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72 Tooth Sprocket for #41 and #420 Chain Made from Aircraft-Grade Tempered (Hardened) Aluminum Alloy For #41 and #420 Chain 72 Teeth F4 Mounting Pattern 54.1mm ID 65mm Bolt Circle Diameter Four 6.2mm ID Bolt Holes

72 Tooth Sprocket for #41 and #420 Chain Made from Aircraft-Grade Tempered (Hardened) Aluminum Alloy For #41 and #420 Chain 72 Teeth G1 Mounting Pattern 11.8" OD 2" ID 2.875" Bolt Circle Diameter Four 3/8" ID Bolt Holes

72 Tooth Sprocket for #410 (1/2" x 1/8") Bicycle Chain Made from Aircraft-Grade Tempered (Hardened) Aluminum Alloy For #410 (1/2" x 1/8") Bicycle Chain 72 Teeth F4 Mounting Pattern 54.1mm ID 65mm Bolt Circle Diameter Four 6.2mm ID Bolt Holes

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

72 Tooth Sprocket for #428 Chain Made from Aircraft-Grade Tempered (Hardened) Aluminum Alloy For #428 Chain 72 Teeth F4 Mounting Pattern 54.1mm ID 65mm Bolt Circle Diameter Four 6.2mm ID Bolt Holes

72 Tooth Sprocket for #428 Chain with ISO Mounting Pattern Made from Tempered Aircraft Grade Aluminum Alloy 72 Teeth For #428 Chain ISO Disc Brake Rotor Mounting Pattern 35.5mm Bore Six 5.5mm ID Bolt Holes Equally Spaced @ 60 Degrees 44mm Bolt Circle Diameter

72 Tooth Sprocket for #520 Chain Made from Tempered Aircraft Grade Aluminum Alloy 72 Teeth For #520 Chain ISO Disc Brake Rotor Mounting Pattern 35.5mm Bore Six 5.5mm ID Bolt Holes @ 60 degrees 44mm Bolt Circle Diameter

72 Tooth Sprocket for 8mm Chain 186mm (7-5/16") OD54mm (2-1/8") ID4mm thick.F4 mounting pattern.6.2mm ID bolt holes.Adjacent mounting bolt holes are spaced 47mm (1-3/8") apart from center to center.Made from steel with a zinc plated finish.

72 Tooth Sprocket for T8F (8mm) Chain with G4 Mounting Pattern Made from Tempered (Hardened) Aircraft Grade Aluminum Alloy G4 Mounting Pattern (G4 is a Common Go-Kart Axle Hub Pattern)72 TeethFor T8F (8mm) Chain4.563" ID BoreSix 0.261" ID Bolt Holes Equally Spaced @ 60 Degrees5.25" Bolt Circle Diameter

72 Tooth Sprocket for T8F (8mm) Chain with R34 Mounting Pattern Made from aircraft-grade tempered (hardened) aluminum alloy. 72 tooth sprocket for T8F (8mm) chain. R34 mounting pattern. 29.1mm ID. 39mm bolt circle diameter. Three 6.2mm ID bolt holes.Adjacent bolt holes are spaced 33.77mm center to center distance apart from each other. 

72 Tooth Sprocket for T8F (8mm) Chain with R76-8 Mounting Pattern Made from Tempered (Hardened) Aircraft Grade Aluminum Alloy R76-8 Mounting Pattern72 TeethFor T8F (8mm) Chain76mm ID BoreFour 8.5mm ID Bolt Holes Equally Spaced @ 90 Degrees92mm Bolt Circle Diameter Known Compatibility For converting some Bladez scooter models from #25 chain to T8F (8mm) chain. Fits some Bladez electric scooter rear wheels (measure existing sprocket to confirm that it is the same size before ordering). --> ...

72 Tooth Sprocket for T8F (8mm) Chain with R76-9 Mounting Pattern Made from Tempered (Hardened) Aircraft Grade Aluminum Alloy R76-9 Mounting Pattern72 TeethFor T8F (8mm) Chain76mm ID BoreFour 9.5mm ID Bolt Holes Equally Spaced @ 90 Degrees92mm Bolt Circle Diameter Known Compatibility For converting some Bladez scooter models from #25 chain to T8F (8mm) chain. Fits some Bladez electric scooter rear wheels (measure existing sprocket to confirm that it is the same size before ordering). --> ...