Top bar gear shifters from Suntour's first Mtb specific early 80's group, Oem spec'd on many early mountain bikes, these ratchet-y clicking classics could easily shift any derailleur setup, then and now, and I have seen and built many 7-8-9 rides with these controls. Great for street commuter rides using 2-3 gears as well, and these 'hold' gearing well if you want to 'lock in' one gear with the ring adjuster. If any questions please ask, and check out my other items of 2 wheel efficiency.......0~0'