The Street > The Bike Shop
On the subject of steering geometry
G:
Everything else CANT be the same.
74 and a 32mm trail will create a 15mm or so longer wheelbase, the front wheel will be further out front. If you use a shorter toptube frame to compensate, then the bars will be furtherback, if you move the bars forward to compensate then the steering axis is behind... etc etc..
In terms of TRAIL yes, they will be close and feel similar, but when you "feel" the steering, you feel the stability due to trail AND the stability due to your weight pushing down, and the more relaxed angle and longer rake will definitely feel more stable because of it... more here:-
http://www.gsportbmx.com/2004/05/steering-geometry/
:)
G.
LeonLikesToRock:
I had a frame 75.5 head tube angle. I had 27mm forks and it felt rubbish to me, so I swapped them out to an old set of forks with 35mm rake. When everything was dead straight it felt a little bit different to before but as soon as you turned it felt twitchy as fuck again. It did not really feel like a slacker head tube angle at all.
Prodigal Son:
I was having an argument the other night after the skatepark turned out their lights were the dude was saying the rake on forks was different because the legs were welded at varying angles from the steer tube. I thought it was preposterous not being 180° on all forks. Affirmation of this would make me feel better.
Narcoleptic Insomniac:
Nonsense.
BonerhasBent:
From what I understand(which isn't much), a bike with low trail, will handle well at low speeds, but will be unstable at high speed. I believe a lot of this has to do with the type of bike and the riding you are doing, along with the tire size. A little off subject but most Randonneur bikes use low-trail. This is because the bike is loaded with a front bag. When the weight from the bag is put directly over the axle, or just behind it, it make the handling of the bike far better than a high trail or mid trail bike.
G's write up is spot on. The variable are so great, manufacturing tolerances, fork offset, tire size, stem length all play a factor.
I have no idea what a BMX bike will use for trail. I've never actually looked into it.
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