LEGO 42129 MB Zetros Foundry Sand Trials: Is this set playable or not?

[Kamil]

Some say Lego Zetros Trial Truck can only be played at home by using books as obstacles. To prove the opposite, a foundry sand track was built for Lego Zetros Trial Truck with bigger Lego wheels mounted on it. The truck completed the track. This set is playable on a sand track with variable road conditions.

Plus Sides:

Truck has enough power to be played with bigger wheels. 

The steerability of the truck is good on sand surfaces with bigger wheels. 

The speed of MB Zetros has increased by using bigger Lego tires. 

Rear differential-lock is useful for climbing slopes. 

Minus Sides:

Turning radius of MB Zetros is insufficient for narrow tracks.

Light rear end of MB Zetros causes problems whenever rear traction is needed. 

Front differential can not pull or push the vehicle under hard conditions. 

 

The trial video is here on Youtube:

 

I think, this set is still playable.

Thanks for watching.

 

[gyenesvi]

Well, I'm not sure I agree that this is what playability means. Sure, you can drive it on sand. But taking 12 minutes to complete such a track would get me really bored. And the fact that it is not really turning would get me irritated sooner.

Furthermore, on the capabilities of the set. The problem is that most of the technicalities in the set are useless gimmicks when it comes to trial and play. Take for instance the diff locks. In any practical RC trial truck there would be no diffs, all would be locked, saving a lot of gears and space, allowing for better ground clearance for example. Second, the suspension, it is practically not articulating too much. So, my guess would be that the truck would perform almost equally if you just ditched all the diffs and locks, and maybe even the whole suspension and just made it rigid, or one of the axles pendular. It would be interesting to see a comparison with those modifications in place.