Question: When should I leave urethane in the bag?

Answer:

Leave it in the bag on fresh, heavy house oil if you have lower revs, on longer patterns if you have high revs, or when your carry depends on a sharp entry angle. Beginners should usually start with an entry-level reactive ball instead. Urethane is a specialist piece, not an everyday league ball for most house shots.

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bowling-balls Knowledge and Resources: When to Use a Urethane Bowling Ball (and When to Leave It in the Bag)

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Urethane isn't a weaker reactive ball. It's a different tool. This guide explains how urethane actually moves, when it beats reactive, when it'll cost you carry, and how to throw it so the ball does what it was built to do.

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