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Z Groove Red 64mm Hard and grooved these wheels were very different. They came out in 1978 after the Z Farrell wheels. Three 5mm grooves cut into the running surface. |
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Z Smooth Red Conical Smooth version of the above wheel. These have a single conical back. I'm not sure if there was a Z-Smooth without the conical, I'm sure there was, and these are the later model. |
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