Effect of altering rear shock angle.

[Erskine]

I have moved the top mounting point of my rear shocks forwards and downwards, basically jacking up the back and laying down the shocks . Nothing radical though.
I chose the mounting point by drawing an arc up from the bottom mount with the swinging arm pivot point as the center. This has given a 2" lift at the rear.
I though that this would have also had the effect of softening the springs but it actually feels like it's stiffer.
Have I misunderstood the science?
???

 

[Rocan]

depends where you put the mounts. with them more horizontal, they would compress less for each inch of swingarm travel. if im not mistaken, changing shock angle has more of an effect on the rate at which the spring compresses as the swingarm travel increases more so then the overall "strength" of the spring.

also, 2" lift is very drastic, unless if you lifted the front by an inch also (in order to increase maximum turn angle). if you only did it to the rear, depending on the bike, you may find that the bike is far too twitchy.

 

[Erskine]

depends where you put the mounts. with them more horizontal, they would compress less for each inch of swingarm travel. if im not mistaken, changing shock angle has more of an effect on the rate at which the spring compresses as the swingarm travel increases more so then the overall "strength" of the spring.

also, 2" lift is very drastic, unless if you lifted the front by an inch also (in order to increase maximum turn angle). if you only did it to the rear, depending on the bike, you may find that the bike is far too twitchy.

Yeah, that kinda makes sense, I need to use it a bit longer to feel what's going on.

The front has come up 1 1/2" and the line of the frame is parallel to the ground. Cruising speed is 30 mph so with the slight increase in the head angle I'm not anticipating any tank slappers!

 

[rockcitycafe]

stiction.