SLICK MTX 64 tyre

The base compound of the MTX 64 range, the technical starting point for SRC in the development of competition tyres

The SLICK MTX 64 tyre represents the original compound on which SRC has built its entire family of MTX rear tyres. With dimensions of 17.6 x 10.3 mm and presented in a pack of 4 units, this tyre acts as a reference material: it is the foundation from which the brand develops and evaluates the behaviour of different hardnesses and wear levels in the rest of the range.

Technical characteristics

• Dimensions: 17.6 x 10.3 mm
• Type: Rear slick, wide section
• Compound: MTX 64, reference rubber base in the range
• Hardness: Soft in composition (on the SRC scale, 100 is the softest and 1 the hardest)
• Wear: Perfect, very balanced
• Units per pack: 4
• Reference: SRCRN0114

SRC hardness compound and scale

SRC works with its own hardness cataloguing system where the value 100 corresponds to the softest compound and 1 to the hardest. The MTX 64 occupies a soft position within that range, translating to greater initial grip and a generous contact patch with the track. This hardness approach is ideal when the track has lost much of its original texture and the surface friction coefficient is low.

As the reference compound of the range, understanding the behaviour of the MTX 64 makes it easier to interpret how the other variants of the family evolve: if you know this tyre, you have the compass to navigate the rest of the MTX catalogue.

Performance and applications

The MTX 64 is designed for rear section tyres, where power transmission to the rail and stability in corners are critical factors. Its slick profile maximises the contact surface, while the soft compound ensures grip even in unfavourable track conditions.

The wear described as "perfect" by SRC means that the rubber does not wear out quickly in the pursuit of grip: the balance between adhesion and lifespan is one of the hallmarks of this compound, something especially valued in long sessions or tournaments with multiple heats.

What type of track is it recommended for?

SRC specifically recommends the MTX 64 for tracks with eroded plastic grain. On surfaces where the natural grip of the track has decreased with use, a soft compound like the MTX 64 compensates for that loss of adhesion and maintains predictable car behaviour during braking and corner exit.

If your club has been running on the same track for a while and you notice that harder tyres are no longer performing as before, the MTX 64 is the natural candidate to regain sensations without resorting to extremely soft compounds that wear out in a few sessions.

Mounting and preparation

As with any competition tyre, before mounting the MTX 64, it is advisable to check the concentricity of the axle-wheel assembly with a runout gauge. An eccentric mounting negates much of the benefit of a good compound. A light sanding with fine sandpaper or a tyre lathe is also recommended to equalise the outer diameter and ensure uniform contact of all four tyres with the track.

Frequently asked questions

What does it mean that the MTX 64 is the "reference" compound of SRC?

SRC uses it as a technical starting point to develop and compare the other hardnesses and mixtures in the MTX range. It allows for objective evaluation of variations in wear and grip behaviour, as all other compounds are measured against it.

How many units does the pack include?

The SRCRN0114 pack includes 4 units of the MTX 64 rear tyre.

How do I interpret the SRC hardness scale?

In SRC's own scale, the value 100 corresponds to the softest compound and 1 to the hardest. The MTX 64 is positioned in the soft range, which implies greater grip but also greater sensitivity to track surface conditions.

What type of track is it especially indicated for?

SRC recommends it for tracks with eroded plastic grain, where the surface texture has lost bite with use and a soft compound is needed to compensate for that reduction in friction.

Is it compatible with standard slot wheels?

The MTX 64 is designed for rear section with dimensions of 17.6 x 10.3 mm. Check that your car's wheels accommodate that diameter and width before mounting. Do not assume compatibility: always verify with the manufacturer of the chassis or corresponding wheel.

Do I need to true the tyres before using them in competition?

In competition, a prior truing is recommended to equalise the outer diameter of all tyres and eliminate any possible eccentricities from the mounting. This optimises contact with the track and the performance of the compound.

The SRC SLICK MTX 64 rear tyre (ref. SRCRN0114) is the benchmark compound of the MTX range, measuring 17.6 x 10.3 mm and supplied in a pack of 4 units. Soft in compound, with excellent wear balance, it is specifically recommended for slot car tracks with worn plastic grain surface. Part of SRC's systematic approach to tyre hardness development, the MTX 64 is the ideal choice for club racers and hobbyists seeking consistent grip on aged or low-grip plastic track surfaces. Compatible with slot cars requiring rear section tyres in this size.