SRAM is buying itself out of Triatlantic, the private equity firm that invested in the company in 2009, as a prelude to its own planned public offering, which should raise about $300 million in new equity. The big American supplier of bike components obtained new credit facilities totaling $790 million last month that have allowed it to take over the controlling share in SRAM owned by Trialantic and co-investors for $575 million. SRAM has reported a 62.2 percent increase in net profit to $17.8 million for the first quarter of this year on 20 percent higher sales of $146.5 million. The gross margin improved to 41.1 percent thanks to higher volumes and higher prices.