Rivian mobility spinoff readies $4,500 e-bike as first product

"Also, the micromobility startup spun out of Rivian Automotive Inc., has unveiled its first consumer product: an electric bike that will cost up to $4,500. Called TM-B, the class 3 e-bike, which don't require a driver's license, will launch in spring 2026, offering riders pedal assistance up to 28 miles per hour and, where allowed, a throttle reaching 20 mph. The $4,500 Launch and Performance editions share features, while a cheaper standard model, priced below $4,000, will follow later next year."

"The TM-B features a pedal-by-wire drive system with no mechanical gears. Pedaling powers a generator that feeds the battery while software controls torque and speed. A detachable battery pack comes in standard and large sizes, offering up to 60 and 100 miles of assisted range, respectively. Regenerative braking can extend range by as much as 25%. The battery uses the same vehicle-grade cells in Rivian's consumer EVs and includes USB-C fast charging."

Also, a micromobility startup spun out of Rivian will launch the TM-B class 3 e-bike in spring 2026 with Launch and Performance editions priced at $4,500 and a standard model under $4,000 to follow. The TM-B offers pedal assistance up to 28 mph and, where allowed, a throttle reaching 20 mph. The bike uses a pedal-by-wire system with no mechanical gears; pedaling powers a generator while software controls torque and speed. Detachable battery packs provide up to 60 or 100 miles of assisted range, regenerative braking can add about 25% extra range, and the battery uses Rivian vehicle-grade cells with USB-C fast charging. The startup spun out with $105 million from Rivian and Eclipse and later raised capital from Greenoaks at a $1 billion valuation as it targets short-distance micromobility demand.

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