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This is a custom-made kit so please allow around 3-5 business days for the kit to be produced and shipped after the order is placed.

This is a custom-made kit with a custom-made axle sprocket so please allow around 5-10 business days for the kit to be produced and shipped after the order is placed.

37 Tooth Sprocket for #41 and #420 Chain, Fits 4-Hole Freewheel

Item #: SPR-42037F4

Availability: In Stock Notify Me When Back In Stock

This kit is really in stock however it is mistakenly marked as being out of stock. Our manager was just notified about this so this kit will be put back in stock very soon. You may click on the "Notify Me When Back In Stock" link above and follow the prompts to receive a back in stock notification email the moment that this kit is put back in stock.