The single speed frame is at least as stiff as the steel Condor frame but is more comfortable as it absorbs vibrations better. It's not as stiff as large tubed alu or carbon frames though. Most of the flexibility that I've noticed comes from the lateral stiffness of the rear stays. I'm going to see how the stays on this frame feel when all glued up and may need to add an extra lamination to the inside to stiffen them up if need be.
The single speed frame is at least as stiff as the steel Condor frame but is more comfortable as it absorbs vibrations better. It's not as stiff as large tubed alu or carbon frames though. Most of the flexibility that I've noticed comes from the lateral stiffness of the rear stays. I'm going to see how the stays on this frame feel when all glued up and may need to add an extra lamination to the inside to stiffen them up if need be.