Im not sure there is one - Ive seen people in the 80s and 90s doing TTs. As far as road racing goes Im fairly sure there are no limits, perhaps insurance maybe the limiting factor?
@Tallman started
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Im not sure there is one - Ive seen people in the 80s and 90s doing TTs. As far as road racing goes Im fairly sure there are no limits, perhaps insurance maybe the limiting factor?