A2

90 Tooth 4-Hole Freewheel Sprocket for 1/2" x 1/8" Bicycle Chain 90 tooth 4-hole freewheel sprocket for 1/2"x1/8" (#410) bicycle chain. 14.618" OD2.125" ID2.559" bolt circle diameterFour 0.244" ID bolt holesMade of aircraft-grade tempered (hardened) aluminum alloy.

57 Tooth Sprocket for #41 and #420 Chain Made from Aircraft-Grade Tempered (Hardened) Aluminum Alloy For #41 and #420 Chain 57 Teeth F5 Mounting Pattern 9.4" OD 54.1mm (2.13") ID Five 5.25mm (0.2067") ID Bolt Holes 67mm (2.6378") Bolt Circle Diameter

27 Tooth Sprocket for #41 and #420 Chain Made from Aircraft-Grade Tempered (Hardened) Aluminum Alloy For #41 and #420 Chain 27 Teeth F5 Mounting Pattern 4.6" OD 2.13" ID 2.6378" Bolt Circle Diameter Five 5.25mm ID Mounting Holes

30 Tooth Sprocket for #41 and #420 Chain with F5 Mounting Pattern Made from Tempered (Hardened) Aircraft Grade Aluminum For #41 and #420 Chain 30 Teeth F5 Mounting Pattern 5.1" OD 2.125" ID 2.638" Bolt Circle Diameter Five 5.25mm ID Bolt Holes

32 Tooth Sprocket for #41 and #420 Chain Made from Aircraft-Grade Tempered (Hardened) Aluminum Alloy For #41 and #420 Chain 32 Teeth G1 Mounting Pattern 5.4" OD 2" ID 2.875" Bolt Circle Diameter Four 3/8" ID Bolt Holes

32 Tooth Sprocket for #41 and #420 Chain Made from Aircraft-Grade Tempered (Hardened) Aluminum Alloy For #41 and #420 Chain 32 Teeth F5 Mounting Pattern 5.4" OD 2.125" ID 2.638" Bolt Circle Diameter Five 5.25mm ID Bolt Holes

35 Tooth Sprocket for #41 and #420 Chain Made from Aircraft-Grade Tempered (Hardened) Aluminum Alloy For #41 and #420 Chain 35 Teeth 5.9" OD 2.125" ID 2.638" Bolt Circle Diameter Five 5.25mm ID Bolt Holes

36 Tooth Sprocket for #41 and #420 Chain Made from Aircraft-Grade Tempered (Hardened) Aluminum AlloyFor #41 and #420 Chain36 TeethG1 Mounting Pattern6.1" OD2" ID2.875" Bolt Circle DiameterFour 3/8" ID Bolt Holes

36 Tooth Sprocket for #41 and #420 Chain Made from Aircraft Grade Tempered (Hardened) Aluminum Alloy For #41 and #420 Chain 36 Teeth F4 Mounting Pattern 6" OD 54.1mm ID Bore Four 6.2mm ID Bolt Holes @ 90 Degrees 65mm Bolt Circle Diameter Fits 4-Hole Freewheels Item # FWM-120 and FWM-125 Fits 16-Tooth Freewheels Item # FWM-100 and FWM-180 ...

36 Tooth Sprocket for #41 and #420 Chain Made from Aircraft-Grade Tempered (Hardened) Aluminum Alloy For #41 and #420 Chain 36 Teeth 6" OD 2.125" ID 2.638" Bolt Circle Diameter Five 5.25mm ID Bolt Holes

40 Tooth Sprocket for #41 and #420 Chain Made from Aircraft-Grade Tempered (Hardened) Aluminum Alloy For #41 and #420 Chain 40 TeethF5 Mounting Pattern 6.7" OD 2.125" ID 2.638" Bolt Circle Diameter Five 5.25mm ID Bolt Holes

42 Tooth Sprocket for #41 and #420 Chain Made from Aircraft-Grade Tempered (Hardened) Aluminum Alloy For #41 and #420 Chain 42 TeethF5 Mounting Pattern 7" OD 2.125" ID 2.638" Bolt Circle Diameter Five 5.25mm ID Bolt Holes