Although given the limited advantage of the metal axles in tests so far I think I'll hold off until the HDBricks sample pack arrives and I can test those. This would show if the independent wheels provide significant benefits on tight curves, and possibly if there is enough inertia to get across the lateral portion. These wheels were connected to a modified 2x4 brick and their running characteristics are much worse then the 9V train wheels. These wheels are the best ones in terms of running characteristics and came to market in 1991 with the new 9V train system. It looks like the "record train" in the video had about 4 9v train motors at the front, but it is still impressive given the forces they overcame.

The photos of the scales have had the display area curves blown out so you can actually read the display in the video. I suspect I need to 3D print some holders that have an exterior section like the Lego wheel holders do.As soon as you allow for "distributed power units" it simply becomes an unlimited number of short trains coupled together (doable with 9v but difficult, easily done with PF and PUP). These dummy wheels are needed if you build a long section of train wheels which should be able to run on curved LEGO train track. Guess what, you can even find discount vouchers, coupons and other money saving deals of lego train wheel on AliExpress. My cars are 7wide, the solution using technic bricks requires covering the wheels, but this will exceed 7wide.

This is because the two wheels turn the same speed (same rotation speed), but they need to run different distance on a curve (the outer longer, the inner shorter), so the outer wheel will be dragged or the inner slipped. The LEGO Group and Brick Train Depot are not responsible for any loss, injury, or damage from use or misuse of this product.For the metal axles I tried to get some into the axle hole on the wheel as well as on the axle where it goes through the holder.

We have a large range of commonly spaced rods that fit within the Technic system, perfect for replacing your brick built rods. LEGO ® is a trademark of the LEGO Group of companies which does not sponsor, authorize or endorse this site (www.I found some LEGO axles that can be assembled to MR52-2Z ball bearings without addtional tools, but after assembly the ball bearing still can move.