65 Tooth Sprocket for #25 Chain with ISO Mounting Pattern Made from Tempered (Hardened) Aircraft Grade Aluminum Alloy65 TeethFor #25 ChainISO Disc Brake Rotor Mounting Pattern35.5mm BoreSix 5.5mm ID Bolt Holes Equally Spaced @ 60 degrees44mm Bolt Circle Diameter
65 Tooth Sprocket for #35 Chain with F4 Mounting Pattern Made from Tempered (Hardened) Aircraft Grade Aluminum Alloy65 TeethFor #35 ChainF4 Mounting Pattern54.1mm BoreFour 6.2mm ID Bolt Holes Equally Spaced @ 90 Degrees65mm Bolt Circle Diameter
65 Tooth Sprocket for #41 and #420 Chain with F4 Mounting Pattern Made from Tempered (Hardened) Aircraft Grade Aluminum Alloy F4 Mounting Pattern 65 Teeth For #41 and #420 Chain 10.6" Outside Diameter 54.1mm ID Bore Four 6.2mm ID Bolt Holes Equally Spaced @ 90 Degrees 65mm Bolt Circle Diameter
70 Tooth Sprocket for #410 Chain with G18 Mounting Pattern Made from Tempered (Hardened) Aircraft Grade Aluminum Alloy70 TeethFor #410 (1/2"x1/8") Bicycle ChainG18 Mounting Pattern5.25" Bolt Circle Diameter4.563" BoreSix 0.261" ID Bolt Holes @ 60 degrees
71 Tooth Sprocket for #25 Chain with F5 Mounting Pattern Made from Tempered (Hardened) Aircraft Grade Aluminum Alloy F5 Mounting Pattern 71 Teeth For #25 Chain 54.1mm (2.13") ID Five 5.25mm (0.2067") ID Bolt Holes 67mm (2.6378") Bolt Circle Diameter
72 Tooth 4-Hole Freewheel Sprocket for #35 Chain Made from Aircraft-Grade Tempered (Hardened) Aluminum AlloyFor #35 Chain72 TeethF4 Mounting Pattern8.8" (223mm) OD2.13" (54.1mm) IDFour 6.2mm ID Bolt Holes2.559" (65mm) Bolt Circle Diameter
72 Tooth Sprocket for #25 Chain with F4 Mounting Pattern Made from Tempered (Hardened) Aircraft Grade Aluminum AlloyF4 Mounting Pattern72 TeethFor #25 Chain54.1mm BoreFour 6.2mm ID Bolt Holes @ 90 degrees65mm Bolt Circle Diameter
72 Tooth Sprocket for #25 Chain with G1 Mounting Pattern Made from Tempered (Hardened) Aircraft Grade Aluminum AlloyG1 Mounting Pattern72 TeethFor #25 Chain2" ID BoreFour 0.375" ID Bolt Holes Equally Spaced @ 90 degrees2.875" Bolt Circle Diameter
72 Tooth Sprocket for #410 (1/2" x 1/8") Bicycle Chain Made from Tempered (Hardened) Aircraft Grade Aluminum Alloy For #410 (1/2" x 1/8") Bicycle Chain 72 TeethG1 Mounting Pattern2" IDFour 3/8" ID Bolt Holes2.875" Bolt Circle Diameter
80 Tooth Sprocket for #25 Chain with G1 Mounting Pattern Made from Tempered (Hardened) Aircraft Grade Aluminum Alloy80 TeethFor #25 ChainG1 Mounting Pattern2.875" Bolt Circle Diameter2" BoreFour 0.375" ID Bolt Holes @ 90 degrees
84 Tooth Sprocket for #25 Chain with ISO Mounting Pattern Made from Tempered (Hardened) Aircraft Grade Aluminum Alloy84 TeethFor #25 ChainISO Disc Brake Rotor Mounting Pattern35.5mm BoreSix 5.5mm ID Bolt Holes @ 60 degrees44mm Bolt Circle Diameter
84 Tooth Sprocket for #35 Chain with ISO Mounting Pattern Made from Tempered (Hardened) Aircraft Grade Aluminum Alloy84 TeethFor #35 ChainISO Disc Brake Rotor Mounting Pattern35.5mm BoreSix 5.5mm ID Bolt Holes @ 60 degrees44mm Bolt Circle Diameter