Zerobricks

Indeed, they are 9 studs long, not 9,5, also remmeber when you measure, that there is 1 stud offset.

Frictionless 3 module long pin is now yet again available in light bluish grey, it appears in the Gameboy switch detail.

I guess that means none of the 2026 sets is using any of the listed parts? I'm also worried about planetary and portal hubs being discountinied, they have been one of the most versatile parts ever released. But we have seen the PU L motor being discountinied and return in the past, so I'm staying hopeful.

42160 is the best one for that.

Thank you for the praise! Regarding the gearing question, when using 81.6 mm wheels with fast output, I was able to reach some 30 km/h. So I think 25 km/h or close should be doable with 68.8 mm wheels. And I think 42125 is a good candidate, though perhaps use the newer hubsamd cv joints to hold and drive the wheels.

Looks good, but how will it steer?

Thank you for the praise, my friend, I could increase steering angle to 30° but usually such high steering angle is not needed, since the cars are small and tracks have plenty of space. Indeed the model looks long, but it's actually not much longer than the Bolide for example. The soft front tyres should help with understeer. Regarding tracked vehicle, the shock absorbers of the suspension arms are under slight pretension, which I hope will be enough.

Thank you for the kind wishes! As long as the bevel gears are inside the part 48469, they can handle quite a lot of torque before skipping. I'm using same parts in my Universal offroader V2 and they have yet to skip. Of course, having 5,4 downgearing in planetary hubs reduces the strain on those gears a lot.

I was invited to the Romanian RTXP challenge which will be held next weekend, so it felt only right to make a video about the models I'm taking with me: Can't wait for some friendly competitions and to spend some quality time with friends!

Another great source of detail car knowledge is Car Bible: https://car-bibles.com/ I remember reading all the articles years ago.

Indeed, as long as they are coupled with an identical gear ratio, they will multiply torque, not speed.

Use Bricksafe or Brickshelf to upload your photos and link them here.

And here's a silly PC upgrade, something to make it more lively:

And they all use some kind of a mechanism that would be otherwise impossible to manufacture in one go.

Great progress of a really awesome set, Grum. Regarding 15100, there are actually 2 versions, newer ones released after 2022ish are a lot softer and have a different pin shape. I remember originals from 42096 and those were really tight.