I like the idea of the Wild Thumper wheels – 120 mm diameter, and 60 mm width, with knobbly rubber for traction.
The center holes are a bit small (4 mm axle, perhaps an 8 mm hex nut?) and I also would like the torque and speed of the 37D motors compared to the 25D. I’m carrying a fair bit of load and would like a 10 mph speed.
Are there similar wheels somewhere (RC hobby world, perhaps?) and some robust way to attach them to the 6 mm D axle of the 37D motors? I know nothing about how the RC hobby world works; most wheels just list the “hex size” which I imagine means the size of the hex nut that locks into the hub of the wheel – but what about axle size? Is it always half the hex? And what’s a good way to get a hex nut onto the 6 mm axle? Where can those kinds of parts/adapters be found? (Also, ideally, in 316 stainless or similar high-strength material, although I imagine the gear motors are not of that grade…)
For example, these wheels seem similar – a few millimeters smaller: www3.towerhobbies.com/cgi-bin/wt … LXXCC8&P=0
Sadly, most RC hobby sites don’t list dimensions at all, just specific car models
The second question is about suspensions – the RC hobby pages I’ve found mostly sell completed axles with transfer knots and all, which is not exactly what I want. First, the linkage to the 37D motors would have to be solved, and second, I really need the integrated encoders for each wheel (so, a motor per wheel.) Also, most of them seem a little on the flimsy side, as all they need to carry are some drawn polycarbonate chassis…