T1A Traction Pulley x2

Two T1A Traction Pulleys Ready to Keep Your 4×4 in Top Shape

The T1A Traction Pulley from SRC is a specific transmission spare part for slot cars with four-wheel drive. This pack includes 2 units, the exact amount for a complete review of the front or rear traction system without having to search for more parts.

Technical Features

• Contents: 2 x T1A traction pulleys
• Hub Length: 6 mm
• Pulley Diameter: 10 mm
• Pulley Wall: 0.5 mm
• Hub Diameter: 3.50 mm
• Pulley Interior with Erosion for better grip and belt transmission
• Application: 4×4 traction cars

Function and Performance

The pulley is the element that connects the motor's movement to the front axle in all-wheel drive systems. Wear or breakage in this part directly translates to loss of traction and irregular behaviour on track. Having quality spare parts —and keeping them on hand— is part of the job for any serious car preparer.

The eroded interior of the T1A improves contact with the transmission belt, reducing slippage and ensuring that power reaches all four contact points efficiently. The wall thickness of just 0.5 mm helps keep weight to a minimum, a significant factor in competition cars.

Compatibility

This spare part is designed for SRC models that incorporate a 4×4 traction system. Always check your car's manual or technical sheet before replacing the pulley, especially the hub diameter (3.50 mm) and length (6 mm), which are the critical parameters for proper fitting.

Installation and Preparation

Changing pulleys is a routine maintenance operation in competitive 4×4 cars. We recommend also checking the condition of the transmission belt each time you access this area of the chassis: simultaneous wear of both parts is common. If the belt shows slack or wear marks, replace it along with the pulley to ensure maximum efficiency in transmission.

Frequently Asked Questions

Does this pack include the transmission belt?

No. The SRCRM0903 pack includes only the 2 T1A traction pulleys. The transmission belt is sold separately.

Which SRC cars are these pulleys compatible with?

They are designed for SRC models with a 4×4 traction system. Check your car's manual or the manufacturer's technical sheet to confirm compatibility with the specified measurements (hub 3.50 mm, length 6 mm, pulley diameter 10 mm).

How often should pulleys be checked or replaced?

It depends on usage and track type. In regular competition cars, it is recommended to inspect them every few sessions. If the car loses front traction or you notice unusual vibrations, first check the pulley and the belt.

Can I install them myself or do I need a preparer?

The change is accessible for any enthusiast with some experience in slot car maintenance. Simply disassemble the chassis, access the transmission system, and replace the worn pulley. A pulley extraction tool greatly facilitates the task.

The SRC T1A Traction Pulley pack (ref. SRCRM0903) is a dedicated replacement part for 4WD slot cars, featuring a 10 mm pulley diameter, 6 mm hub length, 3.50 mm hub diameter, 0.5 mm wall thickness, and an eroded inner surface for improved belt grip. An essential maintenance component for competitive 4×4 slot car setups.