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Fork Rake question....help(7 posts)

Fork Rake question....help853
Jan 26, 2004 3:50 PM
I just bought a frame without a fork and could get a good deal on a fork from a friend.
I bought a Cannondale wich uses 43cm rake and my friend is selling me a Columbus Carve fork that is 45cm rake.

How would this affect the ride/handaling of my cannondale?
I mainly do Crits, if that helps.

Thanks,
quicker steering...C-40
Jan 26, 2004 4:12 PM
The additional rake will make the steering slightly quicker, but not a lot.

Another thing to check, that most people ignore, is the length of the fork from the center of the axle to the top of the crown race. All brands are not the same. The range is about 365-374mm. The incorrect length could change the head tube angle by nearly .5 degree. Can't tell you what length C'dale uses.
43cm rake??cyclopathic
Jan 27, 2004 5:47 AM
you mean 43mm?

Btw Cdale Slice forks have 45mm rake, so you should be o'k. In general 2mm shouldn't effect steering that much, using diff tires may have similar effect on trail.
Are you sure?853
Jan 27, 2004 10:22 AM
There geometry chart for a Caad 5 says 4.3 rake.

http://www.cannondale.com/bikes/03/geo-20.html

It shows the Caad7 as having 4.5 rake. And the same frame geometry so maybe it really doesn't matter, I just wanted to know what it would do to handaling.

http://www.cannondale.com/bikes/03/geo-7.html
Are you sure?lurpy
Jan 27, 2004 3:56 PM
I have a caad 4 and a caad 5 and both came with 45mm forks. Both are 63 cm frames.
re: handlingcyclopathic
Jan 27, 2004 8:30 PM
effects of shorter trail: less steering for the same input and less steering resistance at higher speeds. 2mm on 5.6cm trail is about 3.5% diff, and going from 20mm to 25mm tire will give ~2%. If you notice it at all, it will be only for first couple rides.

However, I believe Cdale Silk forks have 45mm rake, so if there's any difference it is due to fork length. Silks are made by Time, they're prob the same length as Equipe 369mm. Don't have any data on Columbus but if they differ at all it will be less then 2-3mm. Don't loose your sleep over it.
re: Fork Rake question....helpChen2
Jan 27, 2004 1:06 PM
I have 2 Ouzo Pro forks, a 43mm and a 40mm, identical except for the rake. I can definitely feel the difference, but it's not a big difference and they both have their advantages. My HTA is pretty steep, 73.8 degrees so I have elected to stay with the 40, giving me more trail.
~Al