4WD MTB build: advice needed

ESC given that when I’ve posted I’ve just read about the early bid for the D75 should I consider using 16s4p configuration instead?
Transmisson: what gear ratio would you suggest?
BMS: I see many listed here which one should I use? Should the main battery +/- be connected to the BMS or can it go straight to the VESC? I don’t understand why I should care about amp ratings if the purpose is just to balance the P group (sorry for my ignorance)

another adventurous who’s using NESE, It’s a tight fit, they got deformed maybe for the thermal expansion of the cell?

You’re probably going to run into problems trying to get BN270s to work on a mountainboard. They’re RKP trucks which were designed to be mounted on level decks and not angled tips, plus they’re narrower than most channel trucks (possible deck bite with larger tires or drives) and have 10mm axles, instead of the 12mm you find on most channels (weirder bearings).

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This bms. Wired for charge only.

I wouldn’t be investing in an unproven ESC given the state of the ESC market right now. The DV6 is a pretty solid ESC, hence the recommendation.

Gearing; if you’re using the 150kv motors i’d go for the 3.95 ratio. Else I’d go for 4.6 with 190kv.

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[I wouldn’t be investing in an unproven ESC given the state of the ESC market right now. The DV6 is a pretty solid ESC, hence the recommendation. [/quote]
given that D75 is made by the same company of DV6 and the potential to go 16s for about the same price you would still be holding off?
Given is a 4WD setup and very harsh inclines 20/25° with 100kg tol, how much current do you expect each motor will draw?
Higher Voltage == less amps correct?
Thanks for all the advices

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Thanks for noticing, which one would you choose instead?

Absolutely. Always happy to let more optimistic people have the opportunity to blow shit up first.

Watts are watts. 12s ESCs seem to be more reliable than anything else right now.

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I agree with everything you suggested except the wheels. 9" are a must for any serious off-roading, and aren’t that heavy. With 4WD torque should still be crazy.

Also I would recommend heat sinks for the ESCs. Sure you have 4WD, but the produced heat will be the same if not more.

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Eh I’ve done pretty serious offroading with 8 inch

9 is very slow and heavy, even truck feel is different. They are still fun but 8 inchers like MBS t1 or t3 are easier to ride on

Also heatsink not necessary especially in 4wd. 4wd is less load than 2wd and you’d be hard pressed to overheat a dv6 in the first place

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Disagree on the heatsinks. 4wd with dv6 will run cool as a cucumber unless you’re towing tractors

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The other ones you listed should be fine, although I’ve heard the Vertigo hangars tend to warp easily.

I just built this one. (For a client) It has 9” which as has been said is a little more ponderous and heavy but useful for really rough conditions.
I did another one a couple of years back and used 6355 motors and was very useable.

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What peli are you using there?

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Peli 1200 with Apex NGB battery. 12s6p p42a.

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vertigo by Trampa? Ive had mine for a while and weigh about 260, I jump a bit but no serious ramps yet just grass hills. no signs of warping!

Yeah one of the major benefits from 9 inch is you have tons of ground clearance

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One thing to consider is weight. I also wanted to build a heavy duty 4wd mountainboard until I tried a 2wd form a friend. Then I imagined adding another set of heavy drives to the other side and how that’s going to decrease the maneuverability.

I do a lot of small jumps with the front wheels when going over obstacles, adjusting my balance or changing direction.

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Yep it looks like several people have run into issues in the past, it seems that Infinities are fine but Vertigos have too much material lost or something.

Ah, I have the solid axles, must be the infinity then my mistake.

Hi @ eliSk8.

I’m 198 cm and 85-88 kg.

I use a TRAMPA HS11 deck 16 ply with 10 inches tyres and TRAMPA PHATLADS rims, 2x FSESC 6.6 DUAL controllers (I’ve used 5 of them, killed only one but it was my fault) with ESKATING.EU (Maytech) 6374 190kv motors, 4x TURNIGY GRAPHENE PANTHER 6000mAh 6S 75C battery packs.

I’ve chosen TRAMPA straight cut spur gear drive because in my opinion it’s the one which offers the best protection for the aluminium tubs. Their aluminium bash guards are great! I also like the clamping system. The mount never moves on the hanger.

TRAMPA VERTIGO trucks needed the barrels kit upgrade so as to improve stability with 10 inches wheels. But it remains a feeling that if you take a bump on one side of your board on a clean road then you are sentenced to bad injuries if you were fast. No issue off-road.

10 inches wheels felt awfully unbalanced with the MEGASTARS because of uncentered spokes.

This build is 23.7 kg but it’s amazing for off-roading and going far from other people.

You’re right about amps I’ve never exceeded 60A max battery current per ESC.

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