30 Mar Reinventing the Wheel
Nextboards – reinventing the wheel
Wheels are probably most important component of every longboard especially on those tuned up to
speed. Most important parameters are diameter, contact patch, durometer, lip shape and on electric in-
wheel longboards also urethane depth. To little and the ride will be bumpy and totally unpleasant. So
we decided to go for 85mm diameter, 70mm contact patch 80 shore A durometer and 17,5mm urethane
depth. The wheels are built on aluminium core that aloves easy mounting on the electric in-wheel
motor. Our wheels are best for high speed, they are grippy enough and predictable and of course they
will not let you down even when sliding sharp corners.
But it was not so at the beginning – then we used aluminium core with four 2.5mm deep grooves to
create a mechanical lock between the core and urethane. It worked, but not for speeds of over 90km/h.
At that speeds the wheels are rotating so fast that centrifugal force could tear the urethane off the core
then the urethane spreads to the point that it could separate from the core. This is of course extremely
dangerous and because our board is capable of even much higher speeds we found a solution to make
the wheels safe for the speeds that were never achieved on any existing longboard. We totaly
redesigned the core so that urethane bonds to the core from inside and outside so there was no chance
to separate from the core any more. All our prototype wheels are made that way now and since total
core redesign we never had any problem with the wheels whatsoever! But the redesigned core is quite
expensive so it is not convenient for massive production. Here’s where our partner from rollercoaster
business comes in. They made special wheels for us on totally basic alu core even without grooves. And
because they did the job perfectly also our production wheels are totaly safe for any possible speed.
Over the time we learned a lot about the wheels for electric longboards that all others will still have to
learn, but until that …