4 DONUT tyres 25x11

DONUT 25X11 Tyres: Four Units to Keep Your Slot Car in Top Shape

The tyre is one of the elements that most influences the actual behaviour of a slot car. No matter how well-prepared the chassis or how balanced the motor is, if the rubber does not transfer power well to the track, performance suffers. The DONUT 25X11 tyres (ref. CXM099) come in a pack of 4 units so you can equip the rear axle and always have a spare pair on hand.

Function and Performance

The size 25X11 defines the outer diameter and width of the tyre, two parameters that directly affect track contact, ride height, and cornering response. A well-sized tyre for the rim and chassis of your car ensures:

• An even load distribution across the contact patch.
• Constant traction without excessive slipping on corner exits.
• A predictable behaviour on both plastic tracks and wooden or urethane circuits.

The donut shape —closed toroidal profile— is characteristic of replacement tyres for slot: it facilitates mounting on the rim without the need for special tools and provides a uniform contact patch once mounted and turned down if the user decides to adjust the final diameter.

Installation and Preparation

The installation process is straightforward:

1. Remove the worn tyres from the rim.
2. Slide the new DONUT 25X11 tyre onto the rim, ensuring it is centred and not twisted.
3. If you seek a precision fit, you can lightly turn down the tyre mounted on the axle to achieve the exact diameter you need and eliminate any possible eccentricity.
4. Apply a thin layer of contact adhesive specifically for slot tyres if the rim requires it, and allow it to dry before putting the car on track.

Turning down, although optional, makes a noticeable difference in competition: it reduces vibrations and improves grip by eliminating surface irregularities from the new tyre.

Compatibility

To confirm that the size 25X11 is correct for your car and rims, we recommend checking the specifications from the vehicle manufacturer or consulting the technical sheet of your chassis. By purchasing 4 units, you have enough material to fully equip the rear axle and keep a pair as an immediate spare.

Ideal for…

• Enthusiasts who want to keep their car in optimal condition without having to make large orders.
• Club competitors who need spare tyres on hand for race days.
• Preparers looking for a reliable starting point before custom turning.

Frequently Asked Questions

How many tyres are included in the pack?

The CXM099 pack includes 4 DONUT 25X11 tyres, sufficient to equip the rear axle of a car and have an additional pair in reserve.

What does the size 25X11 mean?

The first number (25) indicates the outer diameter of the tyre in millimetres, and the second (11) corresponds to the width. Always check that these dimensions are compatible with your car's rims before installing them.

Is it necessary to turn down the tyres before using them?

It is not mandatory, but it is highly recommended if you are looking for maximum performance, especially in competition. Turning down eliminates eccentricities and ensures a perfectly uniform contact patch.

What type of adhesive is used to fix them to the rim?

The most common practice is to use a contact adhesive specifically for slot tyres, applied in a very thin layer on the rim. Avoid excess to prevent unbalancing the assembly.

Can I use these tyres on both plastic and wooden tracks?

Yes, as long as the size is compatible with your car. The behaviour may vary depending on the type of surface, so it is advisable to always perform a few warm-up laps to allow the tyre to reach its optimal working temperature.

The DONUT 25X11 tyres (ref. CXM099) are a 4-unit pack designed for slot car enthusiasts looking for reliable grip and consistent performance on track. Whether you race on plastic, wood or urethane circuits, these replacement tyres offer a straightforward fit and a solid contact patch that translates directly into better cornering and traction. Compatible with a wide range of slot car wheels in the 25X11 size, they are a practical choice for club racers, hobbyists and builders who want to keep their cars performing at their best without downtime.