Shimano Deore LX T671 XT T781 36t 104mm 10-Speed Middle Chainring MPFN-301-39673-A001 Precision CNC machined into two

Precision CNC machined into two pieces the hollowed out halves feature a series of three main ridges and grooves down the outside of each arm that form a tightly interlocking single piece

It's a top cap

}Salsa Team Polytone Men's Bib Short - Dark Blue X-Large

which reduces battery consumption

Shimano Deore LX T671 XT T781 36t 104mm 10-Speed Middle Chainring MPFN-301-39673-A001 Precision CNC machined into twoShimano Deore LX T671 XT T781 36t 104mm 10 Speed Middle Chainring. Shimano Deore LX M580 T671 9 10 Speed Chainrings TECH SPECS Tooth Count 36 Ring Position Type Middle Drivetrain Speeds 10 Chainring BCD 104 Color Black Defined Color Black Material Aluminum