Two-way - Complex (spring + cellular PU) rear suspension.
Special designed suspension structure, which not only make it more appeal, but also add the comfort and inner performance.
This new type rear suspension for Birdy folding bike, which Imperium Cycle developed about two years, it keeps the stability from the PU/Spring combination and the unique quick-installation from Birdy Folding Bike.
New rear suspension follows frame structure of Birdy, combine both outline dimension of spring to add K-value and special designed resistance from cell type PU, which protect frames and rear fork.
It keeps the two-way damping design, which will fix the return spring force automatically. This contributes by cell type PU part. The holes on PU are an important part to detect the user’s weight.
New type rear suspension will add the comfort, but also add the stability from the rear fork, which makes riders love to use it ride the mountain. The new rear suspension also eliminate the problem that heavy user makes great power lose and add their efficiency.