1968 Factory Tire: F70x14 to Radials

1968 Chevelle Factory Tire:  F70x14

According to Coker Tire website , the F70-14 is 26.2″ tall

I’ve used a basic equivalency chart for years.
E70-14 >>  215-70R14
F70-14 >>  225-70R14
F60-15 >>  235-60R15

Notes:  On the BFG site, the radial T/A 225/70-14 is 26.5″, a good sub for the F70, the 215/70-14 is 25.9″, a good sub for the E70. Other manufacturer’s sizes will vary slightly.

 

Direct Radial Replacement Sizes for factory F70x14
Front Tires: 215/70R14

Section Width:  8.46in
Rim Diameter:  14in
Overall Diameter: 25.85in
Sidewall Height:  5.92

Rear Tires: 225/70R14
Section Width:  8.85 in
Rim Diameter:  14in
Overall Diameter: 26.40 in
Sidewall Height:  6.20 in

 

17 rim 15 rim tire side by side
17 rim 15 rim tire side by side

Current Tires on 1968 Chevelle
Front Tires: 225/60R15

Section Width:  8.85in
Rim Diameter:  15in
Overall Diameter: 25.62in
Sidewall Height:  5.31

Rear Tires: 255/60R15
Section Width:  10.3in
Rim Diameter:  15in
Overall Diameter:  27.04in
Sidewall Height:  6.02 in
Speedometer Difference:  4.602% too slow

225-60R15 tire Chevelle
225-60R15 tire Chevelle

 

New Tires and 17″ Rims:

Front Tires: 215/50ZR17
Section Width:  8.46 in
Rim Diameter:  17in
Overall Diameter: 25.46 in
Sidewall Height:  4.23 in

OR

Front Tires: 235/45R17
Section Width:  9.25 in
Rim Diameter:  17in
Overall Diameter: 25.32 in
Sidewall Height:  4.16 in

215/50ZR17 tire Chevelle
215/50ZR17 Chevelle

Rear Tires: 245/45ZR17
Section Width:  9.64 in
Rim Diameter:  17in
Overall Diameter: 25.68 in
Sidewall Height:  4.34 in
Speedometer Difference: 3.061% too slow