45 Tooth Sprocket for #41 and #420 Chain Made from Aircraft-Grade Tempered (Hardened) Aluminum Alloy For #41 and #420 Chain 45 Teeth F5 Mounting Pattern 7.5" OD 2.125" ID 2.638" Bolt Circle Diameter Five 5.25mm ID Bolt Holes
50 Tooth Sprocket for #41 and #420 Chain Made from Aircraft-Grade Tempered (Hardened) Aluminum Alloy For #41 and #420 Chain 50 Teeth F5 Mounting Pattern 8.3" OD 2.125" ID 2.638" Bolt Circle Diameter Five 5.25mm ID Bolt Holes
54 Tooth Sprocket for #41 and #420 Chain F4 Mounting PatternFits 4-hole freewheels item # FWM-120 and FWM-125.Fits 16-tooth freewheels item # FWM-100 and FWM-180.Made of aircraft-grade tempered (hardened) aluminum alloy.
55 Tooth Sprocket for #41 and #420 Chain Made from Aircraft-Grade Tempered (Hardened) Aluminum Alloy For #41 and #420 Chain 55 Teeth F5 Mounting Pattern 9.1" OD 2.125" ID 2.638" Bolt Circle Diameter Five 5.25mm ID Bolt Holes
57 Tooth Sprocket for #41 and #420 Chain Made from Aircraft-Grade Tempered (Hardened) Aluminum AlloyFor #41 and #420 Chain57 TeethG1 Mounting Pattern9.4" OD2" ID2.875" Bolt Circle DiameterFour 3/8" ID Bolt Holes
58 Tooth Sprocket for #41 and #420 Chain F5 Mounting PatternFits 5-hole freewheel item number FWM-205 and FWM-210.Made of aircraft-grade tempered (hardened) aluminum alloy.
62 Tooth Sprocket for #41 and #420 Chain Made from Aircraft-Grade Tempered (Hardened) Aluminum Alloy For #41 and #420 Chain 60 Teeth G1 Mounting Pattern 9.9" OD 2" ID 2.875" Bolt Circle Diameter Four 3/8" ID Bolt Holes
60 Tooth Sprocket for #41 and #420 Chain Made from Aircraft-Grade Tempered (Hardened) Aluminum Alloy For #41 and #420 Chain 60 Teeth F5 Mounting Pattern 9.9" OD 2.125" ID 2.638" Bolt Circle Diameter Five 5.25mm ID Bolt Holes
64 Tooth Sprocket for #41 and #420 Chain Made from Aircraft-Grade Tempered (Hardened) Aluminum Alloy For #41 and #420 Chain 64 Teeth G1 Mounting Pattern 10.1" OD 2" ID 2.875" Bolt Circle Diameter Four 3/8" ID Bolt Holes
65 Tooth Sprocket for #41 and #420 Chain Made from Aircraft-Grade Tempered (Hardened) Aluminum Alloy For #41 and #420 Chain 65 Teeth F5 Mounting Pattern 10.8" OD 2.125" ID 2.638" Bolt Circle Diameter Five 5.25mm ID Bolt Holes
68 Tooth Sprocket for #41 and #420 Chain Made from Aircraft-Grade Tempered (Hardened) Aluminum Alloy For #41 and #420 Chain 68 Teeth G1 Mounting Pattern 11.1" OD 2" ID 2.875" Bolt Circle Diameter Four 3/8" ID Bolt Holes
70 Tooth Sprocket for #41 and #420 Chain Made from Aircraft-Grade Tempered (Hardened) Aluminum Alloy For #41 and #420 Chain 70 Teeth F5 Mounting Pattern 11.5" OD 2.125" ID 2.638" Bolt Circle Diameter Five 5.25mm ID Bolt Holes