Seven Cycles - Chain Stays
1” and 7/8” Chain Stays
One of the great things about building a custom frame with Seven Cycles is the ability to control the tubing on each part of the frame. For example, the drivetrain should be stiffer while maintaining the comfort of the front triangle.
Most riders prefer standard 7/8" diameter chainstays. This is a tube that strikes a good balance between lightness and power transfer. Since the tire clearance is wider than the 1 inch diameter stay, the rear center can be shortened accordingly.
The 1-inch diameter seatstays, on the other hand, are elements the Seven needs to build a stiffer drivetrain. The goal is to transfer the energy generated by the rider to the rear hub as perfect propulsion. While increasing the outer diameter and reducing the wall thickness to keep the weight down, the 1-inch seat stay improves both bending rigidity and torsional rigidity by more than 50% compared to the 7/8-inch seat stay. In the XX grade frame, this is butted to achieve further weight reduction.
You won't find a stiffer drivetrain on the handmade bike market. And when you combine those 1" chainstays with fastback dropouts and 12mm thru axles, you're pushing drivetrain efficiency to the limit.
Dropped Chain Stay
Chopped Chain Stay