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#1
yesterday you said tom.
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Forks
Is there a specific difference in performance between a straight fork, slightly curved fork, or a uni crown fork? Is it just aesthetics? I was just curious about this.
#2
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There is no meaningful difference other than aesthetics. Given the same specs (offset, length), they should handle the same. A curved fork might be a little more forgiving on bumps, a straight fork might be a little stiffer.
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The more your front wheel is directly beneath your handlebar, the twitchier your steering will be, basically making your bike more agile. The further forward your front wheel is, the more stable at higher speeds.
This is of course a very simplified explanation.
This is of course a very simplified explanation.
#4
yesterday you said tom.
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The more your front wheel is directly beneath your handlebar, the twitchier your steering will be, basically making your bike more agile. The further forward your front wheel is, the more stable at higher speeds.
This is of course a very simplified explanation.
This is of course a very simplified explanation.
#5
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#6
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To answer your question, curved forks are slightly more compliant and straight forks are slightly stiffer, but it's hard to tell. Fork material generally has much more of an effect on stiffness.
#8
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theoretically everything said is true, and that unicrown is lighter.
practically, however, it depends on the fork. you can make a unicrown heavier than a lugged, you can make a curved stiffer than a straight. i would venture to say that the higher quality the fork, the more it will adhere to its theoretical advantages... and the cheaper/lower quality the fork, the more it will try to look like a specific aesthetic while disregarding performance characteristics adherence to design.
practically, however, it depends on the fork. you can make a unicrown heavier than a lugged, you can make a curved stiffer than a straight. i would venture to say that the higher quality the fork, the more it will adhere to its theoretical advantages... and the cheaper/lower quality the fork, the more it will try to look like a specific aesthetic while disregarding performance characteristics adherence to design.
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Yes it is counter intuitive, but you do have that completely backwards. mrvile has a decent explaination of that.
Moral of the story: if you want to replace your fork, make sure you get the same offset within +/-5mm. Realistically, most people won't notice a difference of less than 5 mm offset (but those of you who will know who you are).
Also, a fork that gets its rake by curve near the hub is going to be a little more forgiving of bumps than one that is mostly straight.
Moral of the story: if you want to replace your fork, make sure you get the same offset within +/-5mm. Realistically, most people won't notice a difference of less than 5 mm offset (but those of you who will know who you are).
Also, a fork that gets its rake by curve near the hub is going to be a little more forgiving of bumps than one that is mostly straight.
#10
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Just me, but it's aesthetics. Straight forks have the rake angle designed into the point where the bottom of the head tube of the frame and fork are. A curved fork is straight coming out of the bottom of a head tube of the frame and the rake is created with the curvature. The angle of a straight fork and the curve of the curved fork can effectively create the same wheel base.
A longer wheelbase is more stable at higher speeds, so flipping the fork backwards like that decreases stability because the wheelbase of the bike is shorter. And for frame geometry and head tube angle, just research that, track bikes have varying angles that may be 74*, but for the most part, there are track frames all over the place that are 72-74*, that's more dependent upon frame size. A shorter wheelbase improves steering, steering = turning, and a vehicle/bike with a shorter wheelbase has a shorter turning distance. It only makes sense, a unicycle has effectively a zero wheelbase, it's comparatively unstable and twitchy to steer and ride at higher speed in comparison to bikes with longer wheelbases. So many other factors effect the responsiveness of a bike, even tire pressure. A bicycles frame geometry, material composition is a complete system that combined with the forces of nature determine a bike's handling manners. In that regard, I couldn't say which fork is better.
Road Bike:
https://www.fujibikes.com/bike/details/altamira_ltd
Track Bikes:
https://www.fujibikes.com/bike/detail...sic_track_life
https://www.fujibikes.com/bike/details/declaration
https://www.fujibikes.com/bike/details/feather
Wheelbase & Stability:
https://www.dclxvi.org/chunk/tech/trail/
A longer wheelbase is more stable at higher speeds, so flipping the fork backwards like that decreases stability because the wheelbase of the bike is shorter. And for frame geometry and head tube angle, just research that, track bikes have varying angles that may be 74*, but for the most part, there are track frames all over the place that are 72-74*, that's more dependent upon frame size. A shorter wheelbase improves steering, steering = turning, and a vehicle/bike with a shorter wheelbase has a shorter turning distance. It only makes sense, a unicycle has effectively a zero wheelbase, it's comparatively unstable and twitchy to steer and ride at higher speed in comparison to bikes with longer wheelbases. So many other factors effect the responsiveness of a bike, even tire pressure. A bicycles frame geometry, material composition is a complete system that combined with the forces of nature determine a bike's handling manners. In that regard, I couldn't say which fork is better.
Road Bike:
https://www.fujibikes.com/bike/details/altamira_ltd
Track Bikes:
https://www.fujibikes.com/bike/detail...sic_track_life
https://www.fujibikes.com/bike/details/declaration
https://www.fujibikes.com/bike/details/feather
Wheelbase & Stability:
https://www.dclxvi.org/chunk/tech/trail/
#11
poppawheelie
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I would argue that more rake is more forgiving for bumps. Hence hetchins curvy stay design.
#12
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And it's also nice to have rear shock absorber(s) too.
Last edited by fuji86; 10-10-10 at 08:33 AM.
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