44 Tooth Sprocket for #25 Chain with F4 Mounting Pattern Made from Aircraft Grade Tempered (Hardened) AluminumF4 4-Hole Freewheel Mounting PatternFor #25 Chain44 Teeth3.65" OD54.1mm IDFour 6.2mm ID Bolt Holes Equally Spaced @ 90 Degrees65mm Bolt Circle Diameter
44 Tooth Sprocket for #35 Chain with F4 Mounting Pattern Made from Tempered (Hardened) Aircraft Grade Aluminum Alloy44 TeethFor #35 ChainF4 Mounting Pattern54.1mm BoreFour 6.2mm ID Bolt Holes @ 90 degrees65mm Bolt Circle Diameter
90 Tooth Aluminum Sprocket for #25 Chain with Custom Mounting Pattern Made from Tempered (Hardened) Aircraft Grade Aluminum Alloy Custom Mounting Pattern90 TeethFor #25 Chain186mm Outside Diameter90mm ID BoreFour 9mm ID Bolt Holes @ 90 degrees109.5mm 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
34 Tooth Sprocket with R1 Mounting Pattern for #41 and #420 Chain Made from Tempered (Hardened) Aircraft Grade Aluminum Alloy R1 Mounting Pattern34 TeethFor #41 and #420 Chain5.7" Outside Diameter29mm ID BoreThree 6.2mm ID Bolt Holes @ 120 Degrees38mm Bolt Circle Diameter
90 Tooth 5-Hole Freewheel Sprocket for #410 1/2" x 1/8") Bicycle Chain 90 Teeth F5 Mounting Pattern 14.7" OD 2.13" ID Five 5.25mm ID Bolt Holes 2.6378" Bolt Circle Diameter Made of aircraft-grade tempered (hardened) aluminum alloy.
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
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
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
42 Tooth Sprocket for #25 Chain with F4 Mounting Pattern Made from Aircraft Grade Tempered (Hardened) AluminumF4 4-Hole Freewheel Mounting PatternFor #25 Chain42 Teeth3.5" OD54.1mm IDFour 6.2mm ID Bolt Holes @ 90 Degrees65mm Bolt Circle Diameter
64 Tooth Sprocket for #25 Chain with ISO Mounting Pattern Made from Tempered (Hardened) Aircraft Grade Aluminum Alloy64 TeethFor #25 ChainISO Disc Brake Rotor Mounting Pattern35.5mm BoreSix 5.5mm ID Bolt Holes @ 60 degrees44mm Bolt Circle Diameter
46 Tooth Sprocket for 1/2" x 1/8" Bicycle Chain (G1) 46 tooth sprocket for #410 (1/2" x 1/8") bicycle chain. G1 mounting pattern.2" ID2.875" bolt circle diameter. Four 0.375" (3/8") ID bolt holes. Made of aircraft-grade tempered (hardened) aluminum alloy.