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199
4-1. Before driving
4
Driving
4RUNNER (U)
Use the correct trailer ball for your application.
Trailer ball load rating
Matches or exceeds the gross
trailer weight rating of the trailer.
Ball diameter
Matches the size of the trailer cou-
pler. Most couplers are stamped
with the required trailer ball size.
Shank length
Protrudes beyond the bottom of the lock washer and nut by at least 2
threads.
Shank diameter
Matches the ball mount hole diameter size.
Selecting trailer ball
1
2
Trailer class Typical trailer ball size
IV
2 5/16 in.
II and III
2 in.
I
1 7/8 in.
3
4
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