The Race and Ergo Ultra pads allow riders to tune their setups for a snug fit. - New foam that resists being crushed for longer periods of time - Improved surface durability - Superior grip with a molded-in textured surface - Compatible with both the Ergo and Race armrest kits - Dimensions: Race (92.9mm x 887.5mm) or Ergo (108.4mm x 87.5mm) - Compatibility: Race / Ergo - Weight: 5mm: 21g / 10mm: 37g