is always an interesting challenge.  The best sizes (that match the original cars' profiles) do not offer many high-performance choices.  With 15" wheels (7.5" and 9.5" wide), we recommend:

Front*: 235/60-15 (If you can't find 235s, 245/60-15 will fit the 427 after chassis 731)

*Avon tires seem to be sized a little differently.  Use 225/65-15 instead.  See below for M/T sizes.

Rear: 295/50-15 (rim width 9" or more), 275/55-15 (rim width less than 9")

Other possible sizes (including 16" and 17" rims) are listed here.

Some Tire Sources

Technical information

Wheel Sizes For: 427 -------  FIA

Speed Ratings

In the USA, since you will never excede the legal speed limit, Winkspeed ratings shouldn't be a primary factor in tire choice.  But, it's nice to have a little safety factor anyway.  As you search through the tire distributors' offerings, you will find that only Avon and M/T (S/R only) tires have a higher-than-T speed rating. 

Currently the available brands that (may) offer both sizes include

There may be others, so it never hurts to search around.

Speed ratings

  • S = 112 MPH, 180km/h
  • T = 118 MPH, 190km/h
  • U = 124 MPH, 200km/h
  • H = 130 MPH, 210km/h
  • V = 149 MPH, 240km/h
  • Z = 149 MPH, 240km/h and over
  • W = 168 MPH, 270km/h
  • Y = 186 MPH, 300km/h