One year ago I made my first build with a 50A 12s5p battery pack, 60A BMS, 50A superFOC 6.8, and one 6374 maytech motor. I went with a 36" Landyachtz board with 73A 97mm wheels and Caliber II trucks. After testing a 36/15 gearing, I ultimately settled on 42/15.
So far I’ve had tons of fun with this board. It also helped me get my feet wet with cramming as much lithium as possible on an esk8, and getting to know its mechanics.
As I recently went too easy on the loctite, lost a front wheel, and scraped out the axle’s threading during a ride, I decided it was time to say goodbye to urethane anyways – sooner or later the sorry state of asphalt in my city was gonna wipe out my board’s components with all that trembling.
So I set off to mount MBS Matrix III trucks on 36 degree angled risers, with 8" slickies and MBS Fivestar hubs. What a transformation! The ride is bouncy and comfy and almost feels too easy.
I’m now experimenting with gearing. I’m using a 15mm HTD450-5M belt, and after tossing out a 63/15 gearing ratio – way too little torque – today I did my first tests with 68/15, which feels much more like the 42/15 gearing on the urethanes. Mid speed acceleration feels great, but it’s still lacking torque on steeper hills.
If I want that extra torque on one motor, I’m gonna have to go higher on the gearing ratio, but I kinda want to keep the current speed. My battery only spews 2.5 kW of power at full charge, and I’m wondering:
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would a second motor, with the same amount of juice shared between the two, going to add torque by sharing some mechanical burden and lessen the excess heat? I’ve hot a big ol’ hub motor mounted on my ebike, and though it’s only got a 2kW battery, it’s way faster and torquier than the board, so surely sharing that 2.5kW of power between two sets of eskate motor windings is going to help?
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72T on the wheel seems to be a quite common setup around here; what kind of speeds should I expect from it?
Finally, I’m struggling with some mixed messaging regarding adequate belt length. Online belt calculators such as Timing Belt Calculator - Belt Length Calculator | B&B Manufacturing warn me that I’ve got too few teeth in mesh with my 450mm belt on a 68/15, while the folks over at https://fluxmotion.eu seem to go with 68/15 and offer… 405mm as replacement parts??
My board runs fine on the 450mm with 68/15 gearing, though I got some belt skipping on emergency braking with what I believe is already plenty of tension on the belt. So I should probably go with a 460mm, but wanted to throw it out here before eking out 30 bucks on yet another set.
Thanks for reading!
