Seth Rosko builds steel frames quietly in Brooklyn with little fan-fare or publicity. As a bike builder, he draws on his experience racing and fabricating vintage motorcycles, and his many years of work under the Brooklyn Machine Works (known for their Gangsta Track, DH and park bikes) banner. Since setting off on his own, Seth seems eager to challenge himself with designing frames to fit the individual rider, from road to BMX bikes. His background serves him well as he succeeds in achieving understated form driven by function, frames that speak in pure, purposeful designs for aggressive riding and racing. There are no hand-carved lugs, no polished head-badges, just precisely-machined bits, thoughtfully affixed to quality tubes.