add to all the useful info above .. When I measured them a few years back the fitted 4.50x21 had a rolling perimeter of 2450cms and the fitted 4.75-5.00 x19 had a perimeter of 2300cms... So you may fine the gearing slightly different .. ( I'll let you convert centimetres into feet and inches)
They are all interchangeable other than the caps
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If you are THAT concerned about safety you should be putting the front fenders back on your car as it would be much safer should you get caught in a rain storm rather than removing them for "looks".16" Ford or Kelsey Hayes wires and modern radials.Better ride,better braking,better handling.
Could never understand the 'looks' argument,the car is safer to drive and a better ride with modern tire sidewall flex and more tread contact..
I believe this is also a reason why the car endured,removing the 21's or 19's on a worn used car and fitting 16's changed how it rode and felt,they were less apt to sell or scrap it.
Ruth, you are absolutely right! During WII, 19's and 21's were not available.
I didn’t know that. How come the 19’s and 21’s were not available, but 16’s were available?