Zero Grainig tyres 20.5 x 11 rim 17 x 4 pcs

NSR Zero Graining Tyres: 1/32 rear replacement to maintain performance session after session

Tyres are one of the most critical consumables in competitive slot racing. A worn or out-of-spec set can ruin all the preparation work done on the chassis, while tyres in good condition —correctly mounted and trued— make the difference between a car that grips accurately and one that slides through every chicane. The reference NSR5230Z includes four units of NSR's Zero Graining tyres in size 20.5 x 11 for 17 wheel, ready to replace the originals and restore the grip level the car had when it left the factory.

Function and Performance

The NSR Zero Graining design aims to minimise the graining effect —the formation of small surface irregularities that appear on the tyre when working at high temperatures or with an unsuitable compound for track conditions—. The result is a more uniform contact surface throughout the tyre's lifespan, translating into more predictable and consistent grip, especially during long sessions or on high-speed tracks.

The size 20.5 x 11 mm fits a 17 mm wheel, a common combination for 1/32 rear applications in the NSR range. The outer diameter directly affects the effective gear ratio: with the same motor and pinion, a larger tyre increases top speed but reduces acceleration, so it is advisable to always use the same reference to maintain the setup.

Compatibility

These tyres are designed for the 17 mm diameter rear wheels from the NSR catalogue. Before mounting, ensure that your chassis wheels match this size exactly: a difference of tenths can create stress on the tyre or prevent a proper fit on the wheel, compromising the balance of the assembly.

As a general reference, NSR tyres are optimised for plastic tracks of both universal rail (Scalextric, Ninco) and Sport rail (Scaleauto, Slot.it), although the final performance will always depend on the compound, ambient temperature, and track condition.

Mounting and Preparation

• Mounting on wheel: carefully place the tyre to ensure it is centred and free of lateral stress. A crooked mount generates vibration and loss of grip even with a new tyre.
• Truing: once mounted, it is highly recommended to true the tyre to achieve a perfectly uniform diameter around the circumference. This eliminates any small concentricity defects and maximises the contact surface.
• Compound treatment: depending on the type of track and conditions, a grip treatment may be applied. Always respect the regulations of the championship you are participating in, as some prohibit certain treatments.
• Periodic inspection: inspect the tyres after each intense session. Asymmetrical wear or visible graining are signs that it is time to replace them.

Common Mistakes

• Mounting tyres of incorrect size believing the difference is negligible: it affects transmission and cornering behaviour.
• Not truing after mounting: even if the tyre looks perfect at first glance, there is almost always a slight eccentricity that truing corrects.
• Mixing tyres of different references on the same axle: it creates imbalances and unpredictable behaviour.
• Forgetting that the pack includes 4 units: plan your spare stock based on the wear rate of your car and your type of use.

Frequently Asked Questions

How many units are included in this pack?

The NSR5230Z pack includes 4 Zero Graining tyres in size 20.5 x 11 for 17 mm wheel.

What position are they designed for, front or rear?

According to the catalogue category, they are rear replacements in 1/32 scale. Always check compatibility with your wheel before mounting them.

Is it necessary to true them after mounting?

It is not mandatory, but it is highly recommended for any minimally demanding use. Truing ensures a uniform diameter around the circumference and maximises contact with the track.

What types of track are they compatible with?

NSR tyres work on both universal rail tracks (Scalextric, Ninco) and Sport rail tracks (Scaleauto, Slot.it). The specific performance depends on the compound, temperature, and surface condition.

How often should they be changed?

It depends on use, track, and session intensity. The most practical approach is to visually inspect them after each long session and replace them as soon as asymmetrical wear, visible graining, or noticeable loss of grip appears.

Can I use these tyres on wheels from another brand?

As long as the wheel is 17 mm in diameter and the width is compatible, mounting is possible. However, NSR optimises its tyres for its own wheels, so the best results are obtained with the complete set from the same brand.

NSR Zero Graining 1/32 rear tyres, size 20.5 x 11 for 17 mm wheel, pack of 4 units — ref. NSR5230Z. Designed to deliver consistent grip and reduce graining effect on both universal-rail and Sport-rail plastic tracks. A reliable consumable choice for club racers and competitive slot car enthusiasts looking to maintain peak traction with genuine NSR replacement parts.