Mitoos MXL z68 timing belt

Precise and Slip-Free Transmission with the Mitoos MXL z68 Toothed Belt

The CXM468 belt from Mitoos is a standard pitch MXL toothed belt with 68 teeth and 2 mm width, designed to transmit rotation between axles in slot car setups with maximum efficiency. Being an MXL pitch — the most widely used standard in precision miniaturised transmission — it fits perfectly with the entire family of Mitoos toothed pulleys.

Features and Function

• Standard MXL pitch: ensures compatibility and interchangeability within the Mitoos pulley ecosystem.
• 68 teeth: determines the total length of the belt and the transmission ratio between pulleys.
• 2 mm width: standard dimension of the Mitoos range, suitable for tight spaces in competition chassis.
• Slip-free: the toothed profile ensures that each motor rotation translates directly into axle movement, with no loss of traction or hysteresis.
• Quiet and low-maintenance transmission compared to direct gear solutions.

Verified Compatibilities

This belt has a validated fit by Mitoos with the following references of the brand's toothed pulleys:

• Plastic pulleys: references M136 to M140.
• Aluminium pulleys: references M143 to M149.

The combination of MXL belt with aluminium pulleys is particularly common in competition setups where minimising rotating mass is a priority.

Installation and Preparation

When installing the belt, check that the tension is appropriate: a belt that is too tight generates unnecessary friction in the bearings, while a loose belt may skip under sudden acceleration. A common trick among builders is to verify that, when pressing the belt laterally with a finger, it barely moves 1-2 mm. Keep the pulleys aligned in the same plane to avoid lateral wear on the teeth.

Ideal for…

• Slot car setups with toothed belt transmission in competition or semi-professional chassis.
• Builders seeking a clean transmission with no play between motor and rear axle.
• Replacement of worn belts in setups already using Mitoos pulleys from the M136-M149 range.

Considerations

Toothed belts are considered a consumable item: with use, the teeth wear down and the belt may lose tension. It is advisable to check their condition periodically, especially if abnormal vibration or loss of response in acceleration is noticed. Having a spare unit in the race kit is a good practice.

Frequently Asked Questions

What does MXL pitch mean in a toothed belt?

MXL is a standardised designation for miniaturised toothed belt pitch, with a tooth spacing of 2.032 mm. It is the most common standard in precision transmissions for slot cars and small machinery, making it easy to find compatible pulleys from various manufacturers.

How many teeth does this belt have and how does it affect installation?

It has 68 teeth, which determines its total length and, therefore, the distance between the centres of the pulleys it can connect. Before purchasing, it is advisable to verify that this axle distance in your chassis is compatible with a z68 belt.

Is it compatible with pulleys from other brands?

Being of standard MXL pitch, it can work with any MXL pulley of the same 2 mm width, regardless of the manufacturer. However, Mitoos guarantees optimal fit only with its own references M136-M149.

How often should the belt be changed?

It depends on usage and running conditions. In intense competition sessions, some builders check it every few races. A clear indicator of wear is loss of tension, the appearance of noise, or small visible cracks on the teeth.

Can I use this belt with both aluminium and plastic pulleys interchangeably?

Yes. The CXM468 belt is validated to work with both plastic (M136-M140) and aluminium (M143-M149) pulleys from Mitoos, without any need for adaptation.

The Mitoos MXL z68 toothed belt (ref. CXM468) is a precision MXL-pitch timing belt with 68 teeth and 2 mm width, designed for slot car drivetrains requiring reliable, slip-free power transmission between axles. Fully compatible with the complete range of Mitoos toothed pulleys — both plastic (M136–M140) and aluminium (M143–M149) — it is the go-to replacement belt for competitive slot builders and club racers looking for consistent performance and easy maintenance.