MB braid in a 1 metre roll, super fine tinned

Electrical contact without compromises: Sigma's super fine tinned braid in 1 metre format

The braid MB-08031 from Sigma is one of those small details that makes a real difference on track. Made from tinned copper and with an extraordinarily fine profile, it allows the guide to work at the minimum possible height above the rail, something that the most demanding preparers know directly influences the car's stability and the continuity of electrical contact.

Function and performance

The main function of a braid is to conduct current from the rail to the car's motor. The better that conduction is —and the less it mechanically interferes with the guide's movement— the cleaner and more consistent the vehicle's performance on track will be.

• Tinned treatment: protects the copper from oxidation, maintaining stable conductivity during long training sessions or endurance races.
• Super fine profile: reduces the overall thickness under the guide, allowing the car's nose to be lowered to a minimum without the braids generating friction or "bouncing" on the rail.
• 1 metre of material: generous length that allows cutting to size according to the type of guide used, without wasting material.

Compatibility and installation

Thanks to its universal profile, this braid is suitable for most guides on the market, both screw and clip types. It can be cut with scissors or a cutter with precision, making installation easier even in more delicate setups. It is especially valued in preparations on high-demand wooden and plastic tracks, where electrical contact must be impeccable at all times.

If you prepare cars for club competition or simply want to maximise the performance of your slot at home, renewing the braids with quality material like this is one of the simplest and most effective steps you can take.

Installation and preparation

• Cut the necessary length according to your car's guide.
• Ensure that the braids are well seated in the guide's slots and without folds that could alter the contact.
• Check that the end soldered to the motor is well secured to avoid micro-cuts during the race.
• Periodically check the condition of the braids, especially after long sessions or on tracks with a lot of accumulated graphite.

Common mistakes

• Leaving the braids too long: causes excessive friction and can raise the guide, affecting steering.
• Not cleaning the rail before replacing them: accumulated dirt can reduce conductivity even with new braids.
• Bending or twisting the material during installation: the fine profile is an advantage, but requires careful handling to avoid damaging the fibres.

Frequently asked questions

How much braid do I need to prepare a slot car?

It depends on the type of guide, but usually around 4-6 cm per braid is sufficient. With 1 metre of material, you can prepare several guides or have stock for successive replacements.

What advantage does tinned braid offer over pure copper?

Tinning protects the copper from environmental oxidation and heat generated during use, which prolongs the lifespan of the braid and maintains more stable conductivity over time.

Is it compatible with any type of guide?

Yes, the super fine profile of the MB-08031 adapts to most guides on the market, both screw and clip types. It is compatible with universal rail tracks (Scalextric, Ninco) and Sport rail (Scaleauto, Slot.it), as its function depends on the car's guide, not the track system.

How often should the braids be changed?

There is no fixed rule, but it is advisable to inspect them after each competition session and replace them when they show deformation, loss of contact, or visible signs of wear. In club-prepared cars, many drivers change them before each important race.

Can this braid be soldered?

Yes. The tinned treatment actually facilitates soldering, as the tin acts as a natural flux and improves the adhesion of the solder joint to the motor wire.

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