March 7, 2010

Collector Bottom Bracket, Rear Cranks & Center Pivot Detail

Pivot point centerline and center line of bottom brackets align. Sprockets that will spin on the collector bottom bracket (the piece with pink paint

on it in this image) will link by chain to the rear crank (the left side of the piece with orange in this image) and front crank (to the left, not shown).

A third sprocket on the collector bottom bracket will link by chain to the rear axle (to the right, not shown).

Alignment of centerlines allows the rear axle to move up and down without changing axle chain tension.