Headset Scott sub 30

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find_bruce
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Headset Scott sub 30

Postby find_bruce » Tue Jul 03, 2018 5:10 am

My commuter is a 2009 Scott sub 30 & is showing the usual sign of a worn headset, but I'm struggling to figure out what I can buy as a suitable replacement. Best description I have found is "Ritchey OE Logic Zero, semi integrated" I am assuming zero refers to zero stack

Internal diameter is easy - its a 1 1/8" straight steerer.

What else do I need to know to find a suitable headset.

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Re: Headset Scott sub 30

Postby Duck! » Tue Jul 03, 2018 8:56 am

Semi-integrated means it has cups pressed into the frame, then the bearings fitted in the cups. A fully-integrated headset has the bearings directly fitted into head tube's machined cups.
I had a thought, but it got run over as it crossed my mind.

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Re: Headset Scott sub 30

Postby find_bruce » Tue Jul 03, 2018 9:37 am

Duck! wrote:Semi-integrated means it has cups pressed into the frame, then the bearings fitted in the cups. A fully-integrated headset has the bearings directly fitted into head tube's machined cups.

Thanks Duck - can I replace the bearings or do I need a new headset? Either way, how do I figure out what size?

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Re: Headset Scott sub 30

Postby Duck! » Tue Jul 03, 2018 10:13 am

The bearings may be available separately; they're often - but not always - the same as those in an integrated set. If they're not horribly corroded the size and angles may be legible around the outer shell.
I had a thought, but it got run over as it crossed my mind.

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Re: Headset Scott sub 30

Postby find_bruce » Tue Jul 03, 2018 5:18 pm

Well I feel like a bit of a goose (nothing new there) - took the bearings out to see any markings & discovered that they are not sealed bearings at all & that therefore I should have been greasing them - it seems I did well to get 9 years with zero maintenance.

Despite my neglect, they don't seem horribly corroded - are the size & angles likely to be on the outside of the cups if I knock them out ?

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Re: Headset Scott sub 30

Postby Duck! » Tue Jul 03, 2018 6:41 pm

Sounds like it's not only semi-integrated, but also a semi-cartridge type assembly. There won't be any markings on the cups if you knock them out; you'd only find the numbers I referred to earlier on the bearings themselves if they were separate from the cups.
it is almost certain that the head tube bore for the cups is 44mm. Therfore any ZS44 semi-integrated headset can be fitted.
I had a thought, but it got run over as it crossed my mind.

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Re: Headset Scott sub 30

Postby find_bruce » Thu Jul 05, 2018 9:52 am

Duck! wrote:it is almost certain that the head tube bore for the cups is 44mm. Therfore any ZS44 semi-integrated headset can be fitted.
You're a champion thanks Duck - cartridge headset purchased last night, fitted this morning & all is good again

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