Achilles Heel Clamp & Chain Guard Custom Heel Clamp inserts V-Block, C, & Figure hugging. Adjustable Tendon, available in Hex Bar or Round, Custom bands to order, but only for the fanatics. I only use the outer ring on my bikes, so I think I would prefer to have a chain guard than a derailleur & an internal rear gear hub, if gears are still needed. and based on this design, I am starting to dream of a direct drive chain guard, surely dyson could help?
