Re:Folding bicycle small enough to fit in hand luggage
by ridehelix on Wednesday March 23, 2022 @10:25AM
(#30778768)
There were many reasons to choose Ti over steel, aluminum or carbon fiber. Steel would have significantly thinner wall thickness and would be less durable. Folding bikes get handled a lot, they get banged up, fall over, experience crushing forces etc. Carbon fiber is also less durable for this use case and aluminum would have been heavier for our design. Ti leaves no compromises other than cost of manufacturing but that is a great challenge to work on and there are many ways to optimize it which we are working on.
Re:Folding bicycle small enough to fit in hand luggage
by Schroedingersat on Thursday March 24, 2022 @09:08AM
(#30789212)
Would you be open to an entry level version in steel with single speed targeting 12kg or so? This would solve many of the manufacturing and part shortage issues.
Hell, I'd probably buy one without any parts which were standardized and likely to be customized anyway (saddle, brakes, bb and cranks, levers, chain, freewheel) and just move them over from a current bike.
In my experience (and maybe you'll correlate), all materials involve compromise; there doesn't tend to be a case where a material is outstandingly better in all categories.
Comparing titanium vs. the best steels, it's half the weight but also half the modulus of elasticity and half the tensile yield strength. I wouldn't expect there to be much weight advantage when comparing two tubes with roughly equal properties but maybe this is a case of "every little bit helps"?
If I remember rightly, titanium is harder to process also.