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Old 01-10-11, 01:23 PM   #1
HerrFaust
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Rigid fork for Performance Al MTB Frame

I'm building-up an 18" Performance Aluminum MTB Frame that I got on clearance with spare parts. The one thing I need is a rigid fork. I think that I need a 100 mm suspension-corrected fork (threadless), w/ 45mm rake, but Performance "live help" is DOA. Has anyone else done this project, and have insight? I also have a threaded headset, so if anyone has threaded dimensions, that would be awesome.
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Old 01-10-11, 02:04 PM   #2
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For a new build bite the bullet and save the threaded headset for some other repair. The cost of a threadless headset would be little enough and it opens up the options for forks to a huge degree. Otherwise you'll search for a long time to get a fork that is threaded to the length you need that also has the correct suspension correction. It would be like finding a needle in a haystack.

Find a rigid fork that is the right length. I wouldn't worry about the rake since they are what they are and they all have "enough" to make do. I've stuck this or that fork on my bikes for years and only worry about the length and the results were that they all rode just fine, The worst was only a hair nervous when riding hands off but was still well stable with hands on the bars.

The frame looks seriously old school from the top tube angle in the pictures so I'd suggest that you're looking for more like a 65 to maybe 80mm max correction amount. But since pictures can be highly deceiving I'd suggest that you want to see a geometry chart for the frame and compare it to other bikes. Or call them and get a recomendation for the best fork length.
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Old 01-10-11, 03:08 PM   #3
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Thank you, it sounds like the $10 for a threadless headset will be worth the saved headaches. Performance didn't really help me when I asked, but perhaps I'll try to get a different Customer Service Rep.
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Old 01-10-11, 03:14 PM   #4
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100mm? Axle to crown race for a sus Corrected MTB fork is more like 17" ... 435mm

go to your LBS they can get a QBP Surly Fork.. or something.
Rake [ofset] is not a consumer choice unless you make a custom order

Bring the frame, they may be able to judge the needed fork by measuring .

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Old 01-10-11, 09:09 PM   #5
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I built up my Performance MTB frame up with a Surly 1 x 1 fork and have been quite happy with it.
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Old 01-10-11, 10:35 PM   #6
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I built up my Performance MTB frame up with a Surly 1 x 1 fork and have been quite happy with it.
.

Thanks. Did you use the curved, or the straight blade model?
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Old 01-11-11, 11:23 AM   #7
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Thanks, all. And yes, I transcribed the hub spacing instead of axle to crown race. Duh. I'm leaning towards Surly, b/c I like the cut of their jib.
Hold my beer, and watch this...
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Old 01-11-11, 07:29 PM   #8
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Just got back from work and dinner with the family using that bike to run around. It's set up with Nokian Extremes so was equipped for the 6+ inches of snow on the trail (I was planning on it being plowed). The bike handles pretty well even though the conditions caused both the front and back end to slide around occasionally. Even after the tough commute I still had to go out to the garage to check the fork and it is the curved version. That being said, the a to c difference is only 20mm (less than an inch) so you probably could use either fork with satisfactory results.
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Old 01-11-11, 11:24 PM   #9
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Thanks, all. And yes, I transcribed the hub spacing instead of axle to crown race. Duh....
I took it to mean that you wanted a fork that was corrected to match a suspension fork with 100mm of travel. See what your "blond" moment almost got us into?
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