Shimano Deore XT

Deore XT is a mountain and touring bike groupset first introduced by Shimano in 1983.[1] It was Shimano's first mountain bike groupset, based on their existing Deore touring groupset, and it consisted of a triple-, double- or single chainring crankset, front and rear derailleurs, handlebar-mounted "finger" shifters, cantilever brakes, and large-flange hubs.[1] Since then, it has become their "second-tier" offering, the list of components has expanded to include hydraulic disc brakes, a complete wheelset, a chain, and clipless pedals,[2] and it is offered in silver or black finish.[3]

Model history

The groupset was designated by model numbers M7xx; beginning with M700,[1] and ran to M780.[4] Touring groupsets were designated by model numbers T7xx. Current groupsets are designated by model numbers M8100 and T8000.

  • 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
  • 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
  • M780 2011 10-speed
    • 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).
  • T780 2011 10-speed
  • M8000 2015 11-speed
  • T8000 2016 10-speed
  • M8100 2019 12-speed

References
  1. Michael Sweatman. "Shimano Deore XT (M700 1st style)". Disraeli Gears. Retrieved 2012-07-20. A milestone in derailleur history.
  2. "DEORE XT gets full make-over at 30th birthday". Shimano USA. April 14, 2011. Retrieved 2012-07-21.
  3. Richard Tyler (Apr 14, 2011). "New Shimano Deore XT groupset for 2012". BikeRadar. Retrieved 2012-07-21. Shimano roll-out upgrades to their second-tier Deore XT groupset to mark its 30th birthday. The new groupset will be offered in either silver or black.
  4. "Model Number RD-M780". Shimano USA. 2012. Archived from the original on 2012-08-04. Retrieved 2012-07-20.
This article is issued from Wikipedia. The text is licensed under Creative Commons - Attribution - Sharealike. Additional terms may apply for the media files.