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Fork Rake question for techheads(4 posts)

Fork Rake question for techheadsh82crk
Mar 25, 2002 5:26 PM
I'm wanting to take my Edge fork from a GT ZR2000 frame to replace a fork on a frame with a 73 degree HT, and 1.8 FK Rake, FK length 14.8. If the HT is the same does it matter if the fork geometry is different. Also I haven't been able to find out the specs on the GT fork to be able to compare. I've got a frame I'm interested in but don't like the fork, so I'd like to take the fork off my current road bike. Another question is how does a carbon fork ride on a steel frame? Any help would be appreciated.
yes, it does. nmAlexx
Mar 25, 2002 6:28 PM
Well, it does matter.jw25
Mar 27, 2002 9:37 AM
I have an Edge fork, and the claimed rake is 45mm. I don't know if they made different models, though.
I'd say, if the head angle is the same, the fork should ride the same, provided the wheelbase is close.
The Supergo catalog has a nice chart of head angle/fork rake stability, though they only list 35, 40, 45 and 50mm rakes, so you need to guesstimate a 43, which seems to be the standard. Still, it's the only chart of it's kind I've seen, and it's free...
Luckily, though, a 73 degree head angle can use between a 40 and 45mm rake pretty easily. The 40 will be "more stable", the 45 quicker steering.
I assume the 1.8 fork rake is in inches; that gives about 45mm, so chances are the Edge fork will work fine.
Can't help with the steel frame issue, as I've only ridden aluminum. Going from an aluminum fork to carbon definitely smoothed out the ride, so chances are a steel frame with CF fork will be even comfier.
Hope this helped.
Thanks for the inputh82crk
Mar 27, 2002 5:20 PM
Just in case you wanted to know the frame--a Surly road frame