FSA Threaded Headset with only one set of bearings?
08-13-14 | 09:09 PM
#1
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From: Victoria, BC
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FSA Threaded Headset with only one set of bearings?
I can't find any other example of this, but it seems to me that my headset only has bearings for the upper race. I can't find any other example of this online. The headset is a FSA Duron. I'm curious to know why I can't find another example of this, or what this history of this type of headset is.
08-13-14 | 09:34 PM
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From: New Rochelle, NY
Bikes: too many bikes from 1967 10s (5x2)Frejus to a Sumitomo Ti/Chorus aluminum 10s (10x2), plus one non-susp mtn bike I use as my commuter
I suspect you're missing something, either an actual part, or more likely not recognizing one that's there.
Looking at the lower photo, it appears that there's a movable race, which is probably part of a pressed in, or integrated headset bearing. Stick a finger in and see if it turns, and feels like there may be balls behind it. If so, that's the bearing.
In any case, with these and similar designs, the conical parts on the crowns are only centering cones, which engage and licate the integrated baring race.
Looking at the lower photo, it appears that there's a movable race, which is probably part of a pressed in, or integrated headset bearing. Stick a finger in and see if it turns, and feels like there may be balls behind it. If so, that's the bearing.
In any case, with these and similar designs, the conical parts on the crowns are only centering cones, which engage and licate the integrated baring race.
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FB
Chain-L site
An ounce of diagnosis is worth a pound of cure.
Just because I'm tired of arguing, doesn't mean you're right.
“One accurate measurement is worth a thousand expert opinions” - Adm Grace Murray Hopper - USN
WARNING, I'm from New York. Thin skinned people should maintain safe distance.
08-13-14 | 10:14 PM
#3
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Right, apparently the lower bearings are needle bearings. FSA Duron Threaded Road Racing Bicycle Headset Part Silver 26 4mm 100g Italian | eBay
08-13-14 | 11:06 PM
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From: New Rochelle, NY
Bikes: too many bikes from 1967 10s (5x2)Frejus to a Sumitomo Ti/Chorus aluminum 10s (10x2), plus one non-susp mtn bike I use as my commuter
Given that I don't see any rust, I'd just clean and grease them and ride another year.
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An ounce of diagnosis is worth a pound of cure.
Just because I'm tired of arguing, doesn't mean you're right.
“One accurate measurement is worth a thousand expert opinions” - Adm Grace Murray Hopper - USN
WARNING, I'm from New York. Thin skinned people should maintain safe distance.
FB
Chain-L site
An ounce of diagnosis is worth a pound of cure.
Just because I'm tired of arguing, doesn't mean you're right.
“One accurate measurement is worth a thousand expert opinions” - Adm Grace Murray Hopper - USN
WARNING, I'm from New York. Thin skinned people should maintain safe distance.
08-14-14 | 07:23 PM
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Bikes: '96 Litespeed Catalyst, '05 Litespeed Firenze, '06 Litespeed Tuscany, '20 Surly Midnight Special, All are 3x10. It is hilly around here!
Your first (leftmost) photo shows the cartridge bearing still in the race. "TH Industries" is the bearing maker and, incidentally, FSA parent company.
