Downtube boss fitting, “Non-Index” friction type gear shift levers.These are ideal for bikes where indexing is problematic, or for those who simply prefer the traditional infinitely adjustable trimming function of friction type gears. This 11 speed version has enough cable pull to operate Campag and Shimano 11 speed gear mechs.Polished aluminium lever with Dia-Compe’s ‘Light Action’ ratchet mechanism that extracts lever friction in one direction (Effectively, the rider is only pulling against the gear mechanism spring when shifting down and the spring is assisting the rider when shifting up – making a very easy to use, light action, friction-based gear lever.)Key Features:Downtube boss mounted,Non-indexed friction system works with Shimano and Campag,Multi-gear compatible up to 11 speed,Power Ratchet light action levers,Lightweight forged alloy lever,Polished silver finish,Pair (left lever has smaller size cable-wrap).Note: Not compatible with SRAM 11 speed