by using this gear ratios the minimum distance from center to center of the pulley is around 103.87. that is if you don’t want to use a belt tensioner idle pulley which will increase the cost.
using just one M6 screw to bolt the mount and a TRUCK RING, like the one used by @torqueboards, with the difference that this is specifically designed for the matrix pro 2 mountainboard truck.
by the truck ring area, i included 2- M4 Set screw holes so i can use a 0.5 in plate of aluminium 6061.
here you can see i included 3- M3 holes to install a bumper for motor protection and will design a pulley cover for the wheel hub.
for the Truck Ring this one gave me a lot of trouble, i don’t know what the guys at MBS are thinking with this cross section. they sure always want to give a big headache with the shape of their trucks.
Well that is all so far, now we just wait for this part to arrive. i order a batch of 10 mounts ill have 6 available in case somebody want to go this way.
I’m also working on my own MBS truck mounts and was wondering if you would be willing to share the design of the truck rings? I’m also spending way too much time figuring out the right shape
I’m using Fusion 360, but would be happy with anything I can use to get the measurements from.
I’ve ended up going with quite a similar design for my first board, with MBS Matrix Pro ii trucks, and 8 inch MBS wheels on a flat longboard deck. I hadn’t considered that mountainboard trucks need to be mounted at an angle on a flat deck, so that’s currently where I’m at. I have no experience or tools for working with aluminium, so I’m attempting to make something out of plywood! Should work as a prototype, even if there are issues longer term.
Not the easiest first build, with the big wheels and the need for big pulleys to get reasonable torque, but I really want to ride on all the grassy slopes we have around here!
Hope you’re still working on this, would be interested to see more.
I don’t really like the idea of being strapped in, and wanted all the batteries and stuff to be hidden under the deck, so need that extra clearance of a flat deck. I guess I’m just going for a casual off-road board, inspired by the Evolve Bamboo GT. Proper mountainboards definitely look fun too though, maybe for my next build
with that type of configuration you need to be very carefull with the position of the motors and the dimension of the truck base, the clearance is too tight there.
you can make a mock up out of wood, but i recommend aluminium it is safer
Sweet, that’s good to know. I’m not sure where to get aluminium tubing/sheets etc. from around here either, but I’m sure at least some of the local engineers could point me in the right direction. I am wondering if I might have been better off getting some different trucks designed for flat decks, but making an off-road board it seemed off-road trucks would be best!
Already have made the truck base using a aluminium tube of 3x2x0.25 in cut to a 35 deg angle, cover with a 3x0.25 aluminium bar them attached together with 8 M3 screws per base.
