CLASSIC REAR 21 x 11 SUPERGRIP

Traction from the first metre: the NSR Classic Rear 21x11 Supergrip tyre

In slot racing, tyres are the only point of contact between the car and the track, and their choice affects everything else: braking, acceleration, cornering response. NSR knows this well, which is why its Supergrip range has become a regular reference in competition clubs and preparation tables worldwide.

The NSR Classic Rear 21x11 Supergrip (reference NSR5241) is a rear tyre with a diameter of 21 mm and a width of 11 mm, designed for Classic setups — that is, straight axle profiles — in 1/32 scale slot cars.

Main features

• Size: 21 mm diameter × 11 mm width.
• Type: Rear, Classic profile (for straight axle wheels).
• Compound: Supergrip, high-adhesion formulation developed by NSR.
• Scale: 1/32.
• Reference: NSR5241.

Function and performance

The NSR Supergrip compound is formulated to provide high grip from the very first moment, without the need for a prolonged break-in period. The rubber maintains its performance consistently throughout the session, which is particularly valuable in competition, where lap time homogeneity makes a difference.

The Classic profile is sized to fit correctly on the rear wheels of straight axles in the NSR range, ensuring precise centring and avoiding vibrations that could affect chassis stability.

Compatibility

This tyre is designed for use with NSR Classic profile rear wheels in 1/32 scale. Always check that the inner diameter of the wheel matches the tyre size to ensure a proper fit before mounting. NSR offers a wide catalogue of compatible wheels, making it easy to combine this tyre with different chassis configurations.

Mounting and preparation

For optimal mounting, it is recommended to clean the wheel with isopropyl alcohol before fitting the tyre, removing any grease or dirt that could compromise the grip between the two parts. Once mounted, a light turning or grinding ensures perfect concentricity, which in competition translates directly into smooth running and more consistent lap times.

If you are going to use the car in club races, be aware of your category's regulations regarding the use of Supergrip compounds, as some classes restrict the type of tyre allowed.

Common mistakes

• Mounting the tyre on a wheel of incorrect diameter: causes eccentricity and vibrations.
• Not grinding after mounting: small variations in concentricity penalise stability.
• Using silicone or lubricants near the tyre: degrade the compound and reduce grip.

Frequently asked questions

How many units are included in the NSR5241 package?

We do not have official confirmation on the exact number of units per package at this time. We recommend checking the product sheet in-store or contacting our team to clarify before placing your order.

Is the Supergrip compound suitable for any type of track?

The Supergrip compound performs well on both plastic tracks (Scalextric, Ninco) and wooden or resin tracks. On very abrasive surfaces, it may wear out slightly faster, but the grip performance remains high throughout the tyre's lifespan.

Do I need to grind the tyre after mounting it?

It is not strictly necessary for recreational use, but it is highly recommended for competition. Grinding eliminates any concentricity deviation and ensures that the tyre rolls perfectly flat, improving stability and lap time consistency.

Which NSR wheels is this tyre compatible with?

It is compatible with NSR Classic profile rear wheels in 1/32 scale that accept the size 21x11. Check the NSR wheel catalogue to identify the exact reference that best fits your chassis and axle configuration.

Can I use this tyre in official competition?

It depends on the regulations of each championship or club. The Supergrip compound is widely accepted, but it is always advisable to check with the organiser if it is permitted in your specific category.

The NSR Classic Rear 21x11 Supergrip tyre (NSR5241) is a high-grip rear tyre for 1/32 slot car racing, featuring NSR's Supergrip compound for consistent traction and lap times. Ideal for Classic axle setups, it suits both club competition and recreational driving on plastic, wood or resin tracks. A trusted choice among slot car enthusiasts looking for reliable rear grip in NSR-based builds.

Information not found

It has not been possible to confirm with official sources the exact number of units per package or the recommended inner diameter of the wheel for this specific tyre. If you need this information before your purchase, please contact our team at Ministry of Hobby.