415 A 40 Tooth 6 HOLE Sprocket for the Peerless 100 Series - 141-D Differential.
We took a #41 sprocket and Milled the teeth to fit # 415 or 415H chain, 1/2" pitch x 3/16" width. 

This sprocket has the Special 6 HOLE bolt pattern drilled and has a 2-1/8" ID to match the hub used on some Pedicabs.

Use # 415 or 415H Chain 1/2" pitch x 3/16" width. 

Order chain, master links with the below links.

Chain 415 110 links KMC 1/2" x 3/16" Standard Duty

Master Link / Connecting Link 415 Standard Duty KMC 1/2" x 3/16"

Offset 415-OL Half Link 1/2" x 3/16"

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Chain 415H Heavy Duty KMC EXTREME 1/2" x 3/16" 98 Links

Master Link / Connecting Link 415H-NP KMC EXTREME 1/2" x 3/16"