Originally Posted by
Campag4life
It won't make a big difference but it will reduce trail and contribute to quicker steering.
Trail is often misunderstood...especially in the context of fork rake...or at least easily confused. See pic below. Visualize the difference of increasing the fork rake i.e. moving the axle center forward which reduces the distance at the pavement where the lines you see intersect with the road...which by definition is trail. Less trail = quicker handling. Trail is basically castor...like on a shopping cart wheel or an automobile. When you turn the wheel, you are physically lifting the bike by the lever of trail...and this lever is the self centering ingredient of steering...or resistance to turning is another way to consider it. So if you reduce this lever length, then the front bike wheel will be less resistant to turning aka turn more easily.
So if you believe your handling is a touch on the twitchy side...don't make this change. If you believe your bike handling can tolerate a slightly quicker turn in, you should be OK with increasing fork rake slightly.
HTH.
Nice! I thought I knew what is the effect of trail regarding handling, but it never occurred to me to ask why. Your explanation of lifting the bike with a lever is a totally new concept to me. Thanks so much!
Robert