Hickory spokes are available as replacements from several sources. If it has the old wood felloes then that complicates things if the wood is going bad. It's amazing how well the old wood wheels would stand up to age and weathering. They don't last forever but with care and good storage, they will last very well. A person should check for looseness in a wood wheel assembly. This can be a sign of shrinkage or excessive wear. This is a good link. http://www.mtfca.com/discus/messages/708324/727544.html?1487680452