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2. Comparison of train and tram tracks - Wikipedia

   en.wikipedia.org/wiki/Comparison_of_train_and...

   Rail vehicle wheels are usually mounted on a solid axle, so they turn at the same speed. When a vehicle turns the outer wheel has to travel further than the inner wheel. On a road vehicle, this is usually achieved by allowing the wheels to move independently, and fixing the front wheels in an arrangement known as Ackermann steering geometry.

3. Hipster (1940s subculture) - Wikipedia

   en.wikipedia.org/wiki/Hipster_(1940s_subculture)

   In 1947, Gibson sought to clarify the switch in the record "It Ain't Hep" which musically describes the difference between the two terms. Initially, hipsters were usually middle-class European American youths seeking to emulate the lifestyle of the largely African-American jazz musicians they followed. [ 4 ]

4. Roller coaster wheel assembly - Wikipedia

   en.wikipedia.org/wiki/Roller_coaster_wheel_assembly

   They often consist of at least 3 wheels per assembly, but can contain more. The typical arrangement of the wheels are: Running wheels (also known as road wheels or tractor wheels): positioned on the top of the rail, bearing the weight of the train. Side friction wheels: positioned on a horizontal plane, either inside or outside of the rails ...

5. Rim (wheel) - Wikipedia

   en.wikipedia.org/wiki/Rim_(wheel)

   The disk is welded in place such that the center of the wheel is equal to the center of the hub. The distance between the centerline of the rim and the mounting plane of the wheel is called the "offset" and can be positive, negative, or zero. [14] One-piece rim and wheel assemblies (see image) may be obtained by casting or forging.

6. Wheel sizing - Wikipedia

   en.wikipedia.org/wiki/Wheel_sizing

   Wheels with Asanti 28 in (710 mm) rims on a police Hummer H2 car. The wheel size is the size designation of a wheel given by its diameter, width, and offset. The diameter of the wheel is the diameter of the cylindrical surface on which the tire bead rides. The width is the inside distance between the bead seat faces.

7. 4-6-4 - Wikipedia

   en.wikipedia.org/wiki/4-6-4

   Between 1947 and 1949, 33 Class C61 locomotives were rebuilt from former Class D51 2-8-2 Mikado freight locomotives. The Class C61 was the first Japanese locomotive with the 4-6-4 Hudson wheel arrangement. [25] In 1948 and 1949, 49 Class C62 locomotives were built with new 4-6-4 frames and using the boilers of Class D52 2-8-2 Mikado locomotives ...