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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 03-19-11, 11:58 AM   #1
liberalswine
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Determining Rake in mm from degrees?

Sorry, but I'm a complete noob when it comes to this. But I'm planning on getting a new wound up fork for my marta, however wound up measures in mm. I called Affinity and they told me that the rake size was 43 degrees and when asked what that was in millimeters, the guy responds "I don't know". So that wasn't much help. So now I'm turning on here for advice from you guys. Thanks!
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Old 03-19-11, 12:01 PM   #2
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Rake is measured im mm, not degrees.
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Old 03-19-11, 12:15 PM   #3
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affinity guy is an idiot.
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Old 03-19-11, 12:20 PM   #4
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As Shimagnolo says, rake is the dimensional offset of the fork dropouts from the steering axis. It is always measured in millimeters or inches and is the right angle distance the from the extended steering axis to the center of the dropout.

Read Dave Moulton's blog entry on Trail, fork rake, and a little bit of history.
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Old 03-19-11, 12:31 PM   #5
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Yeah agree'd! I also just looked at affinitys website for specs on the lo pro, and they also have fork rake as 43 degrees as well. I need to find out since I'll be starting my hunt for my wound up
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Old 03-19-11, 01:05 PM   #6
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its 43mm. 43 degrees of rake would be at least 340mm of rake.
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Old 03-19-11, 01:13 PM   #7
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^ agreed. Degrees of anything is probably head angle, and 43 of that would be insane.
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Old 03-19-11, 01:15 PM   #8
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Quote:
Originally Posted by adriano View Post
43 degrees of rake would be at least 340mm of rake.
So, something like this?

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Old 03-19-11, 01:19 PM   #9
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there it is. someone from affinity needs to come forward to prove that they arent all total imbeciles. every size of the lo pro is listed with a head tube angle of "7? degrees" and "55cm" bottom bracket drop.
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Old 03-19-11, 01:35 PM   #10
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All of their spec pages are messed up.
First, there are discrepancies with the letters used in the drawings and the charts below the drawings.
And for a real belly laugh, look at the BB drop specs.
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Old 03-19-11, 01:50 PM   #11
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Okay so "43 degrees" is a discreptancy? Perhaps the guy working at affinity at this very moment is just clueless? He told me to google the "conversion" because he was swamped at work. What gives?
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Old 03-19-11, 02:03 PM   #12
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think about it. 43 degrees is a lot (almost half of a right angle) there's no way that degrees is correct your fork would look like the lowrider above. it's probably 43mm. bring your bike into a LBS. a good one should be able to measure the rake for you if you dont trust your own measurements. what's your head tube angle?
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