E-MTB Ripper | 2x 6374 90kv | 12s4p 30Q |

ESK8 Builds
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Part List:

Sick Motor Mount: https://www.janux-esk8.com/product-page/janux-dual-drive-motor-mount-system-for-trampa-carver

2x 6374 Sensored 90kv:

Trampa Infinity Trucks:

12s4p 30Q: collections/electric-skateboard-battery-pack/products/electric-skateboard-battery-epower-pack-12s4p

Battery Enclosure: collections/battery-enclosures/products/12s4p-enclosure-v2

Airless 6" Tires: http://www.diyeboard.com/6-15050mm-70a-airless-allterrain-wheels-with-hubs-pulleys-p-587.html

2x ESC Based on VESC 6: (Will be externally mounted)

Will be going for a 13t:60t ratio

Curious if any EMTB veterans have any suggestions. Will all be on a LifeLong Nomad dropdown deck.

https://www.blackdiamondsports.com/lifelong-nomad-42-maple-w-concave-longboard-complete

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Oh, and this for vibration absorption (ESC)

https://www.amazon.com/Isolate-Sorbothane-Vibration-Isolation-Square/dp/B0042U78H2/ref=asc_df_B0042U78H2/?tag=hyprod-20&linkCode=df0&hvadid=193154321880&hvpos=1o1&hvnetw=g&hvrand=5218806494670815854&hvpone=&hvptwo=&hvqmt=&hvdev=c&hvdvcmdl=&hvlocint=&hvlocphy=9011778&hvtargid=pla-309744481826&psc=1

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Any updates on this?

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Did you already order the listed parts?

With 90kv your top speed is below 30km/h (18.5mph) but you get crazy torque :crazy_face:. The Trampa trucks need to be mounted at 30° angle so if you use a longboard deck you need 30° angled risers. The 12s4p flat battery and enclosure works in combination with a longboard deck but wouldn’t with MTB deck because of the curvature.

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My math came out to different numbers. I’ll have to redo the calc in a sec.

I knew those trucks had to be mounted special, wasn’t sure exactly how, I probably will get the risers because the build is for a longboard deck. I really don’t want a curved true MTB deck, not for me.

EDIT: Calculator results

https://gyazo.com/2d31c2d03a288682de3b827bb5faa6a6

Is 65% efficiency for this build too high?

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You seem to have put 478mm in your calc for your wheel size… The tyres you’ve listed are 150mm.

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If you have bought the 90kv ones, you can just compensate with the gearing. Use a lower gearing than usually like 1:3.5 for example, and you will gain ground clearance too!

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Ah, brain fart. I was putting in the circumference not the diameter.

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Haven’t come close to buying it no, I’ll be changing my motor to around a 170kv

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I ride MTB alot 203mm wheel. 15-60 drive. 213 kv and 149 kv dual drive 12s6p battery. Torque and top speed for days

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2 different motors in one build? Or 2 different builds?

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Swap things about depending on if I’m hitting flat or trails and I have a few boards Because building esk8’s is like crack

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