going from 45mm to 38mm rake
03-11-09 | 08:03 PM
#3
Brake chatter on CX forks
Joined: Aug 2004
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From: Toronto, ON
Bikes: '04 Kona Jake, '05 Kona Stuff, '07 Specialized Langster
It will increase the trail, in the steering geometry, of your bike. Your bike will be more stable, and less twitchy/responsive.
https://sheldonbrown.com/gloss_tp-z.html#trail
https://www.phred.org/~josh/bike/trail.html
https://sheldonbrown.com/gloss_tp-z.html#trail
https://www.phred.org/~josh/bike/trail.html
03-11-09 | 08:57 PM
#5
partly metal, partly real
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From: Philadelphia.
Bikes: Hummer H2
03-11-09 | 09:20 PM
#6
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From: Rohnert Park, CA
Bikes: Pake track, Soma DoubleCross, LeMond Etape, Maruishi RoadAce 303
Because that was the only other non-answered question. The OP asked how much a 45mm-38mm = 7mm change in the rake would affect the geometry. You should be asking the OP why they would ask a question to which they already knew the answer if the question was, in fact, about the fork geometry.
03-11-09 | 09:48 PM
#8
Live without dead time
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From: Toronto
03-11-09 | 10:45 PM
#10
partly metal, partly real
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From: Philadelphia.
Bikes: Hummer H2
Because that was the only other non-answered question. The OP asked how much a 45mm-38mm = 7mm change in the rake would affect the geometry. You should be asking the OP why they would ask a question to which they already knew the answer if the question was, in fact, about the fork geometry.
hell, bringing up stems would've made more sense...
03-11-09 | 11:01 PM
#12
Depending on the fork design, it can slightly change the head tube and seat tube angles, as well as the bottom bracket height. Depends on the axle to crown length and the offset.
The differences are probably negligable though.
The differences are probably negligable though.
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03-12-09 | 01:04 AM
#13
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From: Rohnert Park, CA
Bikes: Pake track, Soma DoubleCross, LeMond Etape, Maruishi RoadAce 303
03-12-09 | 01:05 AM
#14
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From: Rohnert Park, CA
Bikes: Pake track, Soma DoubleCross, LeMond Etape, Maruishi RoadAce 303
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03-12-09 | 06:20 AM
#15
Senior Member
Joined: Aug 2005
Posts: 2,234
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From: ontario
I put a fork on before with about 38mm rake and my only complaint was the mega toe over lap, not that it will affect your normal riding, but if you're pulling up at a stop light and wanna attempt to do any kind of track standing you may find yourself trying to turn your bars and finding your front wheel hitting your foot, im not great at track standing and always find myself turning the bars back and fourth to maintain balance so it always pissed me off. Other than that I loved the handling with the 38 fork!
03-12-09 | 06:30 AM
#16
aka mattio
Joined: May 2005
Posts: 6,586
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Bikes: yes
https://www.anvilbikes.com/images/1064634020.xls
That link will let you calculate your bike's trail.
https://www.urbanvelo.org/issue3/urbanvelo3_p44-45.html
That link will teach you a little bit about trail and different handling characteristics.
I find that a lower-rake fork on a bike that's not meant for it offers really undesirable handling. So, while this doesn't answer your question, I hope it provides some helpful information.
That link will let you calculate your bike's trail.
https://www.urbanvelo.org/issue3/urbanvelo3_p44-45.html
That link will teach you a little bit about trail and different handling characteristics.
I find that a lower-rake fork on a bike that's not meant for it offers really undesirable handling. So, while this doesn't answer your question, I hope it provides some helpful information.
