When a group of Rivian engineers left the electric truckmaker last year, they didn’t start another car company. They went smaller. This week, their new startup ALSO unveiled a line of electric micromobility vehicles, including a modular e-bike called the TM-B, two pedal-assist quads, and a connected smart helmet. The launch comes months after the company quietly raised $200 million from Greenoaks Capital, bringing its valuation to $1 billion, according to Bloomberg.