[Bob Bidonde]

The connection of frame members need to be structurally sound. The frame is riveted together and rivets completely fill their holes that makes them efficient fasteners in shear but not so good in tension. Bolts used to replace rivets should have a line fit or slight interference fit in their frame holes to be efficient shear connections. Unlike rivets, bolts can carry tension forces efficiently. So properly fitted Grade 8 bolts are superior to rivets.