The European Union responded with measures that hit around US$3.25 billion ($4.7b) worth of American-made products, including on American-made motorcycles.
Harley-Davidson said the new tariffs would add about US$2,200 per average motorcycle exported from the US to the EU.
Since its announced moved, Harley-Davidson has endured harsh criticism from the president, who has said in a tweet that any shift in production by the company "will be the beginning of the end." He added: "The Aura will be gone and they will be taxed like never before!"
That criticism is no doubt on the minds of Polaris executives as they seek ways to mitigate the effects of the tariffs.
In its first quarter earnings released earlier this month, Polaris projected around US$15 million in additional costs in 2018. Rogers said the latest tariffs would raise costs further, declining to estimate by how much.
"But we're definitely seeing an increase in costs," she said.
Polaris employs around 650 people at its Iowa plant in Spirit Lake.
- AP