's Forum Archives - Components

Archive Home >> Components(1 2 3 4 5 6 7 8 9 10 )

Colnago with raked forks?(6 posts)

Colnago with raked forks?Pete03
Jun 30, 2003 5:48 AM

Have recently bought a Colnago dream plus with out forks. Was planning to use my existing forks which are raked not straight. Will this work ok as i have seen that colnago sell only straight forks.

re: Colnago with raked forks?Rusty Coggs
Jun 30, 2003 6:23 AM
Straight forks have rake.It's at the crown rather than the dropouts.No problem if the rakes ae about the sme. Most current frok rakes are in the range of 40-45mm.
43mm rake...C-40
Jun 30, 2003 7:18 AM
Colnago forks have 43mm of rake. Colnago frames have fairly slack head tube angles, that result in more trail than many other brands. A 43-45mm rake would be OK. A 40mm rake might steer a tad too slow.
43mm rake...03Vortex
Jun 30, 2003 9:19 AM
Pleading ignorant here so please educate me. Slacker HT angles on the Colnagos resulting in more "trail." What does that mean??

Jun 30, 2003 9:49 AM
the formula...C-40
Jun 30, 2003 10:34 AM
Chen2 posted a good site with a drawing that depicts trail.

The more trail, the slower the steering and the greater the tendency to stay in a straight line at normal riding speeds.

Trail = (R/tanH)- (rake/sinH). In this equation R is the radius of the tire ( I use 336 for road bikes) and H is the head tube angle. The first half of the equation is the trail without fork rake and the second half is the effect of adding rake to the fork. Notice that all rake reduces trail, so the more rake the less trail and the quicker the steering (for a given H).