I am building a dual drive board using the Prism Theory deck, TB 218 trucks, 107 Flywheels. My question sense you have experience with this deck is do you think I will have any issues with wheel bite etc. I was also going to use the TB V5 mount but as it is not adjustable I am a little worried about clearance to the motors. Any thoughts?
Well as far as ESC I feel like the Unity is finally something rubust enough to be considered on a real vehicle.
I have yet to see one not working anywhere. It’s also has a lot of idiot proof things like the Unity UI. Makes it much more difficult for a noob to blow something up. The old 4.12 vesc would blow a drv if you looked at it wrong.
You will need 3/4 inch or 1 inch risers and it will feel really high and crappy, I would personally go with 3.4 inch risers and 90mm reflys on that deck, the deck is actually a lot smaller than it seems…think small dude or younger humans type deck, not a giant wide giant wheel monster…there’s a balance to it…I use 180mm trucks and 97mm, and I think lower would have been even better…
Thanks for the reply. Maybe I should have gone with a different deck then. We are only talking about 8.5 mm different in height using the 90mm vs. 107mm. Will it really feel that much different in height? I am just questioning because I am new to this, please don’t take it the wrong way.
8.5mm doesn’t seem like much but it also gives you clearance for lower risers, which exponentially lowers the whole setup. And yes, you will notice anything above .25 of an inch, 8.5mm is about .33 of an inch so it will be noticed in the leverage of the deck. think of the whole skateboard as needing to be proportionate to itself, and you have the largest skate wheels known to mankind, one of the widest trucks available, and yet the deck is a small compact downhill slider made for smaller dudes…I personally would put 160mm or 180mm trucks on that deck with 90mm or below wheels…but I am a perfectionist about that balance of scale and how it rides. For your setup, 218mm trucks on 107mm wheels, I would have gone with a cutout type longboard deck like Hummie deck, I am building one of those myself right now, same config. 
When you get into kicktail and top mount stuff, you really want to tuck the wheels under the deck, that’s the whole point of them so you get that nice leverage of actually standing over the top of the wheels themselves… so narrow trucks and not giant wheels would be needed…90mm is still huge for a skateboard and gets the job done…I personally love the 90mm Refly, its my favorite wheel…
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It’s linear, not exponential
I find that to be untrue, as it changes on a curve. lowering wheel size only allows for half the difference to be used in riser height. when I use a smaller wheel, the wheel is further from the deck, resulting in a lower riser. I find the change is not linear when re configuring and a smaller wheel will exponentially provide a lower overall setup height of the entire board, due to the lower size the wheels and risers provide together, combined…
If I have to use a 107 wheel, on that deck, I would be using a 1 inch riser ( I know because I did that)
If I use a 90mm wheel I am immediately lower, overall by about 8mm’s (just due to the wheel size alone). But if I reconfigure the risers for the new wheels size, I find I can use 3/4 inch instead of the 1 inch, further reducing the ride height of the setup another 6.5mm’s…I hope that makes sense… so in effect a wheel that is only 8mm lower will actually be 14.5mm lower in your overall setup…which is quite a bit…
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Thanks for all the detail in your response, it helps alot. Looks like I will be going with the 90mm Reflys. I believe I will still have to go with the TB218s becuase I am going to be using dual 6380s 170kv with 15/40 gears. I am a big guy (300lbs) and want to make sure I have punty of torque. That should give me just over 21 Nm with punty of topend speed. Unless I am missing something.
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You can go dual diagonal if you wanna keep a narrower trunk set up and still run 6380 motors.
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Good point. I am committed to running a FocBox Unity, so that doesn’t seem ideal. Great option for a dual FocBox setup.
You can do dual diagonal on one truck. I plan on doing a fwd set up like that soon.
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Im interested to know more about your truck set up…as i read i got a little confused…i a. 42 and starting my first build as a commuter…well i ride for fun now…i had to move states abruptly and my longboards were left behind…i just scored a sector 9 carbonite and so far i cant ride it like i did in the past…downhill it gets way to fast way quick…i dont bomb straight doenhill…i carve…like soul surfing…it doesnt hold in the turns and gets the wobbles reallu fast…any help would be awesome…
So I got my wheels 90mm Refly’s. Like you said I am defiantly going to need some risers. So here is the stupid question. I can’t seem to find any 3/4" risers. Do I need to stack them to get that height? What risers would you recommend?