Why would you want to make this out of CFRP?
Why would you want to use a skinny axle like that in the first place? A BB30 axle can be over 3 times stiffer at less than half the weight.
@gbj_tester started
London Fixed Gear and Single-Speed is a community of predominantly fixed gear and single-speed cyclists in and around London, UK.
This site is supported almost exclusively by donations. Please consider donating a small amount regularly.
Why would you want to use a skinny axle like that in the first place? A BB30 axle can be over 3 times stiffer at less than half the weight.