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Singlespeed & Fixed Gear "I still feel that variable gears are only for people over forty-five. Isn't it better to triumph by the strength of your muscles than by the artifice of a derailer? We are getting soft...As for me, give me a fixed gear!"-- Henri Desgrange (31 January 1865 - 16 August 1940)

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Old 08-05-07, 10:51 AM   #1
Nakedjim
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Fork rake

I have a pista and want to get a carbon aero fork for it. However I can't seem to find any forks with 28mm rake. If I went with a 40mm would it make that much of a difference? It is also a 1" steerer tube.
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Old 08-05-07, 11:20 AM   #2
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it's not quite as simple as just looking at fork rake.

If the two forks are the same length (axle->crown) then going from 28mm to 40mm rake will decrease your trail by about 10mm. Which will make things a bit less stable.

However, the road fork might be a bit longer than stock pista fork. Putting a longer fork on will effectively slacken the HT angle, thus you'd need the extra rake to give the same trail you had before with the shorter, 28mm rake fork.
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Old 08-05-07, 11:21 AM   #3
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the 28mm is aggressive which is needed for track use. A 40mm would relax the ride and give you more of a road type feel. There was a thread on here earlier this week on carbon forks you should check out that explained the difference the rake makes in handling
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Old 08-05-07, 12:51 PM   #4
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Originally Posted by FERAL View Post
the 28mm is aggressive which is needed for track use. A 40mm would relax the ride and give you more of a road type feel.
This is a common misconception. Adding rake to a fork while keeping fork length constant decreases trail, and consequently makes handling less stable. So as baxtefer was saying you'd want more rake if you were adding a longer fork, in order to keep trail constant and in theory, to keep the handling from becoming more stable.
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Old 08-05-07, 07:45 PM   #5
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Read my fork review.
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