that frame, still in development really weighs 4.9 lbs with the tensioner, no brake booster is needed. This is actual, not "claimed" weight. though, I do really like the frame shape, it's not what controls how I design things. Many of the current frame products that are quite pleasing the the eye, have engineering compromises. Many may feel these are acceptable, I do not. My goal is to produce a frame of superior strength to weight ratio for better performance and longer service.