Bitex raf10/RAR9 hubs bearings run rough

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JoO
Posts: 48
Joined: Thu May 04, 2017 7:30 am

by JoO

I just bought 2 hub sets Bitex RAF10/RAR9 for building new wheels with velocity Quill rims.

I received the hubs today. When I turn the axis by hand there is a lot of resistance.
When I hold the centre of the hub in one hand and I turn the axis with the other hand the the pawls in the freehub start to click.

I guess this is not normal. Is there some sort of adjustment that can be done on these hubs?
Are there some known issues with these hubs?
Should I send them back?
Is there something else I could try?

by Weenie


Ltyarbro42
Posts: 88
Joined: Wed Aug 10, 2016 6:05 pm

by Ltyarbro42

This may not always be the case, but the two sets of Bitex I have both felt this way new. After a few hundred miles they are smooth. Though it does crop back up at 4-5k, but with a good service they are normally ok.

JoO
Posts: 48
Joined: Thu May 04, 2017 7:30 am

by JoO

I notice there is a rubber dust cap on the freehub body. could this be a source of drag?

tabl10s
Posts: 223
Joined: Wed Aug 23, 2017 5:40 am

by tabl10s

Bought Selle Italia c59 today, Meilenstein Clincher's last week, Lizard Skin tape, ordered Carbon-Ti X-Carbo rings, Rotor Uno cassette, Cane Creek El Diablo calipers.
2016 Orbea Orca OMR:

15.2lbs(6.89kg).

2013 Wilier Zero.7:

13.08lbs(5.93kg).

2016 Rca:

12.02lbs(5.45kg)

2015 Pinarello F8(build in-process).

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kavitator
Posts: 1160
Joined: Sun Sep 21, 2008 9:07 pm
Location: Slovenia---that forest land

by kavitator

Clean outer rubber dust protector - it must be clean of oil and grease. And tap the endcaps with wood or rubberr hammmer form both sides

JoO
Posts: 48
Joined: Thu May 04, 2017 7:30 am

by JoO

Finally I have built up my wheels. Still had too much friction for my liking.
After carefull examination I guessed the connection between the inner bearing and the freehub was to blame.
I had bought an extra freehub and used an extra washer that was supplied with it.
This washer is 15 mm in diameter about 1 mm thick and less than 1 mm thick.
It only touches the inner race of the bearing in the hub.

Results: the wheel now spins super smoothly.
Perhaps usefull for other wheel builders here (bitex hubs are used by Bikehubstore and others)

by Weenie


alcatraz
Posts: 976
Joined: Mon Aug 29, 2016 11:19 am

by alcatraz

Did you add the washer between freehub/hub or between freehub and dustcap?

There should be a washer pushing against inner races of inner hub bearing and inner freehub bearing. As for the dustcap you might have created a gap and risk contaminating your outer freehub bearing.

It's probably ok though. Nice work fixing the problem.

/a

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