A friend of mine asked me recently about any tips I might have on folding (and/or electric) bikes. I emailed a response that I thought presented a useful round-up of my learnings, and thought it worth sharing here (slightly modified as well.
The 4 main folding bike systems/manufacturers I recall that produced bikes with wheels the right spec for Cityrail are:
The specs for Cityrail are:
Folding bikes are permitted on trains free of charge at any time, provided the bike is folded and carried in a bag before boarding. The bike (in its bag) must not exceed these dimensions: 82cm length x 69cm height x 39cm width with a maximum wheel rim diameter of 51cm. Free travel does not apply to CityRail bus services, including trackwork or NightRide buses.
There are a couple of other systems I’ve seen, the notable ones are:
Tern are a spin-off from Dahon. They have the same folding mechanism and are run by one half of the family that owned Dahon. The split tainted the Dahon brand fairly significantly in my opinion, as it seems that the folks behind Tern were a bit more entrepreneurial and innovative, leaving Dahon primarily as a manufacturer (rather than design-led) [Update 1-Feb-2012: See comments for response from Dahon]. I put my money on Tern—I have a Link P24h with electric conversion from Sydney Electric Bikes. (I’ve written about my experience before). If I were to do it over, I’d probably get the Link P9 (http://www.ternbicycles.com/au/bikes/link-p9), as the in-hub gear on the P24h has proven to be a bit of a pain in terms of maintenance, and in practice I never use it.
The Brompton is a neat folding mechanism that is very compact, but I think it would probably be too small for folks of my height (6″+). I’m personally not a fan of the Birdie’s design. The larger Montague’s are awesome, but fall foul of Cityrail’s guidelines.
If I were buying today, I’d be seriously considering the Conscious Commuter electric, as the weight reduction and inbuilt battery are significantly better than what I’ve got. Though they still seem to pretty much be in “Kickstarter” mode, and are an unknown quantity in relation to quality/durability etc.