An assortment of 1992 chassis (top right, bottom right, and left)
- When first made, chassis were simple and had staples at the bottom, likely due to the nascence of the brand and its manufacturing practices
- This type of chassis was phased out during 1994 when the succeeding type came into usage. As a result, some 1994 examples of items used either type
- The stapled bottoms were removed and replaced with non-stapled bottoms
- This type of chassis was introduced while the preceding type was retired. As a result, some examples of 1994 often used either type
- Some models dated 1999 have names in "Western" font.
- Vehicle names added
- Names rewritten to a more bolded format.
- Engines or rolling stock with multiple bogies (with the exceptions of Frieda and Vinnie) refitted with plastic chassis, likely to cut production costs
- Magnets are directly embedded into the chassis.
- Single bogie engines, rolling stock, and tenders still use wooden chassis, with a plastic strip placed into the top in order to hold the magnets and secure the model to the base. The magnet housing is now a duller matte plastic, as opposed to the glossy plastic used before.
- All chassis from this year forward are unpainted, except for certain models which have plastic ones.
- Multiple-bogie chassis are no longer produced. All characters have the same set length with either four or six wheels. Tender chassis remain the same.
There are four basic types of chassis:
- Stapled Bottoms (discontinued)
- Non-Stapled Bottoms (discontinued)
- Non-Stapled Bottoms, Names (active only on non-bogie engines)
- Non-Stapled Plastic Bottoms, Names (active)
Chassis have two different bogie configurations:
- Without bogies (4-6 wheel vehicles)
- With bogies (8 wheel vehicles)