Because I tour with a Brompton, have owned a few folders before/after, and am investigating a solution that includes the following features:
- a fixed frame for better perfomance + durability
- can be demounted in a few minutes on a train platform thanks to quick release attachments
- demounted size 120x90cm
- (option) disk brakes
- (option) frame-mounted front rack à la Brompton/Tern/Dahon
- < €$£1,000
Looks like there's no such bike on the market.