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Member
Registered: 10th Sep 03
User status: Offline
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quote:
Originally posted by jake
whats the point in the chain ring being half way up the frame?
On a mountain bike with rear suspension when you pedal the force from the chain applied onto the rear wheel causes the suspension to bob. To prevent this from happening you can do a number of things, one is to make the chain ring concentric with the area where the suspension pivots, however, where the cranks are on a mountain bike is not an ideal place for a suspension pivot. It needs to be closer to the center of mass of the bike. So to achieve this Brooklyn Machine works, and a few other companys have developed different solutions, this one being you have a left had drive set of cranks, which is attatched to a spindle with sprokets either side of the frame transfering the drive from the cranks from one side of the frame to another through the suspension pivot, thus making the rear suspension full independant to drive forces. It also prevents slack in the chain occuring when the suspension compesses allowing you to use internal gear rear hubs or single speed set ups.
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