The London Cycling Campaign is to hold its second protest in a week, following the death of a man in Holborn.
Around 1,500 cyclists took part in the last protest ride from Tower Hill to Aldgate, which aimed to highlight the lack of separate cycle lanes on some of the capital's busiest roads.
This evening's protest begins at 6.30pm at Russell Square.
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The robbers casually approached their victim on a busy high street before before spraying a noxious substance in his face.
Tencho Hristov ignored warnings and got trapped between barriers at Roydon in Essex.
The 6km bike track will include 130m of the South Circular near Kew Bridge.