Charlie and Mamachari

Borrowing a bicycle…
Charlie: I need to pop down to the shops.
Hiroshi: うん、いいよ。うちの二台目の自転車、使っていいよ。Use my Mama-chari.
Charlie: A what? Sorry—did you say mama Charlie? My name?
Hiroshi: ちがうよ！ママチャリ。Mama-chari. Not your name! Means “mother’s bike”.
Charlie: Oh, like a shopping bike? Does it have gears?
Hiroshi: 三段だけ。でも坂道はちょっときついよ。Have basket and gears three.
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Voice-over
A totally practical Japanese bicycle… ママfor mother, チャリ short for charinko, link to “chariot” undetermined.