With the XC Pro groupset SunTour tried to take the fight to Shimano by claiming the high ground above Deore XT. This derailleur is very well made, with a high gloss finish, sealed bearing pulley wheels and a solid business-like feel. As was de rigeur at the time, it has two sprung pivots and a slant parallelogram. It was an impressive piece of equipment, but Shimano had better chains, better sprockets, better marketing and a better reputation.

This is the longest cage version of the three.

____________________________________________

1. •Brand: SunTour
   

2. •My category: SunTour - the mountain bike gears
   

3. •Country: Japan
   

4. •Date of introduction: 1990? (instructions printed in 1990)
   

5. •Date of this example: 1991 (two letter date code is HJ)
   

6. •Model no: XP00-GXB
   

7. •Weight: 278g
   

8. •Maximum cog: 28 teeth (hanger 24mm), 30 teeth (hanger 26mm) or 32 teeth (hanger 28mm or more) (Source: Sutherland’s 6th edition)
   

9. •Total capacity: 40 teeth (Sutherland’s 6th edition)
   

10. •Pulley centre to centre: 85mm
    

11. •Index compatibility: 7 speed?
    

12. •Chain width: 3/32”
    

13. •Logic: top normal
    

14. •Pivots: two sprung pivots
    

15. •Material: largely aluminium with a steel inner pulley cage plate
    

0275/I