Quick Answer: Spike and Oozy pedals produced between 2011 and 2014, have black friction seals (at the inboard end of the pedal/axle), and serial codes (on the left pedal body) starting with 11, 12, 13, or 14. Spike and Oozy pedals produced in 2015 or later have bright green friction seals, and serial codes starting with 15, 16, 17… Spoon pedals have been produced from 2015, and have not been changed or updated since.Spank Oozy and Spike pedals were updated in 2015, with some important design changes. Pedals produced between 2011 and 2014, have black rubber friction seals at the inboard end, between axle and pedal body, and have serial numbers starting with L11-L14.Pedals produced in 2015 or later, use bright green friction seals, and have serial numbers starting with L15 or higher.Spike/Oozy Pedal axles and black friction seals used in 2011-2014 pedals are not compatible with 2015 or later pedals.  Spike/Oozy Pedal axles and green friction seals used in 2015 and later pedals, are not compatible with 2011-2014 pedals.2011-2014 version axles and black friction seals are still available from Spank Industries and authorized Spank distributors.2015 and newer version axles and green friction seals are also available here.Axles and friction seals are the only parts which are not compatible between pedals produced from 2011-2014, and pedals produced in 2015 or later. All other parts, including lock nuts, dust caps, O-ring seals, 0.2mm stainless shim washers, and IGUS bushings are interchangeable.Spoon Pedals have been produced since 2015, and have not been revised to date. However, Spoon 90 (Small) pedals do use a different size axle and bushing, than Spoon 100 (Medium) and Spoon 110 (Large) pedals.  Spoon 90 Pedal Axle Rebuild KitSpoon 90 Pedal Bearing/Bushing Kit All service parts for Spoon 100 and Spoon 110 pedals are the same. Spoon 100/110 Pedal Axle Rebuild KitSpoon 100/110 Pedal Bearing/Bushing Kit  It is important when ordering Spoon pedal service parts, that you order the correct kit for your pedals, by first determining if your pedals are Spoon 90, or if they are Spoon 100 or 110, then select the corresponding size pedal service kit.