Tyre Rubber I-S25 22x12 Racing (shore 25)

Scaleauto I-S25 22x12 Racing Rubber Tyres (shore 25): grip and precision at the service of competition

Tyres are, along with the guide and the motor, one of the three main factors that determine the actual behaviour of a slot car on track. Choosing them well makes the difference between running smoothly or losing tenths in every corner. The Scaleauto SC-4754 are I-S25 rubber tyres in size 22x12 with a hardness of shore 25, specifically oriented for Racing use.

Features and Function

• Size 22x12: diameter of 22 mm and width of 12 mm, a common combination in wide-bodied competition cars with rear-wheel drive.
• Shore 25: low-medium hardness rubber, which translates into good deformation under load and a larger contact surface with the track, especially beneficial on Sport rail surfaces like those from Scaleauto or Slot.it.
• I-S25 Compound: formulated by Scaleauto to provide predictable response in acceleration and braking, without the excessive "squish" of overly soft rubbers.
• Racing Use: designed for competitive environments, where consistency from lap to lap is as important as maximum grip.

Track Behaviour

A shore 25 hardness places these tyres in the range of compounds with good bite without sacrificing durability. On Sport rail tracks, where surfaces tend to be more abrasive than in other systems, this balance is particularly valuable: the tyre gives just enough to adapt to irregularities without wearing out rapidly.

The size 22x12 provides stability in fast corners and allows maintaining the racing line even at high speeds, as long as the tyres are correctly mounted and trued if the application requires it.

Compatibility and Mounting

These tyres are designed for slot cars that use a rim size compatible with the 22x12 profile. Before mounting them, it is advisable to check that the inner diameter of the tyre fits correctly on the rim of the specific model to avoid stresses that alter the geometry and, therefore, the behaviour.

If the car is to be used in regulated competition, we recommend checking the championship regulations regarding permitted sizes and compounds.

Preparation Recommendations

• Always true the tyres after mounting to ensure perfect concentricity and eliminate vibrations at high speed.
• Clean the tread surface before the session to remove dust or silicone residues that reduce grip.
• Store in a cool place away from direct light to preserve the compound.

Frequently Asked Questions

What does the shore 25 value mean in a slot tyre?

The shore indicates the hardness of the rubber compound. The lower the number, the softer the tyre and the greater its deformation under load. A shore 25 offers good grip without reaching the extremes of an ultra-absorbent compound, making it versatile for regular competition.

Are they suitable for any type of track?

They are optimised for Sport rail (Scaleauto, Slot.it), although they can work on other systems compatible with the size. Performance may vary depending on the abrasiveness and condition of the surface.

Is it necessary to true them before use?

In recreational use, it is not strictly mandatory, but in competition, it is highly recommended to true the tyres after mounting to ensure concentricity and eliminate any vibrations that affect the car's behaviour.

How many tyres are included in the SC-4754 set?

The available information does not specify the exact contents of the set. Please check the product sheet or contact Ministry of Hobby before placing your order if this information is relevant to your application.

Can I use them on a sidewinder powered car?

Yes. The choice of tyre is independent of the type of motorisation (sidewinder, inline or anglewinder). What matters is that the size 22x12 is compatible with the car's rim.

Scaleauto I-S25 22x12 Racing tyres in shore 25 compound — reference SC-4754 — are a reliable choice for slot car competitors looking for consistent grip and lap-to-lap performance on Sport-rail tracks. Designed for racing use, these rubber tyres balance softness and durability, making them a go-to option for club-level and home-circuit enthusiasts seeking an edge in tyre preparation and setup.