Sadiq Khan, the current Mayor of London, was spotted riding a (strikingly regular) bike around in May 2020.

What is the contraption attached to the center of his handlebars?

odd contraption attached to center of handlebars

1 Answer 1


Looks to me like Shimano CI Deck gear indicators. They connect to the shifters with a little cable that pulls a dial to tell the rider what gear they're using.

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From the user's view:
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  • not so regular after all ;)
    – johnDanger
    Jul 28, 2020 at 22:26
  • These are similar in concept to the Visual Gear Display/Indicator (VGD / VGI) on many MTB pod shifters. I have a similar display on my alfine11 hub because otherwise there's no way to know what gear it is in. DI2-equipped bikes can have a wireless display module peered with the system too. Tandem riders can appreciate how hard it is to see your own cassette and chainrings when they're several metres behind you!
    – Criggie
    Jul 29, 2020 at 2:40

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