# How to build the fasted board possible

If you were a crazy man and wanted to build the fastest possible RELIABLE board that could hit 35-40mph how would you go about it? what parts would you use?

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if its a diy board and you want to do 40 and you want it reliable I think you need to even out all the kinks in whatever parts you chose before you do that 40. diy and reliable dont go together at first

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12s6p battery pack with 30Q cells, 200kv 6364 or 6374 motors, VESC-X x2, 107mm Abec 11 wheels, BMs for charge only and max the Bat Max and Motor Max in the VESCs. That should get you close.

12s 200kv on a vesc is how you fly at 40mph

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to clarify, â€śflyâ€ť as in, you broke your vesc by exceeding erpm limits

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Nopeâ€¦57456 ERPM.

The problem with that Calc is that it doesnâ€™t calculate with full charge voltage. 50.4v for 12s

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Big wheels, high voltage, and low reduction ratio = the key to speed

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50.4 x 200 x 7 x .95 = 67032

Li-ion pack simply wonâ€™t be at 50.4V under load. There will always be some degree of sag.

@filmerskier97 If you want a really high reduction ratio use hub motors, 1 to 1

Link below, the world record uses 4WD hub motors.

Fastest speed record on an electric longboard set at 102.9 km/h

Esk8 Calc; 12S, 170kv, 97mm, Gear ratio 1:1

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doesnâ€™t have to be, with a little decline, thereâ€™s suddenly low load and youâ€™ll be hitting the rpm limit

I didnâ€™t do math but I do 30mph on 90kv hub motors with 81mm wheels and I think u could hit 40 mph with just 120kv hub motors. I can wind you that and Ive got new motors in a couple weeks that match these abec11 centrax 83x78 wheels.

http://www.abec11.com/products/abec11/abec-11-77mm-centrax-77a-80a-83mm-centrax-77a-80a

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I think I would build an uneven drive board if I was looking for crazy top speed. Have a 170kv and a 200kv on 12S would probabaly be crazy enough. Or maybe even 280kv and 430kv on 6Sâ€¦

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This setup got my 185lbs up to 33mph. 12s Lipos TB 12s ESCâ€™s and Carvon 145kv hubs Maybe with Vescs, I could have got close to 40mph (Vescs seemed to be much more efficient than those car ESCâ€™s) However, I doubt I would have the courage to go that fast. Even 30mph was out of my comfort zone. Note: the blue wheels are 97mm I did 33mph with my yellow 90mm wheels.

Check this out, 55mph with a dual belt drive.

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While also illegal, testing on a live road like that seems supremely stupid. Who knows what debris or pot holes there are on there, not to mention if you wipe you can easily get run over.

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Ya, pretty crazy alright. Definitely not for me. I like to skate in my comfort zone.

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39.65 mph with lipo 10s, 18/32 gears and 107mm wheels.

http://calc.esk8.it/#{â€śbatt-type-lipoâ€ť:1,â€śbatt-cellsâ€ť:10,â€śmotor-kvâ€ť:190,â€śsystem-efficiencyâ€ť:80,â€śmotor-pulley-teethâ€ť:18,â€śwheel-pulley-teethâ€ť:32,â€śwheel-sizeâ€ť:107}|

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fastest != 40mph

If you want the fastest, youâ€™d probably want: a 2 speed transmission (one for a torquey start, one for a high top end) dual drive with 60+ mm motors (you can go dual diagonal with 80100 motors) or you can go quad drive with higher kv motors so youâ€™ll have better top end speed (this route is mechanically simpler, but a lot less efficient) stiff deck with a wide wheelbase high c lipos or lifepo4 cells (the size of a li-ion pack that could put out the needed amps would likely be impractical) kelly controller (if going above 12s) lots of \$\$\$

this is diy; reliability depends on your math, attention to detail, and the quality of the parts you pick otherwise, just go for the tried and trueâ€¦