91 Tooth Sprocket for #410 Chain with ISO Mounting Pattern Made from Tempered (Hardened) Aircraft Grade Aluminum Alloy91 TeethFor #410 (1/2"x1/8") Bicycle ChainISO Disc Brake Rotor Mounting Pattern44mm Bolt Circle Diameter35.5mm BoreSix 5.5mm ID Bolt Holes Equally Spaced @ 60 Degrees
24 Tooth Sprocket for #41 and #420 Chain Made from Aircraft-Grade Tempered (Hardened) Aluminum Alloy For #41 and #420 Chain 24 Teeth F5 Mounting Pattern 4.6" OD 2.13" ID 2.6378" Bolt Circle Diameter Five 5.25mm ID Mounting Holes
65 Tooth Sprocket for #428 Chain Made from Aircraft-Grade Tempered (Hardened) Aluminum Alloy 65 TeethFor #428 Chain2" BoreFour 3/8" ID Bolt Holes2.875" Bolt Circle Diameter
70 Tooth Sprocket for #428 Chain Made from Aircraft-Grade Tempered (Hardened) Aluminum Alloy 70 TeethFor #428 Chain2" BoreFour 3/8" ID Bolt Holes2.875" Bolt Circle Diameter
80 Tooth Sprocket for #428 Chain Made from Aircraft-Grade Tempered (Hardened) Aluminum Alloy 80 TeethFor #428 Chain2" BoreFour 3/8" ID Bolt Holes2.875" Bolt Circle Diameter
90 Tooth Sprocket for #428 Chain Made from Aircraft-Grade Tempered (Hardened) Aluminum Alloy 90 TeethFor #428 Chain2" BoreFour 3/8" ID Bolt Holes2.875" Bolt Circle Diameter
38 Tooth Sprocket for #41 and #420 Chain Made from Aircraft-Grade Tempered (Hardened) Aluminum Alloy For #41 and #420 Chain 38 TeethF5 Mounting Pattern 6" OD 2.125" ID 2.638" Bolt Circle Diameter Five 5.25mm ID Bolt Holes
44 Tooth Sprocket for T8F (8mm) Chain with G1 Mounting Pattern Made from Aircraft Grade Tempered (Hardened) Aluminum For T8F (8mm) Chain 44 Teeth G1 Mounting Pattern 2" ID Four 0.375" (3/8") ID Bolt Holes 2.875" Bolt Circle Diameter
42 Tooth Sprocket for #41 and #420 Chain with R32 Mounting Pattern Made from Aircraft-Grade Tempered (Hardened) Aluminum Alloy For #41 and #420 Chain 42 Teeth R32 Mounting Pattern 26.1mm ID Three 5.5mm ID Bolt Holes 39mm Bolt Circle Diameter
82 Tooth Sprocket for #41 and #428 Chain Made from Aircraft-Grade Tempered (Hardened) Aluminum AlloyFor #428 Chain82 TeethF5 Mounting Pattern2.125" ID2.638" Bolt Circle DiameterFive 5.25mm ID Bolt Holes
90 Tooth Sprocket for T8F (8mm) Chain with G1 Mounting Pattern Made from Aircraft Grade Tempered (Hardened) Aluminum For T8F (8mm) Chain 90 Teeth G1 Mounting Pattern 2" ID Four 0.375" (3/8") ID Bolt Holes 2.875" Bolt Circle Diameter
34 Tooth Sprocket for #428 Chain Made from Aircraft-Grade Tempered (Hardened) Aluminum AlloyFor #428 Chain34 TeethG1 Mounting Pattern2" BoreFour 3/8" ID Bolt Holes2.875" Bolt Circle Diameter