I have been a big fan of the wide range double, i.e. 18-20 tooth jump between rings, for a long time. Once a staple in the touring bike world these faded into the background with the advent of the MTB triples. By moving to the double you shave a little weight, get rid of most redundant gear ratios and still retain acceptable shifting. For most Rambler builds I recommend a 46/28 ring combination.
The VBC, variable bolt circle, crank set is both an elegant and durable addition to your road bike. The crank set is designed as a traditional double ring crank set, however, it can also be paired with one of our single speed chain rings and be set up as a single. The outer ring is innovative in design with a splined ring interfacing to the crank set. Engineered into the ring design is an elongated five window design that replaces the traditional chain ring bolt circle. The windows are ingeniously unique and versatile allowing the inner ring to self center without being confined to a specific bolt circle.
Designed with a low Q factor, 150mm when paired with a 113mm bottom bracket, the low Q Factor allows the arms to sit close to the chain stays effectively giving one more direct power transfer into each pedal stroke. The chain rings are machined out of 7075, black hard anodized, outer rings are ramped adn pinned for maximum shifting efficiency. Crank arms are available in lengths of 165, 170, 175 and 180. Feel free to ask if you are not certain of the best length for your build. While claimed to work with 10speed indexed shifting, I have found that these perform best with drive trains of 9spd or less.
Made in the USA, California to be precise.
Each crankset is ordered on a custom basis, turnaround is generally under a week. Be sure to include the ring tooth counts you would like and the crank arm length in the comments section of your order.