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12 votes

What does "all wheel drive" actually mean in the Land Rover Defender set?

The "all wheel drive" phrase is used to represent a fact the model has a real life-like feature, I guess. Yes, it may not have the motor to provide the power to the wheels. But it has the ...
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10 votes
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9398 4x4 Crawler front wheels rotate in the opposite direction to the rear wheel

Likely you'll have the differential gears oriented wrong in the front or back section. The differential gear is this piece: Please check the instructions carefully and see if the orientation of ...
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9 votes
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Smallest rubber wheel that can be turned by a technic axle

I think the smallest one in diameter is the tire 3641 with the bush 4265c. Alternatively, you can use the tire 3139 which has a smooth surface and also compatible (but a little bit loosely) with ...
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7 votes
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Robot that builds a copy of itself

This seems pretty much bordering on the impossible, given the current state of (LEGO) engineering capabilities. What you are describing is a Von Neumann Machine and as far as I know nobody succeeded ...
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7 votes

Is it possible to create your own wheel?

You can always brick-build a wheel. The curved slope pieces can closely approximate a circle. For example, 12 4x1 curved slopes gives a circle with a radius of 160 LDUs (8 studs). For more ...
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  • 2,160
7 votes

What is the best way to store LEGO rubber tires?

I can't speak to "best". But as a point of reference, many many of my lego tires are many years old and they are usually stored on rims. The older tires were often not removable from the rims. As I ...
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7 votes

Separate LEGO Technic wheel from 3 pin hub

The main trick is to simultaneously push all three pins of the hub: If you have another hub, and the wheel allows for this, take it and push carefully from the other side. If both hubs are half-way ...
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  • 2,154
7 votes

What does "all wheel drive" actually mean in the Land Rover Defender set?

Alex has given a great answer to your "what does "all wheel drive" means?" question, I'll attempt to answer the next one: What about other sets like Jeep Wrangler, Monster Jam ...
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6 votes
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How can I extract a metal axle from a plastic wheel without damaging them?

From accidentally destroying some older wheels (decades on a sunny windowsill can make red parts brittle), I think you're out of luck. The ends of the metal axles I've seen have had splines formed ...
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  • 555
6 votes

Looking for a big set of tires and rims for my monster truck - really beefy tires

You may want to check Sariel's Wheels chart. This table contains all essential details like dimensions of the wheel and rim as well as weight and how rare they are.
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6 votes
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What is the name of the small pins that are used with small wheels / rims?

LEGO and others sometimes calls those pieces a "bearing element". This term however is not limited to just that axle. LEGO's replacement parts service calls the holes they go into "HOLE Ø11" (...
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6 votes
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Are there any wheels or rings that fit in pin clips?

The small Technic Steering Wheel and what I think is this rubber belt connect to clips:
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  • 2,154
5 votes

Can You Identify These Black Studless 2x4 Brick With Train Wheels?

Hey, there Happy Dog! These train pieces? Part #BB37 - Train Brick 2 x 4 x 1 1/3 Sliding Block with Wheels Holder. Part #Wheel2A - Wheel Spoked for Motor. Together they appear in these LEGO sets. ...
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  • 8,658
5 votes

What is the best way to store LEGO rubber tires?

Should they be stored with or without rims inside? I cannot say for sure whether storing tyres with or without the rims connected affects the lifespan. In my experience it hasn't made any noticeable ...
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  • 17.3k
5 votes

What is the biggest LEGO-compatible one piece wheel?

Pretty sure it's Hailfire Droid Wheel.
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  • 3,189
5 votes
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Any way to create a gear+chain, like for a bike?

It looks like LEGO sells chain and sprockets, don't know if you'd have them lying around though. You could also try using pulleys instead. If you don't have any of the actual pulleys, take the tread ...
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4 votes

Turn a tank a specific number of degrees

The math you're suggesting may work for going straight forward or backward where slipping is limited. For a turn, it will not come close. Even getting the center of rotation of the turning robot ...
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  • 1,311
4 votes

Any way to create a gear+chain, like for a bike?

The Technic Riding Cycle theme features several bikes that may be of inspiration. One particular set Moto Cross Bike (42007) uses several 3711: Technic, Link Chain parts to make a chain. Based on ...
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4 votes
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Which parts can I use to connect a cross axle to a car body?

You don't give many details, but there are cross-axle to round-axle pegs available, or you can put the cross-axle through a round-axle brick.
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  • 2,018
4 votes

Help identify large white wheels

What you have there is a 6118 Wheel Hard Plastic Small (22mm D. x 24mm), and this wheel is pretty common, it features in 39 sets, but luckily for you only in 4 sets in the color White. These sets are: ...
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  • 16.5k
4 votes
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When using pi * distance between wheels/tracks, how do I measure distance between wheels?

This formula will need the lateral distance between wheels, i.e. the distance between left and right wheel, not the back and front wheel. motor_pair.move(8.1 * math.pi / 2, 'cm', steering=100) The ...
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  • 156
3 votes

Smallest rubber wheel that can be turned by a technic axle

While it is technically not a rubber wheel, you can use an axle with a half-bush and with an additional rubber band to provide grip. Tensioning the band between two such axles will form a short ...
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  • 13.8k
3 votes

Technic Firetruck 8289 with different wheels?

The instructions show and Brickset lists 4496197: Rim Wide W.Cross 30/20 as the wheel rim of choice, which fits with the release year of the Fire Truck (2006) and the manufacturing dates of the rims (...
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3 votes

Should I store greasy tires separately?

I really expected someone with chemistry leanings to explain to us what was "migrating" out of the rubber with time or temperature, to make them "greasy"...much like cocoa butter will migrate outside ...
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3 votes

What are the largest Technic-compatible tires on the market?

I personally have the Lego Group 62.4 x 20 S tires which came with the Lego Creator 7291 2-in-1 Motorcycle kit.
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2 votes

Turn a tank a specific number of degrees

A 360 degree turn takes: (width of robot/circumference of wheel) turns, neglecting track thickness, assuming the tracks are at sides if the robot. The length of track doesn't matter. Your robots non-...
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2 votes

What are the largest Technic-compatible tires on the market?

Answer to this question is no longer entirely accurate, the power puller wheel https://www.bricklink.com/v2/catalog/catalogitem.page?P=32298 has been superseded in diameter by the tractor wheel https:...
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2 votes

Which wheels are suitable for Power Functions M-Motor

The M-motor is directly compatible with almost all the wheels that LEGO has produced, and, with a little building, compatible with every wheel imaginable, even brick-built wheels. If your problem is ...
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  • 2,160
2 votes
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Buy new lego tires/tyres and treads

LEGO’s Pick-a-Brick service has only a limited amount of the total range of pieces ever produced. It contains a subset of the pieces available in current sets. The Bricks and Pieces service (on the ...
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  • 16.5k
2 votes
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Separate LEGO Technic wheel from 3 pin hub

Just wanted to elaborate on the answer by Wrzlprmft. The first thing that went through my mind was, "What is this configuration where the Hub is snapped into a wheel but not into the Portal Axle ...
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