Front hubs the same.
Solid axle cars (incl TR2s, 3s, 3As, 4s & non-IRS 4As) have same rear hubs.
TR4A IRS hubs totally different.
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Should add: if looking at used hibs, they may be fitted with studs for either disc wheels (longer) or wire wheels (shorter). Studs can be shortened or changed outright as required.</span>