Hello, up for sale is a 1990 Burley Child Crankset Conversion Kit. For drivetrains with 5-8 spd cassettes/freewheels. Full Kit including Sugino Idol crankset (127 mm arms), chain, adjustable bottom bracket shell for 1 1/8" seat tubes found on mostly steel tandem bikes, sealed English threaded bottom bracket, triple chainring bolts w/spacer washers, crank bolts and crank dust caps. Hard to find and NOS, in the original shipping box! Great way to get your child on your Jack Taylor, Ibis, Osell, Schwinn Paramount, Ritchey, Devinci, Gitane, Santana, Co-Motion or other tandem bike with a 1 1/8" seat tube. Buyer to pay $12.20 USPS Priority Mail shipping with tracking and insurance. Will ship Worldwide with Ebay's Global Shipping. Thanks for looking!