Definitely going to go hunt for these!
They've been a game changer for me but YMMV...hope they work well for you!
I've got some from left from last year's online prescription, but being able to pick them up from the supermarket at a cheaper price is good news.
@Stonehedge started
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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Definitely going to go hunt for these!