Tektro USA/TRP Brakes has issued a voluntary recall notice for customers and retailers to stop riding and stop selling Spyre and Spyre SLC mechanical disc brake calipers.

The company has identified a specific condition that could result in failure or one or both of the brakes when installed on a bicycle.

The Spyre caliper uses a dual piston design in which ball bearings move within opposing ramps. The company has discovered that in a specific scenario, the balls can be forced from the ramps if the actuator arm is fully activated to its stop with excessively worn or no pads installed.

The effect is that the one or more of the balls can jump from its position within its respective ramp, resulting in a reduction or loss of braking force.

The recall applies to approximately 4,000 brake calipers sold from April 2013 to December 6, 2013.

According to the manufacturer, there has been one reported incident of a single caliper brake failure with no injury or property damage.

Customers are asked to take their Spyre or Spyre SLC’s back to the original place of purchase, or in UK to contact distributor Upgrade Bikes Ltd, Customer Service to arrange a return shipment.

All Spyre and Spyre SLC calipers will be replaced free of charge.

Customer Services, Upgrade Bikes Ltd, Units A-B, Star Road Trading Est, Partridge Green, West Sussex RH13 8RA. Email: TRP@Upgradebikes.co.uk, telephone 01403 712 543 (Recall Centre) or 01403 711 611.