Carbon Fibre

[LockH]

You will find the going hard here mate. Its very USA centric. Under 750w is ungodly and way under the radar.

Hehe... According to one theory, the world (human population) is becoming increasingly "urban" aka "congested" and while the world got along fine for centuries riding horses (750W= "one horse" powered), "powerful" and "high speed" vehicles are becoming "more dangerous" - to others.

Canada at least has legalized 500 watts... more like "pony"-powered.

... although legislations fail to mention "peak" power outputs... (Think, cheetah running speeds... "in Short Bursts". )

EDIT: PS... a kangaroo will do in a pinch... although some legislations might specify more wallaby speeds...

 

[LewTwo]

The problem that I perceive with composite carbon fiber frame or fork is catastrophic failure. When a metal component fails it tend to bend because most metals are malleable at ambient temperatures. When a composite carbon fiber component fails it breaks (separates). The reason I chose a Mitaya CT7000 frame for my light weight bike was because it uses a hybrid construction technique: the tubes are composite carbon fiber over a aluminum core. The tubes are joined together with aluminum lugs. My hope is that if the CF should fail then the aluminum will hold the structure together long enough for the operator to survive the failure. Having said all that I note that the fork is aluminum with a steel steerer tube. It is not the lightest possible construction but I feel it may be concept that takes advantage of the strengths of each material.

p.s.

... About nine years down the road... OP was looking for "a light, nimble e-bike

That ain't a bike.

 

[cycleops612]

Were a cutting edge front bike fork deemed a strategic military must have, it would be a solid ingot of titanium, squeezed like butter into ideal form, by a giant industrial press - 50,000 tonnes or more?