TKM Ultimate K’NEX Train System – Classic Body (5+ Cars = Automatic 15% Discount)

(5+ Cars = Automatic 15% Discount)

The Classic Body is the standard and most versatile version of TKM’s Ultimate K’NEX Train System. It’s the ideal size for RMC, wooden coasters, and redesigned legacy V2 top designs, making it the best all-round option for most builders.

Designed to match traditional K’NEX train proportions, the Classic Body provides a strong, reliable foundation for both compact and large coaster builds — not too big, not too small.

This version is recommended for the majority of users and serves as the direct replacement for the original V2 Train System.

Classic Body – Overview

• Standard / original train size used across most K’NEX coaster builds

• Direct replacement for the V2 Train System, redesigned for long-term support

• Compatible with all previous V2 top designs using the included adapter plate

• Future Classic Body development will focus on wooden coaster and RMC-style designs

• Integrated eddy-current (magnetic) braking system for consistent, non-contact braking

• Designed as part of a modular, upgradeable ecosystem

What’s Included

Each order includes all required printed parts and hardware needed to assemble the train system.
Bearings are not included — please refer to the Bearings Information page for full compatibility details and recommended options.

Included Components

• Train bodies (per number of cars ordered)

• Wheel assemblies (Classic or Realistic (HD), depending on configuration selected)

• Eddy-current (magnetic) brake bars

• Zero-car / front-car sections

• All required screws, spacers, and mounting hardware

Brake Bars & Zero-Car Sections

The number of brake bars and zero-car sections included scales automatically with the total number of cars ordered:

1–3 cars ordered

• 1× brake bar

• 1× zero-car / front-car section

4–5 cars ordered

• 2× brake bars

• 2× zero-car / front-car sections

6+ cars ordered

• 3× brake bars

• 2× zero-car / front-car sections

Additional brake bars can be purchased separately for longer or multi-stage brake runs.

Realistic (HD) Wheel Assemblies

• Optional visual upgrade with increased realism and detail

• Replaces the included Classic wheel assemblies
  (only one wheel assembly type is included per train system)

• Can also be purchased separately as an upgrade pack at a later date

HD Assembly Details

• Includes wheel spacers for both 4 mm and 5 mm wide bearings

• Requires the following bearings:

  • 4× MR115 (5×11×4 mm) for bottom and side wheels
    (5 mm width versions are also compatible)

  • 2× 695 (5×13×4 mm) for the top running wheels

• Includes correctly sized brake bars and taller brake holders required for HD configurations

For Existing V2 Customers

• The axle bars and Classic wheel assemblies used in this system are the same as those from the original V2 Train System.
  Existing V2 customers looking to upgrade are encouraged to contact me via the contact form to arrange a personalised upgrade path based on the parts they already own.

• Front and middle train systems are no longer sold as separate products. This change has been made to reduce confusion and provide a more complete, consistent kit.

• All train system kits now include front-car components as standard.
  Orders of 4 cars or more also include the additional assemblies and screws required to support two front cars, where applicable.

This approach ensures clearer ordering, better compatibility, and a smoother upgrade experience for both new and existing customers.

Pricing Note

Selecting the Realistic (HD) wheel assembly upgrade when purchasing the train system offers a cost saving compared to buying the HD assemblies separately at a later date.
This saving is possible because the HD assemblies replace the included Classic assemblies, rather than both types being supplied when purchased separately.

Both Classic and Realistic (HD) wheel assemblies are also available separately in packs, allowing customers to change configurations without purchasing an entirely new train system.

Bearings (Important)

Bearings may also be supplied and installed if arranged directly; however, this can increase both shipping time and cost due to lead time for bearings, increased package weight, and higher declared order value.
For these reasons, bearings are not included by default, as in most cases the most affordable option is for customers to purchase and install their own.