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Old 11-30-06, 12:25 AM   #1
TallRider
me have long head tube
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difference in crown design/structure of steel forks - does this matter?

I've got a couple of nice Centurion road frames from the 1980's:The crowns of their forks are significantly different designs, and I'm wondering if there is any functional difference or if it's only aesthetics.
The Comp TA has a very pretty-looking fork crown, with Tange Champion fork blades, whereas the Ironman Expert has Tange Cromoloy fork blades that are just welded to the steerer tube. I assume they're both plenty strong, probably comparable weight, and while the Comp TA's fork has slightly more tire clearance both forks can handle typical 28mm tires. The Comp TA's fork blades are narrower and prettier, and have more width-space for larger tires probably, but the bikes rear end won't take more than a 28mm tire so it's a moot point really.

I'm also curious about how the TA Comp's fork is produced - is it brazed? Forged in one piece? I can't really see any joints.
Here's pictures. First, the TA Comp in red, and then the Ironman Expert in pink.




Last edited by TallRider; 11-21-08 at 10:35 AM.
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Old 11-30-06, 12:28 AM   #2
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The fork on the TA actually has an internal lug for the fork blades. So the steerer slips into the hole in the middle of the crown while the fork-blades slide over the outside. There's a lip at the top that stops the blades and fits flush with them. Once you braze the joint, you can't see the separation between the blades and the crown anymore. These lugs are typically made through investment casting.



The Centurion fork is made that way to reduce manufacturing costs. Functionally, it should be identical.

Last edited by DannoXYZ; 11-30-06 at 12:42 AM.
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Old 11-30-06, 01:53 AM   #3
TallRider
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Thanks Danno. Knowledgeable on so many counts...
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Old 11-30-06, 03:44 AM   #4
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just cos some of you might find it interesting http://www.odysseybmx.com/dailyword/...eererinfo1.jpg
http://www.odysseybmx.com/dailyword/.../steererb2.jpg
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