Klein Pulse Mid 90′ 16.5′ Small Size Retro Bike Frame. Klein Pulse Retro Mtb. For 26 wheels and V brakes. Original Flame Red paint, unfortunately the sun and age took their toll as you can see in the photos. Overall, the frame is in good condition, the paint is peeling off in a few places, there are slight traces of corrosion. Frame is from 1994, correct me if I’m wrong. Age is inferred from the disassembled parts vin number in the photos. Weight this frame is 1.70 kg.