guys I'm just curious about other options.


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 Post subject: Re: Zipp Free Hub Drag?
PostPosted: Thu Aug 25, 2011 5:59 pm 
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Location: Bay Area
Viscosity and weight matter more than that mumbo jumbo 'technology' shit they use to sell more oil.

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 Post subject: Re: Zipp Free Hub Drag?
PostPosted: Thu Aug 25, 2011 6:09 pm 
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Posts: 779
Seeing as there can't be any meaningful temperature in the freehub would a low SAE rated oil be best then?


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 Post subject: Re: Zipp Free Hub Drag?
PostPosted: Thu Aug 25, 2011 6:11 pm 
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Joined: Thu Jan 25, 2007 3:56 pm
Posts: 779
Also just to reiterate, I'm not expecting this to make much difference I'm just not happy with the stock hub and curious what the best solution would be. Not expecting the world here...


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 Post subject: Re: Zipp Free Hub Drag?
PostPosted: Thu Aug 25, 2011 6:13 pm 
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Joined: Mon Dec 28, 2009 8:30 pm
Posts: 5276
Location: Bay Area
Its weird that you have drag, are they the 180 hubs? Mine have been amazing and have been through some terrible conditions.

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 Post subject: Re: Zipp Free Hub Drag?
PostPosted: Thu Aug 25, 2011 6:20 pm 
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Joined: Thu Jan 25, 2007 3:56 pm
Posts: 779
Its a 2011 900 disc which still uses the previous Zipp hub generation I believe. I'll take it apart later and see if it's different from my 2011 808's which where better when they where new, maybe just too much grease in there. I'll have a look later.

Out of interest how would a PTFE dry chain lube work in the freehub?


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 Post subject: Re: Zipp Free Hub Drag?
PostPosted: Fri Aug 26, 2011 2:09 am 
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Joined: Sat Jun 13, 2009 4:02 am
Posts: 1980
Location: NoVA/DC
Ruds wrote:
Out of interest how would a PTFE dry chain lube work in the freehub?


most "dry" lubes have a solvent carrier that is intended to evaporate after application. you dont want that in there.
similarly, i have witnessed someone put a couple drops of triflow on the orange freehub seal and it curled up right away. that's the real issue, seal compatibility.


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 Post subject: Re: Zipp Free Hub Drag?
PostPosted: Sun Aug 28, 2011 2:03 am 
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Joined: Thu Jan 25, 2007 3:56 pm
Posts: 779
Got it apart tonight, quite a lot of thick viscous grease, I removed it and used a lightweight engine oil. Quite a lot better, not as good as Zipp's latest 182 (I'd that the right number??) hubs but much better than before.

Thank you for all the help and suggestions!


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