Tesla is losing one of its most senior engineering executives, Colin Campbell, and he is going to a company founded by Tesla cofounder and board member JB Straubel.
Colin Campbell joined Tesla in 2006 when the company was nothing more than a small startup with a plan to bring an electric sports car, the Roadster, to market.
As one of the earliest engineers to join Tesla, Campbell rose through the ranks of the powertrain team as the company grew from a startup to one of the largest companies on earth.
In 2016, he joined the executive team as a director of engineering for power electronics. He was quickly promoted to senior director in charge of all powertrain development:
Responsible for the electrical, mechanical, and manufacturing engineering of high power electronics, motors, gearboxes, battery packs, and charging systems across both vehicle and energy businesses.
Most recently, he was vice president of powertrain at Tesla, but he has now announced that he is leaving the company after 17 years.
Campbell announced on LinkedIn today that he left Tesla to join Redwood Materials:
After 17 incredible years at Tesla, I’m excited to share that I will be joining Redwood Materials as CTO!
The engineer will join his longtime colleague, JB Straubel, who was a cofounder and longtime CTO at Tesla before he left in 2019 to start Redwood, a company that is trying to create a North American battery supply chain through the production of cathode and anode materials and recycling.
I had a once-in-a-lifetime experience at Tesla and, as an engineer, I can’t begin to summarize how many rewarding technical challenges I encountered while building our thrilling, safe, reliable, and increasingly affordable EVs. My time at the company began when we barely had a proof of concept and ends with millions of Teslas on the road worldwide. We not only made a difference on global emissions, but also forever influenced how the world thinks about transportation and helped to shape the product roadmaps of almost every other automaker. It’s been more rewarding and memorable than I could have imagined.
But there’s a chance that he might still get to work with Tesla in some capacity since Straubel rejoining Tesla has sparked rumors of the two companies building ties.
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This week on Electrek’s Wheel-E podcast, we discuss the most popular news stories from the world of electric bikes and other nontraditional electric vehicles. This time, that includes a new ONYX RCR 80V electric moped, new lightweight e-bike motors, Aventon’s powerful update, California cops catching illegal e-bike riders with drones, a super lightweight new e-bike from Dahon, and more.
Today’s episode is sponsored by CYCROWN, an e-Bike company born from a passion for cycling. Its lineup now includes the new CYCROWN Dremax – a high-performance urban commuter e-bike now on sale in the US and Canada. Use Electrek50 to save $50 off your new eBike when you order.
The Wheel-E podcast returns every two weeks on Electrek’s YouTube channel, Facebook, Linkedin, and Twitter.
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While much of the Western world is still figuring out how to get more people on electric bikes, China just flipped a switch, and the results are staggering. Thanks to a generous nationwide trade-in program rolled out around six months ago, China has seen an explosive surge in electric bicycle sales, with over 8.47 million new e-bikes hitting the road in the first half of 2025 alone.
The program, which offers subsidies to riders who trade in their old, often outdated electric bikes for newer, safer, and more efficient models, has sparked a new e-bike sale boom in a country already dominated by e-bike travel. In major provinces like Jiangsu, Hebei, and Zhejiang, over one million new e-bikes were sold in each region in just six months. That’s a tidal wave of e-bike sales.
The incentives vary depending on location and the model being traded in, but for many consumers, the subsidies cover a substantial portion of a new e-bike’s price – enough to turn a “maybe next year” purchase into a “right now” upgrade. And these aren’t just budget bikes either. The program has driven demand for higher-quality models with better batteries, safer braking systems, and more reliable electronics, accelerating both adoption and innovation across the industry.
The move has proven successful in replacing the millions of older models with lower-quality lithium-ion batteries that had posed safety risks around the country. Instead, China has pushed for higher-quality lithium-ion batteries, a return to a newer generation of higher-performance AGM batteries, and even interesting new sodium-ion battery options.
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Most e-bikes in China look more like what we’d consider seated scooters
According to China’s Ministry of Commerce, more than 8.4 million consumers have participated in the e-bike trade-in program so far, contributing to a sales increase of 643.5% year-over-year and more than doubling sales month-over-month. Meanwhile, production of new electric bicycles rose by nearly 28%, as manufacturers scrambled to meet demand. The sales boosts have already been seen in the financial reports of major industry players like NIU.
And it’s not just the big players benefiting – over 82,000 small independent e-bike dealers reported average sales increases of ¥302,000 (around US $42,000), giving a serious boost to local economies.
What’s particularly striking here is how fast this happened. The program was officially launched late last year as part of a broader effort to stimulate domestic consumption and phase out outdated vehicles and appliances. But while most analysts expected gradual growth, the e-bike sector responded much more quickly. In less than a year, the trade-in subsidies have reshaped the electric bicycle market, creating a consumer-driven boom that shows no signs of slowing.
For those of us watching from outside China, it’s hard not to wonder what might happen if other countries tried something similar. While most families in Chinese cities already own an electric bike and thus see this as an opportunity to trade it in for a newer model, Western countries like the US are still figuring out how to stimulate commuters into buying their first e-bike.
It’s too soon to know exactly how long the boom will last or whether the momentum will carry into 2026 and beyond. We’ve seen bicycle industry bubbles grow and burst before. But one thing’s clear: with the right incentives, even modest ones, it’s possible to ignite real, large-scale change. China just proved it with nearly 8.5 million new e-bikes to show for it.
And if you’re wondering what it looks like when a country takes electric micromobility seriously, this is it.
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Today was the official start of racing at the Electrek Formula Sun Grand Prix 2025! There was a tremendous energy (and heat) on the ground at NCM Motorsports Park as nearly a dozen teams took to the track. Currently, as of writing, Stanford is ranked #1 in the SOV (Single-Occupant Vehicle) class with 68 registered laps. However, the fastest lap so far belongs to UC Berkeley, which clocked a 4:45 on the 3.15-mile track. That’s an average speed of just under 40 mph on nothing but solar energy. Not bad!
In the MOV (Multi-Occupant Vehicle) class, Polytechnique Montréal is narrowly ahead of Appalachian State by just 4 laps. At last year’s formula sun race, Polytechnique Montréal took first place overall in this class, and the team hopes to repeat that success. It’s still too early for prediction though, and anything can happen between now and the final day of racing on Saturday.
Congrats to the teams that made it on track today. We look forward to seeing even more out there tomorrow. In the meantime, here are some shots from today via the event’s wonderful photographer Cora Kennedy.
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