The Schwinn World Sport Bike was a popular bike sold in the early to mid-'80s. It is made from chrome-moly steel lugs and tubes and normally comes with Dia-Compe alloy side-pull cantilever brakes with quick release and extensions. If you want to know the exact kind of brakes your Schwinn World Sport bike has, check online for Scwhinn catalogs or ask your local bike shop. Most bikes come with a model number located on the bottom bracket.
For pad adjustment, loosen the bolt holding the brake pad to the caliper arm with the 10mm flat wrench. Turn it counterclockwise. Align the pad with the top of the rim, but the pad itself should not be touching the tire. Align the pad with the natural curvature of the rim. It should be square with the rim and not at an angle. Tighten the bolt, turning it clockwise and making sure the pad is still aligned.
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Check for play in the caliper arms by pulling them back and forth. If you don't feel any movement, then the brakes don't need adjustment. If there is movement, you will need to tighten the adjusting nut. Two nuts are located at the front of the brake; the outer nut is the locknut and the inner nut is the adjustment nut. Loosen the outer nut with the 10mm flat wrench. Use the 13mm flat wrench to tighten the adjusting nut, turning it clockwise. Tighten the locknut and check for play.
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You can tighten or loosen the brakes by turning the barrel adjustment. You might have to loosen a securing nut. Turning the barrel adjustment to the right, or clockwise if you are looking down at it, will loosen the brakes. Turning it to the left, or counterclockwise, will tighten them. This should be used only as a fine-tuning method when determining brake strength.
