Chinese bike-sharing pioneers Ofo and Mobike face off in the US against Silicon Valley-based LimeBike. : A race to dominate the rapidly growing smart bike market is on: Pioneering, unicorn-financed Chinese start-ups Ofo and Mobike are facing off in the United States with pumped-up Silicon Valley-based rival LimeBike. Freshly loaded with $50 million more in investment and geared up to launch in 10 more U.S. cities this year, LimeBike is pedaling fast in the United States to pass China's Ofo and Mobike with their big ambitions and billion-dollar coffers from China power players Tencent and Alibaba.