when was last year bike manufactures used thumbies

Re:

Rapidfire and their other manufacturer options was almost instant switchover in 1990 through the bike ranges when they where released and thumbies sidelined or gripshift where used on preference* to thumbies too (or payed to by SRAM*).
Some people kept on with them, but were few and mainly to segment in the market and get the old stuck in the mud types. But generally these drips and drabs gone by 1993 or so.

BSO still had them though and cheaper to make even than the lowly 200GS rf's
 
Re:

Yes for marketing of course.
DX for low end XC Pro for high end.

Or knowing Kona, because they bought a bulk purchase cheaply at end if life and it fitted Kona lever cheaply over using STI on mounts or gripshift.
 
Interesting, yes, my 94 Kona Explosif came with suntour thumbies, I thinking the Marin IFT it replaced had rapidfire by that time, had never really thought about that before.
 
The 94 Rocky Mountain Blizzard came with XT thumbies, then they switched over to Gripshift the next year. Too bad because the 1st year of Gripshift required 10x the maintenance as thumbies!
 
In Shimano offer thumbies was gone in 1990 (1989 was the last, then they offered Rapidfires, then Rapidfire Plus Ofc I mean hi-end groups Deore / XT, not Altus or Tourney, which offering thumbs much longer )
But fex Scott were instaling DX/XT thubies to bikes equipped in Scott/Pedersen brakes even in 1992

How about other brands (Suntour /Campa) - don't know for sure
Suntour shows 3x8 in '92 as I remember, and they have in offer XC Pro 3x8 thumbs
 

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