Fabia R5/Rally2 SCA Chassis (PW-BL)

The 3DSRP SRP-PW101BL chassis from 3DSRP is the reference piece for those looking to maximise a Skoda Fabia R5 or Rally2 bodyshell on a rally slot track.

Within the 3DSRP spare parts and accessories catalogue in the 3D chassis, fibre and metal category, the PW-BL line represents the natural evolution towards a tighter motor geometry. The result is a more compact assembly, with better weight distribution and a more direct response in both traction and cornering.

Manufacturing and Technology

The chassis is manufactured using 3D printing with FDM (Fused Deposition Modeling) technology, allowing for precise and repeatable geometries that would be difficult or unfeasible with traditional methods. The PW-BL line incorporates a tighter motor angle, a design decision that directly impacts two critical aspects for rally slot:

• Increased traction efficiency: the drive shaft operates with less power loss by reducing the power transfer angle.
• Better cornering: by lowering the motor's working point, the centre of gravity decreases and the car gains lateral stability on technical tracks.

Compatibility

This chassis is designed exclusively for the Skoda Fabia R5 and Rally2 bodyshells in 1/32 scale. Always check that the bodyshell you have corresponds to these versions before mounting, as small differences between variants can affect the fit of the mounts.

Assembly and Preparation

For correct assembly and to get the most out of the chassis, 3DSRP recommends the following components:

• Crown gear: NSR 17.5 mm.
• Bearing: single-lip Sloting Plus.
• Pinions: metal.
• Motor mounting screws: M2 × 4 mm from 3DSRP.

Following these recommendations ensures that the design tolerances of the chassis are respected and that the mechanical assembly operates within the parameters for which it was conceived.

Common Mistakes When Assembling 3D Printed Chassis

• Over-tightening motor screws: the FDM material has a defined tightening tolerance. Excessive torque can create micro-cracks in the housings.
• Using plastic pinions: with the inherent rigidity of this chassis, metal pinions transmit power better and last longer.
• Not checking rear axle alignment: before closing, always check that the axle spins freely and that the crown engages correctly with the chosen pinion.

Frequently Asked Questions

What differentiates the PW-BL line from other 3DSRP chassis?

The main difference is the motor position angle, which is tighter in the PW-BL line. This translates into a more efficient transmission and a slight lowering of the centre of gravity, with clear benefits in traction and corner stability.

Is it compatible with any Skoda Fabia slot bodyshell?

The chassis is specifically designed for the R5 and Rally2 versions in 1/32 scale. Other versions or different scales are not accounted for in the design and may not fit correctly.

Can I use any crown gear or must I stick to the recommended one?

3DSRP recommends the NSR 17.5 mm crown gear. Using other sizes or brands may work, but you might not fully utilise the transmission geometry for which the chassis is optimised. Always start with the official recommendation before experimenting.

Does the chassis include any mechanical components or is it sold as just the structure?

The chassis is sold as a structure. Mechanical components (crown gear, bearings, pinions, screws) must be purchased separately. Please refer to the assembly recommendations indicated above.

Is it suitable for club racing or just for recreational use?

Its design focused on traction efficiency and cornering makes it perfectly valid for club racing in the rally slot category. The repeatability of FDM manufacturing ensures that each unit responds consistently.

Do I need special tools to assemble it?

No special tools are required beyond the usual ones for slot preparation: a suitable screwdriver for M2 screws, fine-tipped pliers, and a caliper if you want to check axle clearance. A clean assembly without forcing the material is sufficient.

The 3DSRP SRP-PW101BL chassis is a high-performance 3D-printed FDM slot car chassis for the Skoda Fabia R5 and Rally2 bodyshells in 1/32 scale. Part of the PW-BL line, its narrow motor angle delivers improved traction efficiency and cornering stability, making it a top choice for rally slot competition. Compatible with NSR 17.5 mm crown, Sloting Plus single-lip bearing, and metal pinions. Ideal for club racers and slot car enthusiasts looking for a precise, consistent and lightweight chassis solution.