SC racing in Nottingham was better known as Super Cycle Discount or Super Cycles
Mike Poyzer the owner designed/produced a fairly small number of these 'thumbscrew' seat clamps in the early 80s
They were quite delicate for very lightweight race bikes
SC racing did a few other things like helmet bags and padsets
![](https://lh3.googleusercontent.com/HSIOPDcZm0bYe8jbISXbfCTezF_TG1VyqyGse4tFEqq_Mltx6g_Fgljwj3ZREX94da9auh0jJKoLE8PK0MZxMsejhFxA649L0RBReEC2SVvxwdFheHCBYpJ1UCv0hCCgnAOVguR2MIPwcK1CAUvBFw_Iqay8YnwscAzNcpFP9ljkE905BPLOFqz-KeuPB2zuiXrzZkyy28B4j1EpEgMa-6FXO_0VBYDHQLlhFCUXkk3-cH-fC69UA0dXHXUkY1WV53fBVCaMlgDXf91234kulBUce4B78X03z0GqS8JsJs_PA3DWx1d51jyT6LDETFjB2_JC8fwXxpuFzUSn9vQa_iZmv8XBLQNsqQWk1kklQHwTLFGswfpMsMNCTMiy_QeB2S6APF-uv68JjDfD9oNx55l2Rl7FYczT-N5Z1L7HY5LLYtC_RLJripOUHEp9RrKCaPqSTuJNGLTCkVYKzLpQkjLDyIm0OdgSIaU2SHMRakP28KNi-9dvTWi4UGDwbOJD6YlTgyG8tLsqp8dZlnqIaVRfwDvh9LhIIaLc8Fy2IwMDcaTEuK-VCNLramZm_D-FLR736lcCciabD45ybcaJAsRaDRW6p2Y=w523-h639-no)