2018 Lost Sierra build
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Guerrilla Gravity MegaTrail (hand made in Colorado)
MRP Ribbon fork, 170mm (made in Colorado)
SRAM Guide RS stoppers, 203mm Ice Tech rotors (purposefully incompatible SRAM/Shimano standards be damned)
RockShox Super Deluxe rear shock
DT Swiss M1700 wheelset, Maxxis Minion DHF 2.8" front, Minion DHR 2.5" rear
SRAM EX1 48t-11t cassette, 8 speed w/ EX1 ebike chain
SRAM steel Xsync 30t chainrings (motor+derailleur)
OneUp 150mm dropper post
42lbs, ready to ride
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Hardened steel cassette, steel chainrings, ebike chain, Ti-nitride coated motor chain (cause it makes me faster)
Drive unit weight: 7.5lbs
Dimensions: 100mm diameter, 120mm length
Engine: Neutronics 3215, 225kV
Controller: Castle Talon 120, custom mount/heatsink, QS-8 main battery connect
Performance (calculated w/ 120A phase):
135ft-lbs crankset torque
400RPM crankset
48t cog: 216ft-lbs wheel torque, 21mph
42t cog: 189ft-lbs wheel torque, 24mph
32t cog: 144ft-lbs wheel torque, 31mph (straight chainline)
24t cog: 108ft-lbs wheel torque, 41mph
18t cog: 81ft-lbs wheel torque, 56mph
This drive is easily removed from the frame in only a few minutes, turning the bike into a 34lb enduro beast. A custom mounting bracket matches the lines of the frame and shows no flex under a full 8kW load. The freewheel crankset can remain in place or is quickly swapped with a standard crank arm for another 1lb of weight savings. The CA remains tucked behind the handlebars, the Domino is exchanged for a normal lock-on grip.
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Why a removable motor unit? So I can race Cascadia enduro events one weekend, plug the motor in, race Lost Sierra the next, pull the motor and ride the Downieville DH course same day. This bike is capable of competing in absolutely punishing Enduro World Series events and hang with the motos in OHV areas. One bike, any trail.
Come out, let's ride bikes!