![]() ![]() We heard the suggestions for exact sizes in millimeters and also pondered the problem of "what to do with the sizes in between?"įor the naming convention, the. Now to get to what myself feel is the final version of this chart. This fits the original design pattern from Big Ben Bricks. The 7750 wheels are "M" sized as they are not quite big enough but the centers are mounted 1 plate higher than the other wheels of the time. The actual wheels from 2820cc02 are just under 17mm but are still "S" sized. The sizes in the chart are the "nominal" sizes. They are essentially the same design and diameter that has carried through to the current wheel designs. Holidays put a hold on my LEGO time.įor all of these wheels, except the 7750 wheels, would call those "S" sized. I took all these measures since I'm attempting to 3D print those partsįirst off sorry for the late reply. But the smaller size is due to the fact that they needed to accomodate the rubber traction band, that brings them again to a diameter of 17mm. ![]() The 12v and 4,5v wheels have a smaller flange than wagon wheels and are a bit smaller than old "traction" wheels. Wheels used on wagons of Gray Era - Wheel 16mm (5 plates) / Flange 22.4mm (7 plates)ħ750 wheels - Wheel 22mm (around 7plates) / Flange 28.8 (9 plates) Wheels used on wagons of Blue era (same as motor ones,flat wheels) - Wheel 16mm (5 plates) / Flange 22.4mm (7 plates) Since it could become a comprehensive list of all possible lego wheels sizes, it would be nice in my opinion to insert also older parts sizes, just for reference.įor what I could measure with my hand tool and simple Lego plates, these are the sizes:ġ2v (mounted on 7865 motor) cone wheels ( MS?) - Outer cone 16mm (5 plates) / Inner cone 15mm / Flange 21,4mm (around 7 plates) - the rod hole center is around 6mm from axle centerĤ,5v (mounted on 107 motor) cone wheels ( MS?) - Outer cone 16mm (5 plates) / Inner cone 15mm / Flange 21,4mm (around 7 plates)Ĥ,5v flat traction wheels (used on older 100 motors to grip on rails) - Wheel 17mm (around 5 plates) / Flange 22.4mm (7 plates) I will propose this change to those that helped ideate it and will likely be back with an updated chart.Ī nice work! I think is a good idea matching the real Lego part name to the new identifier. Then the wheel sizes beyond this chart, which, to me, would not make sense as they do not fit in the "system" but there are new and creative possibilities with 3D printers becoming less costly every day. 5 in the size is intuitive to me but may not be for someone new. I hadnt considered this point because as one of the creators the. The wheel sellers (and rod makers) can then talk about a "9.5 plate diameter wheel," in their product listings and everyone is a little more knowledgeable.Īs a result, if integers represented half plate diameters in this naming scheme at some point someone will then introduce a 9.5 wheel that is actually 10 plates in diameter (or worse, some random number between 9.5 and 10.5) and completely undermine the clarity objective. The advanced builders can then talk about a 9.5 wheel. If we go with integer names for the wheels it will quickly lose the connection to the number of plates, it will be clearer as to which size is larger than another (better than XLL), but still not clear as to why.Īs a result, if integers represented half plate diameters in this naming scheme at some point someone will then introduce a 9.5 wheel that is actually 10 plates in diameter (or worse, some random number between 9.5 and 10.5) and completely undermine the clarity objective. the context would have been lost, especially if we called them an even more abbreviated #4, #5. If we just called them a "40 curve", "56 curve", etc. As a community we've settled into R40.R120 and beyond for curves because it makes intuitive sense. More importantly, the language that develops around the wheel names keeps the connection to the plates (again, the verbose "plate diameter"). That way the name has a direct explicit meaning and as a newbe you do not have to learn that you need to add. ![]() 5, so L would become "9.5" and the more verbose version would be "9.5 plate diameter". Naming the wheels accordingly to their actual diameter brings clarity and efficiency to their name. With the current naming I never really spent much time thinking about the diameter of the wheels, just the stud spacing necessary for a given size (stepping up by half studs every so often). ![]() I like the general idea, but there is a level of secret-language if you use N to represent N.5. ![]()
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