Used 52/36 White Industries VBC DOUBLE Chain Ring set for MARG30 cranks

  

These are the VBC (Variable Bolt Circle) chainring "sets". When Doug saw the limitations presented by all the different bolt-circle diameters required to manufacture chainrings, he figured there had to be a better way. , and the VBC chainring system was born. VBC stands for "Variable Bolt Circle" and replaces several different bolt patterns with one simple, slotted outer chainring design that accepts a wide range of our inner VBC chainrings. The outer chainring mounts directly to the crank and serves as the mounting point for the inner chainring.

As bikes, drivetrains, and riding styles have changed in the last decade, the VBC system has found a following among riders tired of being told what gear ratios they should be using. Compatible with White Industries cranks only. Chainrings are made from U. Chainring "sets" come assembled together with White Industries VBC-specific hardware. Outer VBC chainrings cannot be used without an inner chainring! They are not stiff enough by themselves!

Compatible with 9, 10, and 11 speed drivetrains only. 12 speed chains are too narrow and will fall/jam between the rings.

Inner chainring is 36t Outer chainring is 52t.