Duckpin bowling Duckpin bowling Duckpin bowling is a variation of 10-pin bowling. The balls used in duckpin bowling are in (12 cm) to 5 in (12.7 cm) in diameter (which is slightly larger than a softball), weigh 3 lb 6 oz (1.5 kg) to 3 lb 12 oz (1.7 kg) each, and lack finger holes. They are thus significantly smaller than those used in ten-pin bowling but are slightly larger and heavier than those used in candlepin bowling. The pins, while arranged in a triangular fashion identical to that used in ten-pin bowling, are shorter, smaller, and lighter than their ten-pin equivalents,
Ten-pin bowling to knock down all ten bowling pins. Optimal ball speed, which is defined as the time it takes for the ball to travel from one foot past the foul line to the head pin, is 2.3 seconds (this number can shift to 2.2 or 2.4 depending on the dryness or slickness of the lane). A ball that is rolled too fast will not give the pins enough time to “mix” with other pins, or in other words, to knock each other down in a domino effect motion. Conversely, a ball rolled too slowly will deflect too much and will not