Calfee Design has developed the best solution for cyclists interested in electric assist. We can elegantly retrofit a state-of-the-art Pedal Assist to almost any bike, including tandems. Also, swapping back and forth to your original setup is quick and easy. Just removing the top tube bag, on/off switch, and replace the powered wheel with your original. The internal wiring stays installed and out of the way. More Information Calfee Design 1-800-965-2171

Even bicycle enthusiasts and industry insiders are surprised to learn that Tetra was invented back in 1987 and only four years later was being ridden by Greg LeMond and his Team Z teammates in the world’s most important cycling event, the Tour de France. Greg wore the leader’s Yellow Jersey aboard our Tetra, then less than five years old. Today, nearly 20 years later, Tetra tubing and bicycle frames have been continually optimized; sharpened by improvements in raw materials, manufacturing…

The Manta RS is a platform that leverages a patented, active suspension system at the rear wheel to enhance traction, power transmission and comfort to increase rider performance.  Like all Calfee frames and components, the Manta is beautifully hand crafted and painted in our workshop in Santa Cruz County. Don't just take our word for it, check out the articles below. Available in Pro (road) and  Adventure (endurance/gravel/cyclocross) Media on the Manta RS Fairwheel Bikes Project Bike (December, 2014) Road Bike…

Even bicycle enthusiasts and industry insiders are surprised to learn that Tetra was invented back in 1987 and only four years later was being ridden by Greg LeMond and his Team Z teammates in the world’s most important cycling event, the Tour de France. Today, nearly 30 years later, Tetra tubing and bicycle frames have been continually optimized; sharpened by improvements in raw materials, manufacturing processes and advantageous frame options. With the Tetra frames, we saturate carbon fabric with epoxy,…

How did we do?  Please read the review of our Dragonfly published in the June 2011 issue of Road Bike Action.  Zap, Editor of Road Bike Action, picked our Dragonfly as Bike of the Year in their January 2012 issue.  On the heels of this honor, they asked us to build the frame module, a Calfee Adventure, for a gravel road project bike; the 10 page feature was published in the October, 2012 issue and the results are in; RBA…

The use of boron fiber has come of age with its use in our high performance bicycle frames. Bicycle weights have dropped from 18 pounds back in the 1980s to 14 pounds or less in 2014. Much of this weight savings comes with the use of carbon fiber composites. As bicycle companies compete in the arms race to make even lighter, stiffer bikes, safety and durability are pushed to the limit. High modulus (66 Msi and greater) carbon fiber is…

Calfee Adventure/Gravel Vision Founded upon the DNA from our road frames, we designed our Adventure platform to be as versatile as you. Available in all of our models and tubesets, we build each frame to accept 700c, 650b, or both. The slackened head-tube allows for confidence on loose gravel roads, but with all the performance features to keep-up on the weekend group ride. Further, if you prefer randonneur or bike-packing Adventures with frame bags, fender or rack mounts, you will…