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Modern LEGO wheel hubs are known to suffer from a lot of slack. Other drawbacks are that you can only use them with CVT joints - not with the stronger and more angleable U-joints - and the section inbetween the pin holes of the hub is wider than 1 stud. While playing with one of them I noticed that part of the slack is because the DBG pins don't sit very tight in the wheel's pin holes. It helps a little if you have an axle running through the wheel which extends into the DBG-part of the hub. Now I know @nicjasno sells modified wheel hubs based on small turn tables, which have much less slack than the original wheel hubs. But than you still can only use them with the weak CVT joints. And you have a modified part. So I looked into using a turntable as wheel hub for the 15038 wheel (with 6 pinholes) without modifying it and it gives quite a good result. Better than the LEGO wheel hub: The turn table is attached to the wheel with 2 3L pins. The assembly inside the wheel makes sure the turn table's pinholes are attached to a pin and not to an axle (which would give slack) and sits tight against the inside of the wheel to give stability. Finally an extra belt wheel is attached to the wheel to give even more stability to the 2 3L pins that connect the assembly to the wheel.
GoldCivetta posted a topic in LEGO Technic, Mindstorms & Model TeamI was wondering if these parts: Could connect with this part: I want to know if we can use these wheel hubs for smaller wheels that don't have those 3-pin connections, such as these:
Hrafn posted a topic in LEGO Technic, Mindstorms & Model TeamWith the hubless wheel post in the back of my mind and some 56x28 ZR Street tires on my table next to some old-style track links, something clicked in my head. 22 of the track links fit perfectly in the 56x28 tires. More interestingly, if you put 4L tiles or plates on alternating links, they also fit the inside of the Unimog tire. Of course you'll need more than 22 - probably between 40 and 50 - to fill the Unimog tire. The tracks can be driven by spur gears, so you could make a planetary reduction hub which could also be a portal hub. I don't plan to make any large trucks any time soon, but figured I'd post this in case it's useful to those who build trial trucks and other large vehicles.
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