ShelBroCo Quadratech

Introducing ShelBroCo QuadraTech Chainrings and sleeve nuts.

Throw away those obsolete chainrings! The unbearably vexing problem of sleeve-nut rotation has bedeviled generations of bicycle mechanics. Who else would you expect to come up with a solution but ShelBroCo?

ShelBroCo Quadratech System

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