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Rivian's TM-B electric bike

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188 points hasheddan | 1 comments | 22 Oct 25 18:00 UTC | HN request time: 0.207s | source
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jakedata ◴[22 Oct 25 20:21 UTC] No.45674654[source]▶
$4500 is ten or more of my homebrew 750 watt electric mountain bike originally built in 2004. I just repowered with LiFePO4 after 10 years in storage and the new batteries really pull. It has a front hub motor with a throttle control limited to 20 mph. My commute is 10 miles, 6 on a dedicated bike path. Life is good.
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IncreasePosts ◴[22 Oct 25 22:08 UTC] No.45675773[source]▶
The components are all probably very junky, if everything can be had for $450
replies(1): >>45675931 #
1. jakedata ◴[22 Oct 25 22:24 UTC] No.45675931[source]▶
Sure if you can't DIY. It's a 20 year old Fuji chromoly-frame mountain bike with Shimano components. My biggest expense was new batteries, followed by heavy duty e-bike brake pads. What did you pay to build yours?