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Tangent/Zerode Lost Sierra race build

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Tangent/Zerode Lost Sierra race build

Old 08-21-16, 10:29 PM
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Tangent/Zerode Lost Sierra race build







Zerode G2 (unmodified)
Tangent Ascent @ 5kW
8spd Alfine IGH
Cane Creek Double Barrel coil rear
Marzocchi 888 Titanium front
Shimano Saint stoppers
Chris King hubs
Maxxis DHF rubber

Gearing limited 46mph top speed, it gets there as fast as you can shift. Weight is 51lbs. This setup is capable of 7KW but I don't need more acceleration on the trail, might as well conserve battery.

Only one of the 3 cogs is used, that's just the back end of a standard cassette for more stability than a stamped sprocket. Wanted that 32t cog to lower the gearing and this is an easy way to get it. It rides like a dream, as if the back tire isn't there. Whatever you hit, the bike doesn't slow down. And it's unflappable under power, it doesn't squirm or squat under throttle due to the high pivot design. The IGH is in the frame so all the mass is as centralized as possible. It is so reactive. It is heavy, but it's also stable at speed and it's not that heavy. Imagine every trail as a screaming fast pump track. Whether you're going up or down, you can ride as fast you dare. The front remains light and can easily be lifted by motor power alone through 3rd gear (25mph) and with a tug it comes up while seated through 5th gear. The pedals work fine too. 25 miles of trail testing without issue thus far.

Where would such a monster compete? Eco Bike Adventures is generous enough to host the first open class ebike race among the amazing trails in Northern Cali. 15 miles of amazing racing, Good luck fellow racers, this bike is faaaaast.




-dave

Last edited by tangentdave; 08-21-16 at 10:37 PM.
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Old 08-22-16, 04:20 PM
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Originally Posted by tangentdave
[IMG]Gearing limited 46mph top speed, it gets there as fast as you can shift. Weight is 51lbs. This setup is capable of 7KW but I don't need more acceleration on the trail, might as well conserve battery.
Are you sure you don't need "MORE POWER!?"

Very interesting setup. One I haven't seen before. Not sure you can call it a "bicycle" anymore, but one heck of a nice execution on taking the E-bike to a level beyond. I'd have to get out my motocross gear before riding that; full face helmet, leathers, armor, etc...

Must be a blast!
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Old 08-22-16, 10:59 PM
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Originally Posted by NoPhart
...Very interesting setup. One I haven't seen before....
Dave has a long thread over at the Sphere titled "Dave's 80:1 RC mid drive kit build log", as well as some vids on Youtube. His brilliant creations just keep getting better and better. I wish he would make something for street bike commuters that was 'very small' and stealthy, and quiet. There is a market out there, Dave.
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Old 08-23-16, 08:52 AM
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Even better for CA --- legal.
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Old 08-23-16, 12:47 PM
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+1 !



Originally Posted by slomoshun
Dave has a long thread over at the Sphere titled "Dave's 80:1 RC mid drive kit build log", as well as some vids on Youtube. His brilliant creations just keep getting better and better. I wish he would make something for street bike commuters that was 'very small' and stealthy, and quiet. There is a market out there, Dave.
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Old 08-23-16, 10:43 PM
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Nice! Thanks for sharing some pics and details.

-SP
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