F1 ProSpeed Soft Tyres

Soft rubber for those who measure every tenth on track

The F1 ProSpeed Soft Tyres (ref. SWPS1S/F1) are a soft rubber proposal with a hardness of 18 Shore, designed to maximise contact with the track and provide the best possible grip on Formula 1 profile slot cars. When the difference between winning and missing the podium is measured in hundredths, the choice of tyre matters as much as any other adjustment to the car.

Main features

• Hardness 18 Shore: soft rubber compound that favours a large contact surface and superior traction, especially in fast corners and chicanes.
• F1 Profile: specifically designed for Formula 1 type slot cars, respecting the characteristic geometry of these bodies.
• Reference SWPS1S/F1: clear identification to facilitate restocking and inventory control in your preparation toolbox.

Behaviour and performance

A compound of 18 Shore is situated in the soft range of the usual spectrum in slot. This translates to a rubber that slightly yields under load, increasing the contact patch with the track asphalt and providing a more direct response on corner entry. The result is a driving experience that is closer to the limit, with less understeer and agile recovery on corner exit.

As a drawback typical of any soft compound, wear may be somewhat greater than in medium or hard options, so it is advisable to monitor the condition of the tyres during long sessions or multi-heat championships.

Mounting and preparation

Before mounting the tyres, it is recommended to check that the rim diameter is suitable for this F1 profile. Good centring and a light sanding with fine sandpaper —to equalise the diameter and eliminate mould imperfections— contribute to the tyre rolling without vibrations and maintaining uniform contact with the track around the circumference.

Ideal for…

• Club competitors looking to maximise grip on technical tracks with many curves.
• Preparers working on the setup of Formula 1 slot cars and needing to fine-tune the traction/wear balance.
• Enthusiasts wanting to achieve a real performance boost without a high investment.

Considerations

Soft compounds perform better when the track is at working temperature and with a medium-high level of grip. On very cold tracks or slippery surfaces, it may be interesting to combine this tyre with adjustments to the car's height and guide weight to compensate. If you are competing in endurance format or on very long tracks, consider alternating with a medium hardness compound to extend the tyre's lifespan.

Frequently asked questions

What does a hardness of 18 Shore mean in a slot tyre?

The Shore scale measures the rubber's resistance to deformation under pressure. The lower the value, the softer the rubber. An 18 Shore tyre is quite soft: it deforms easily when in contact with the track, which increases grip but also wear compared to harder compounds (25-35 Shore, for example).

Are they compatible with any Formula 1 slot car rim?

It depends on the diameter and width of the rim. The F1 profile of these tyres is designed for the standard rims of single-seater type slot cars, but it is always advisable to check the measurements before mounting to ensure a proper fit.

Do I need to treat the rubber before using it in competition?

For competition, most preparers recommend lightly sanding the tyre once mounted on the rim to equalise the diameter and remove the surface layer of the mould, which is usually harder. This favours immediate grip from the first laps.

How long do these tyres last under intensive use?

The lifespan depends on the type of track, ambient temperature, motor power, and driving style. Being a soft compound (18 Shore), wear is greater than with medium hardness rubbers. For long club sessions, it is advisable to check the condition of the tyres between heats and have spare units on hand.

Can I use them on wooden and plastic tracks?

Yes, although the behaviour varies. On wooden tracks, they usually offer very noticeable grip. On plastic tracks (Scalextric, Ninco…), the level of adhesion is also high, but it may be advisable to adjust the controller's electronics to avoid sudden jerks with so much grip available.

The F1 ProSpeed Soft slot car tyres (18 Shore) are a premium soft compound option for Formula 1 scale slot cars, delivering outstanding grip and consistent performance on both wooden and plastic tracks. Whether you're tuning for club racing or optimising your setup for maximum lap times, these low-Shore tyres provide the traction advantage that serious slot car racers demand. Available at Ministry of Hobby, your specialist for slot car parts, tyres, and preparation tools.