Shimano XT FC-M785 Chainring (AM-type) - 38T | 104mm | 10-Speed
What Is the Shimano XT FC-M785 AM-Type Chainring and What Does It Fit?
The FC-M785 AM-type chainring is the 38t outer ring for Shimano's Deore XT 10-speed double crankset, designed specifically for use with the 24t AM-type inner ring in a 38/24t double chainring configuration. The AM designation indicates this is the outer ring of Shimano's compact MTB double setup, which differs from the standard 2x setup in using a smaller tooth count pairing optimized for technical and climbing-focused trail riding. The chainring uses a 104mm BCD (bolt circle diameter), the standard 4-bolt spider interface for this generation of XT cranks, and is machined with Shimano Dyna-Sys shift ramp geometry that works in conjunction with XT and SLX 10-speed rear derailleurs and cassettes for reliable front shifts under load. The outer chainring tooth profile includes shift assist pins and ramp cutouts positioned to pick up the chain smoothly during upshifts from the inner ring, reducing missed shifts on climbs and technical trail sections where maintaining momentum matters.
This chainring is compatible with the Shimano FC-M785 XT crankset and other 10-speed Dyna-Sys double cranksets using a 104mm 4-bolt BCD. It is the AM-type outer ring specifically, not compatible with the triple crankset configurations or the 3-bolt chainring interfaces used on other XT-generation cranks. For riders on Shimano XT FC-M785 double cranks who need to replace a worn outer ring or are building a 38/24t double setup from scratch, this is the correct OEM AM-type replacement.
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Shimano XT FC-M785 Chainring (AM-type) - 38T | 104mm | 10-Speed
Shimano XT FC-M785 Chainring (AM-type) - 38T | 104mm | 10-Speed
What Is the Shimano XT FC-M785 AM-Type Chainring and What Does It Fit?
The FC-M785 AM-type chainring is the 38t outer ring for Shimano's Deore XT 10-speed double crankset, designed specifically for use with the 24t AM-type inner ring in a 38/24t double chainring configuration. The AM designation indicates this is the outer ring of Shimano's compact MTB double setup, which differs from the standard 2x setup in using a smaller tooth count pairing optimized for technical and climbing-focused trail riding. The chainring uses a 104mm BCD (bolt circle diameter), the standard 4-bolt spider interface for this generation of XT cranks, and is machined with Shimano Dyna-Sys shift ramp geometry that works in conjunction with XT and SLX 10-speed rear derailleurs and cassettes for reliable front shifts under load. The outer chainring tooth profile includes shift assist pins and ramp cutouts positioned to pick up the chain smoothly during upshifts from the inner ring, reducing missed shifts on climbs and technical trail sections where maintaining momentum matters.
This chainring is compatible with the Shimano FC-M785 XT crankset and other 10-speed Dyna-Sys double cranksets using a 104mm 4-bolt BCD. It is the AM-type outer ring specifically, not compatible with the triple crankset configurations or the 3-bolt chainring interfaces used on other XT-generation cranks. For riders on Shimano XT FC-M785 double cranks who need to replace a worn outer ring or are building a 38/24t double setup from scratch, this is the correct OEM AM-type replacement.
Product Information
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Shipping & Returns
Shipping & Returns
Description
What Is the Shimano XT FC-M785 AM-Type Chainring and What Does It Fit?
The FC-M785 AM-type chainring is the 38t outer ring for Shimano's Deore XT 10-speed double crankset, designed specifically for use with the 24t AM-type inner ring in a 38/24t double chainring configuration. The AM designation indicates this is the outer ring of Shimano's compact MTB double setup, which differs from the standard 2x setup in using a smaller tooth count pairing optimized for technical and climbing-focused trail riding. The chainring uses a 104mm BCD (bolt circle diameter), the standard 4-bolt spider interface for this generation of XT cranks, and is machined with Shimano Dyna-Sys shift ramp geometry that works in conjunction with XT and SLX 10-speed rear derailleurs and cassettes for reliable front shifts under load. The outer chainring tooth profile includes shift assist pins and ramp cutouts positioned to pick up the chain smoothly during upshifts from the inner ring, reducing missed shifts on climbs and technical trail sections where maintaining momentum matters.
This chainring is compatible with the Shimano FC-M785 XT crankset and other 10-speed Dyna-Sys double cranksets using a 104mm 4-bolt BCD. It is the AM-type outer ring specifically, not compatible with the triple crankset configurations or the 3-bolt chainring interfaces used on other XT-generation cranks. For riders on Shimano XT FC-M785 double cranks who need to replace a worn outer ring or are building a 38/24t double setup from scratch, this is the correct OEM AM-type replacement.
