No, surprisingly the 11-speed XTR cassette, with its 11-40 tooth configuration, will fit fine on 8, 9 and 10-speed Shimano freehubs. That monster 40 tooth cog has such a large diameter that the chain ...

WolfTooth is bringing wider range cassettes to the Shimano 11-speed crowd with its new GC45 conversion kit.

And Cues keeps it simple, will all three speeds (cassette spacing options) using the same 11-speed chain, which Shimano assures are stronger and longer-lasting than previous 8-, 9-, or-10-speed ...

If you've given yourself completely to the dark side of single speeding, Wheels MFG Dropout 666 will complete the look.

11-speed cassette, £124.99 – Rating: The new Ultra-Drive 11-speed cogs are thinner and mounted on stiffer, lighter aluminium cog carriers than previous years' models.