This just isn't true in my case; if my bike didn't fold up, I wouldn't be able to take it on commuter trains during rush hour, so it would become useless as a commuting machine. .
If you couldn't ride your bike there'd be no point in taking it on the train. If you couldn't ride your bike it would be useless as a commuting machine.
Ephemeral - I had to look that one up. There's nothing ephemeral about a comfortable saddle.
ephemeral
adjective
1. lasting a very short time; "the ephemeral joys of childhood"; "a passing fancy"; "youth's transient beauty"; "love is transitory but it is eternal"; "fugacious blossoms"
noun
1. anything short-lived, as an insect that lives only for a day in its winged form [syn: ephemeron]