Pumping eSk8 Truck Advice

ESK8 Mechanics
1

Hi, for my next build I am planning to do an electric board for pumping (LDP). I plan to use my loaded overland to build it (primarly because I have it lying around and I really like the shape of it). But I am completely unsure about the trucks.

I currently have 2 boards using dual caliber II 50. And they are very fine for commuting, carving around and simply have fun but feel too stiff when pumping. I am thinking about using these front trucks:

Together with a dewedged caliber II 50 (because of availability of mounts).

But as I have no way to test it out before buying them, I would very much appreciate your input. Maybe someone already used them, or has experience with pump builds.

Thanks in advance!

2

Confused on the concept. Do you accelerate by pumping and the motors kick in to keep you at speed?

I thought pumpers like TKP trucks, Bennett Vectors in the front and Tracker RTS in the back or something like that. I imagine the guys at pavedwave would have better advice on pumping trucks

3

Sorry for the confusion. The motor is only there for braking, helping me with hills and getting home again;) Generally I would like to pump as long/far as possible.

I also already read they prefer TKPs therefore the idea with the dont trip front truck. But I kind of cannot really switch the back truck freely due to the mount availability.

4

Shouldn’t you get hub motors? Because belt creates drag

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5

Maybe I should… But I would like to start with a single belt because I would like to test different wheel sizes and gearing. Currently I dont have issues with the freewheeling of my single belt setups, but ofc you are right - should be better with hubs.

6

There will be a lot of drag w the belts and the motor. Even with a hub motor there is drag. Maybe forget pumping n push the throttle or maybe u could find a belt that would be easy to engage n disengage but I doubt it.

7

The drag is present, but on my current single motor with a single idler it is totally fine to push. The weight of the board seems to keep it rolling.

8

Push, sure, but pumping…that’s a lot of pump necessary to equate to a push

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9

Ah, I thought he was using push and pump interchangeably.

10

Thanks for your concerns, but I am aware of the drag issue. I have 2 single belt boards (6355 and one with a 6374) and I can pump around just fine as long as its flat. When its getting slightly uphill I use a little bit of power from the battery to keep rolling. So this part is working already just fine.

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11

Sorry to go off topic here a bit, but wouldn’t it be a great setup to have some sort of speed assist control here? A control that aims to neutralize drag and diminish power when pumping is adding momentum. Sorry I don’t have an answer for your trucks, the only thing I have done is wedged both front and rear trucks for more turn.

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12

You could use a single rear wheel with a freewheel/belt setup. No regenerative braking, but you could use a simple mechanical brake.

13

Not all the belt board have drag, if you use one-way bearings with a belt motor would be no drag - see the implementation of the use of one-way bearings from Carvon X.

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14

Very interesting topic ! I personally come from the long distance longboarding scene and have been toying lately with the idea of an e-pump assistance system. If you are still at it, give me a shout out :slight_smile: I am totally new to e-skating, however I can provide some pumping expertise^^ The Poppy truck is btw. THE go to front truck for ldp.

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