Quote:
Originally Posted by pete
your quoted rider sag of 1-1/2" X3 = 4-1/2" should be your total
wheel travel if you have got the sags right.... but I don't think
you have as it must have more than 4-1/2" of wheel travel...
not all bumps come up so the wheel needs to be able to travel
down/out for the bumps that drop away..
you need travel in both directions.....
..
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At the risk of offending pete, I think he means that without adequete sack (or sag), the suspension cannot respond to hollows, only bumps. Which means the bike will sail over the hollows, breaking traction because of its in-ability to follow the terrain. Lack of sack is caused by too heavy a rear spring. Even my 1952 AJS 350 had two inches of sack, out of a total of 4 1/2 inches of spring travel, at the wheel, and they worked pretty well. That bike had "Teledraulic" rears, quite big around. Jampots was their nick-name.