The 38s are 13.5" C-6 ply rated tire & had a rounded design to them.
The 39s are 12.5" E- 10 ply rated on a skinnier wheel.
@mustcamp put them on a much lighter 4Runner.
@mustcamp would know more about the on trail performance comparison of each tire better than me, what say you.
Please tell us if you continued to have chucking after I sold them to you.
I went off on a tangent...
| Size | | Diameter | Width | Tread Width | Measured | Tread | Load Range | Max Load | Max psi | Weight | Revs/Mile | | |
MileStar | 38x13.5r17 | $??? | 37.7 | 13.5 | 10.8 | 11 | 19/32 | C-6 ply | 3000 | 35 | 78 | | | |
Kanita | 39x12.5r17 | $??? | 38.8 | 12.8 | | 10 | 21/32 | E-10 ply | 3970 | 65 | 85 | | | |
FJC wheel only = 28.2 ~39" tire only = 83.6 ~ total = 111.8 lbs
Beadlock = 44.8 ~ 38" tire only = 77.4 ~ total = 122.2 lbs
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