That would break down in short order. Wood isn't suitable. The crankshaft and axles would snap from stress if they didn't wear from fricton and vibration. Th

That would break down in short order. Wood isn't suitable. The crankshaft and axles would snap from stress if they didn't wear from fricton and vibration. The frame would be subject to horrible vibration and shocks; it would quickly be shaken apart. Bicycles are a product of advanced metallurgy and precision machining, particularly for bearings and races. We didn't develop them until that technology was established.