Sales of medium- and heavy-duty trucks climbed again in February, according to data compiled by American Trucker sister publicationWardsAuto.Sales were up 16.3% in February on 30,848 deliveries in the month. Class 8 sales were up 26.7% led by Kenworth, which gained 56.5%. Medium-duty sales climbed 4.5%.Inventories are also up, WardsAuto said, with Class 8 stockpiles rising to 43,411 units and medium-duty inventory reaching 48,108.For more on the sales figures, including breakdowns by manufacturer and individual class results, visit: http://wardsauto.com/sales-marketing/us-big-trucks-267-february-0.