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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.

54 Tooth Sprocket for T8F (8mm) Chain with G1 Mounting Pattern Made from Aircraft Grade Tempered (Hardened) Aluminum For T8F (8mm) Chain 54 Teeth G1 Mounting Pattern 2" ID Four 0.375" (3/8") ID Bolt Holes 2.875" Bolt Circle Diameter

54 Tooth Sprocket for T8F (8mm) Chain with R32 Mounting Pattern Made from Aircraft Grade Tempered (Hardened) Aluminum For T8F (8mm) Chain 54 Teeth R32 Mounting Pattern 26.1mm ID Three 5.5mm ID Bolt Holes 39mm Bolt Circle Diameter

55 Tooth 4-Hole Freewheel Sprocket for 1/2" x 1/8" Bicycle Chain Made from Aircraft-Grade Tempered (Hardened) Aluminum Alloy For 1/2" x 1/8" (#410) Bicycle Chain 55 Teeth F4 Mounting Pattern 9.05" OD (approximate) 2.125" ID 2.559" Bolt Circle Diameter Four 0.244" ID Bolt Holes

55 Tooth 2-1/8" Bore 5-Hole Sprocket for 1/2" x 1/8" Bicycle Chain 55 tooth bicycle chain sprocket. Made of aircraft-grade tempered (hardened) aluminum alloy.9.362" OD.2.125" IDFive 5.1mm ID mounting holes. Fits onto our 5-hole freewheel item # FWM-205. Compatible with 1/2" x 1/8" bicycle chain (#410 chain).

55 Tooth Sprocket for #35 Chain Made from Aircraft-Grade Tempered (Hardened) Aluminum Alloy For #35 Chain55 TeethF5 Mounting Pattern6.783" OD2.125" IDFive 5.2mm ID Bolt Holes2.638" Bolt Circle Diameter

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

55 Tooth Sprocket for 1/2" x 1/8" #410 Bicycle Chain (G1) 55 tooth sprocket for 1/2" x 1/8" (#410) bicycle chain. 9.362" ODG1 Mounting Pattern2" ID2.875" bolt circle diameter.Four 3/8" ID bolt holes. Made of aircraft-grade tempered (hardened) aluminum alloy.

56 Tooth Sprocket for T8F (8mm) Chain with G1 Mounting Pattern Made from Aircraft Grade Tempered (Hardened) Aluminum For T8F (8mm) Chain 56 Teeth G1 Mounting Pattern 2" ID Four 0.375" (3/8") ID Bolt Holes 2.875" Bolt Circle Diameter

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

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.