The GoatLink is simply the fastest route to improved wear and long-term shifting performance on wide-range
1x10 drivetrains using the Shimano Shadow+ Rear derailleurs. The GoatLink, made by Lindarets and Wolf Tooth,
re-positions 10-speed Shimano Shadow+ Rear derailleurs to the optimal location when using the GC 40T and GC 42T
cassette expanders.
Compatibility
Compatible Shimano Shadow+ 10-speed rear derailleurs (clutch type ONLY) have a
Direct Mount link (including spacer, if so equipped) or B-pivot knuckle with a thickness of 7.9-8.1mm.
Shimano changed to this sometime in 2013. Very early Shadow+ rear derailleurs have a thinner link and are
not compatible. Here is how to take that measurement: