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London Fixed Gear and Single-Speed is a community of predominantly fixed gear and single-speed cyclists in and around London, UK.
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@user31843
Thanks for writing these lists, i don't even own a SS of Fixed Gear bike anymore, but these lock details are very useful for us commuters.
I just purchased a Magnum 3103 for 16 quid off ebay to carry about. I leave a 16mm lock at work. I can confirm the metal shackle is 13mm in diameter and it weighs about 800-900g. It appears to be very similar (identical?) to the OnGuard style locks. I looked at the Abus 40/401 but couldn't see much advantage. Ideally i wanted a 16mm mini lock but couldn't find one (most seem to be 16mm across the rubber outer).