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SPCK chain kit concept - AllYoogs

Chain kit : our concept to improve performances

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THE CONCEPT AND BENEFITS OF OUR SPCK CHAIN KIT

  • The SPCK drivetrain kit is a definite advantage for young riders. In fact, our SPCK drivetrain brings a measured gain of between 2 and 2.4% on lap times, and makes it easier to learn to “start”, manuals… It’s currently the lightest on the market.
  • Lightweight chain with only 140g/m. No bicycle chain on the market is as light as the SPCK chain.
  • The narrowing of the chain pitch, allows for an equal development (ratio) to decrease:
    – the total length of the chain
    – the diameter of the front sprocket
    – the diameter of the rear sprocket.
    The SPCK chain kit allows a weight saving of 140 to 380g compared to a classic drivetrain.

Example: Conversion of a bike equipped with a semi-light chain and 38×16 transmission = weight reduction of 225g for an equivalent development (ratio). In this configuration, the gain is as important as fitting a carbon fork in place of a steel version but at a lower cost.

  • Less vibrations thanks to the weight reduction and the increase of the number of teeth on the front sprocket and rear sprocket (reduction of the polygonal effect and the winding angle on the rear sprocket). Its operation is similar to a belt but without the disadvantages (lower mechanical efficiency, imposed position of the rear wheel, elasticity…). Most riders note a reduction in effort for the same development. The mechanical efficiency is improved.
  • Since the height of the teeth is reduced, the risk of injury or tearing of clothing is reduced. The reduced overall size of the drivetrain also contributes to this.
  • The reduced pitch makes it possible to adjust the position of the rear wheel more precisely than with a conventional or half-link chain.
  • Reduction of rotating masses during pedalling.
  • The rear and front sprockets are CNC machined and made of 7075-T6 aluminium (71% stronger than 6061-T6) with hard anodising to increase durability.
  • The SPCK chain kit can be used on BMX Race bikes up to and including Expert size with a weight limit of 50kg.
  • The SPCK chain life is dimensioned to achieve the same wear as an adult with a standard chain and BMX Race use, a balance between performance and durability.
  • The reduced teeth height requires a little more attention to the chain tension, but if this is respected, there is no chain jump in extreme use.
  • The special dimensions of the SPCK chain require a front sprocket and a rear sprocket adapted to it. There is no compatibility with conventional drivetrains. 
 
 
 
 

 

Did you know?

The polygonal effect

The polygonal effect - SPCK chain kit - BMX Race
Influence of the number of teeth on the proper functioning of the drivetrain

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