Maybe I'm wrong but if I'm remind me well ESP come later. Smoked 800 are 96' so more 97' for the 900 ESP...SRT (and CX) are Shimano/Suntouer/etc as that is all there was, then eventually SRAM brought out their 1:1 actuation and called it ESP, introduced in 1995?
 
 
		 
 
		
 would have been easier to just look at SRAM site
 would have been easier to just look at SRAM site


 
 
		 
 
		 
 
		