Blackspire Sub4 Platform Pedals 400 grams / pair 92 x 92 x 17mm platform CNC'd from custom extruded 6061 T-6 Sealed bearing and proprietary KY bushing internals with nickel plated forged CroMo spindles Replaceable steel 'T' pin traction studs are 2.5mm longer and 0.5mm finer at the tips