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Shimano Deore XT

Deore XT is a mountain and touring bike groupset first introduced by Shimano in 1983.{{cite web

Model history

The groupset was designated by model numbers M7xx; beginning with M700, and ran to M780.{{cite web |url-status = dead

M700 1983 friction (Deer Head)
M730 1987 6-speed
M732 1989 7-speed
M735 1992 7-speed
M737 1993 8-speed
M739 1995 8-speed
M750 1999 9-speed (first groupsets sold already in 1998, these sets are code-stamped WK onwards)
M760 2003 9-speed
M770 2008 9/10-speed
- Rear derailleur: introduction of Shadow low-profile design, which reduced the risk of damage from side hazards. Shimano has released four models of rear derailleur in M770 lineup:
  - RD-M770, 9 speed, reversed spring
  - RD-M771, 9 speed
  - RD-M772, 9 speed, Shadow profile
  - RD-M773, 10 speed, Shadow profile
- Front Derailleur:
  - FD-M770, 9 speed
M780 2011 10-speed
- Shifting Lever:
  - SL-M780-B-IR, 10 speed, I-spec B
  - SL-M780-B-IL, 2/3 speed, I-spec B
  - SL-M780-R, 10 speed, clamp band
  - SL-M780-L, 2/3 speed, clamp band
- Front Derailleur:
  - FD-M785, 2 speed, clamp band, top swing, dual-pull
  - FD-M785-E2, 2 speed, e-type, top swing, dual-pull
  - FD-M786, 2 speed, clamp band, down swing, dual-pull (top-pull exclusive)
  - FD-M786-D, 2 speed, direct mount, down swing, dual-pull (top-pull exclusive)
  - FD-M780-A-B, 3 speed, clamp band, top swing, dual-pull
  - FD-M781-A-B, 3 speed, clamp band, down swing, dual-pull
  - FD-M781-A-D, 3 speed, direct mount, down swing, top-pull
  - FD-M780-A-E, 3 speed, e-type, top swing, down-pull
- Rear derailleur: introduction of Shadow Plus technology, which added a switchable clutch used to stabilize chain tension. Shimano has released two versions of the rear derailleur - M781 (without clutch) and M786 (with clutch). Both versions were sold in two cage length options - GS (medium) and SGS (long, 95 mm between centres of jockey wheels axis).
  - RD-M781-SGS, 10 speed, Shadow, long cage (total capacity 43T)
  - RD-M786-SGS, 10 speed, Shadow Plus, long cage (total capacity 43T)
  - RD-M781-GS, 10 speed, Shadow, medium cage (total capacity 35T)
  - RD-M786-GS, 10 speed, Shadow Plus, medium cage (total capacity 35T)
- Brake Lever:
  - BL-M785-B, hydraulic disc brake, open clamp band, compatible with I-spec B
T780 2011 10-speed
M8000 2015 11-speed
- Shifting Lever:
  - SL-M8000-R, 11 speed, clamp band
  - SL-M8000-L, 2/3 speed, clamp band
  - SL-M8000-IR, 11 speed, I-spec II
  - SL-M8000-IL, 2/3 speed, I-spec II
  - SL-M8000-B-IR, 11 speed, I-spec B
  - SL-M8000-B-IL, 2/3 speed, I-spec B
- Front Derailleur:
  - FD-M8000-D, 3 speed, direct mount, side swing, front-pull
  - FD-M8000-E, 3 speed, e-type, side swing, front-pull
  - FD-M8000-H, 3 speed, high clamp band, side swing, front-pull
  - FD-M8000-L, 3 speed, low clamp band, side swing, front-pull
  - FD-M8020-D, 2 speed, direct mount, side swing, front-pull
  - FD-M8020-E, 2 speed, e-type, side swing, front-pull
  - FD-M8020-H, 2 speed, high clamp band, side swing, front-pull
  - FD-M8020-L, 2 speed, low clamp band, side swing, front-pull
  - FD-M8025-H, 2 speed, high clamp band, down swing, dual-pull (top-pull exclusive)
  - FD-M8025-L, 2 speed, low clamp band, top swing, dual-pull (down-pull exclusive)
  - FD-M8025-D, 2 speed, direct mount, down swing, dual-pull (top-pull exclusive)
  - FD-M8025-E, 2 speed, e-type, top swing, dual-pull (top-pull exclusive)
- Rear Derailleur:
  - RD-M8000-SGS, 11 speed, Shadow Plus, long cage (total capacity 47T)
  - RD-M8000-GS, 11 speed, Shadow Plus, medium cage (total capacity 39T)
- Brake Lever:
  - BL-M8000, hydraulic disc brake, open clamp band, compatible with I-spec II
T8000 2016 10-speed
M8100 2019 12-speed
- Shifting Lever:
  - SL-M8100-R, 12 speed, clamp band
  - SL-M8100-IR, 12 speed, I-spec EV
  - SL-M8100-L, 2 speed, clamp band
  - SL-M8100-IL, 2 speed, I-spec EV
- Front Derailleur:
  - FD-M8100-D, 2 speed, direct mount, side swing, front-pull
  - FD-M8100-E, 2 speed, e-type, side swing, front-pull
  - FD-M8100-M, 2 speed, clamp band, side swing, front-pull
- Brake Lever:
  - BL-M8100, hydraulic disc brake, open clamp band, compatible with I-spec EV

References

Info: Wikipedia Source

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