Ebike Racing Hawaii 4th of July weekend

mikebermea

100 µW
Joined
Dec 5, 2016
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Location
Hawaii
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This was Yesterdays Ebike race at Kahuku MX Track on the north shore of Hawaii. Its raw race footage.
Part one
https://www.youtube.com/watch?v=EulyKMLrwZc&t=628s
part two
https://www.youtube.com/watch?v=-yG8hEuljaw&t=315s
part three
https://www.youtube.com/watch?v=-yG8hEuljaw&t=315s

-Three 12 minutes (Raw footage) segments of the 4th of July weekend Ebike race on north shore of Oahu at Kahuku MX Track. (Team Chillaxin) (Ebikes Hawaii)
-Race Length: 12 miles
-Terrain: rugged intermediate
-9 riders entered 5 finished (mechanical failures due to harsh course) Rider in video finished
-3 pedal assist bikes. 5 High powered custom bikes Cyclones, Bafangs, lightning rods, Yamahas and bosch all represented in this race.

-POV Rider's Bike. (Ground up home built rat bike)
-Chinese generic carbon fiber frame (Could be better)
-Fox Talas 36 front fork (Great front fork)
-165mm Fox Float rear shock(just ok)
-Shimano Alfine 8 speed internally geared hub (Bullet Proof!)
-Cyclone 3000 watt motor. (complete Monster)
-Custom mounting Brackets (Precision Machining Oahu Hawaii)
-Kelly KLS7212S controller Programed Down to 40amp continuous 80 amp burst. All the multistars can really handle (Absolutely Amazing)
-Battery for this race 70.3 volt nominal 19s lipo 16000 MAH Multistars (Good enough)
-Ogio no drag hard shell backpack (Plenty of space for batteries)
-Bike has pegs no pedals.(no need over 2kw)
-Continental Mountain king tires.(Superior flat protection)
-Magura MT2 brakes 160mm rotors (great budget brakes) Need 203mm rotors

-Bike specs for race:
-GPS verified 50.4 mph top speed. (Top speed achieved during race only 31mph)
-First gear Torque @ 40amp 80 ft lbs
- Contiuous power 70.3 x 40= 2812 watts or 3.77hp
-Peak power 79.8 x80= 6384 watts or 8.55hp
-160 mm front travel
-140 mm rear travel
- Standard 10 speed chain.

Strengths:
Strait line speed.
Hill climbing ability.

Weaknesses:
Home built reliability
Wheel travel (Need 180mm+ at Kahuku)
Frame rigidity (Massive flex under torque)
Too short of wheel base. (Hard to keep front end down)
 
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