A well-known Nevada County bicyclist was killed Sunday on Highway 174 as he was climbing the grade from the Bear River toward Colfax in Placer County.Jim "Jimmy" Rogers, 53, of Grass Valley, was struck while riding his bicycle on the right side of the shoulder at 12:15 p.m. on the steep grade, according to CHP Officer Chris Husse. Rogers was knocked off the bicycle by a vehicle being driven by a 55-year-old Chicago Park woman, whose name Husse did not have.He was flown by a CHP helicopter from the scene to Sutter Roseville Medical Center, where he died, Husse said.Who …