By Sarah McBride SAN FRANCISCO (Reuters) – Uber, the red-hot rides start-up known for jacking up town-car fares, is taking the opposite approach with its no-frills UberX service. Fares on UberX, which offers rides in ordinary cars at lower prices than the companys high-end town car service, will be cut in 16 cities, Uber said in a blog post Thursday. Chicago, San Francisco, Seattle, Los Angeles, Phoenix and Orange County, in southern California, will see the biggest fare cuts, the blog said. Were going all-in on being the cheapest ride in town, Uber CEO Travis Kalanick wrote.