I made a mistake that could have been very expensive.
In December I purchased aftermarket MB Icon wheels and WS80 winter tires to share between our '13 Corolla and '01 Camry. I installed them on her Camry with some Dorman spline drive nuts and she was using them until this weekend. I put the same wheel & nut combo on the Corolla for the 600 mile road trip this weekend, based upon a prediction of freezing rain that never happened.
We got back today and while taking them off I noticed how quickly the nuts came off. I counted the turns on the rest and found the wheels were held on with only 7 1/2 threads on the rear and ONLY 6 1/4 THREADS on the front... 12 threads is safe minimum (I do not know how much engagement the Camry had, I will check when the proper nuts arrive.)
Fortunately, nothing happened during the trip, the nuts where still tight, and the originals went on smoothy so I didn't do any damage with my oversight... but I got lucky.
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If you buy aftermarket wheels, especially for your Toyota, you may need "ET" lug nuts (extra threads in shank below seat) to get enough thread engagement. Rule of thumb is to have 1.5x as much thread engagement as the stud is wide.
For taper seat wheels, ET taper seat lug nuts come with .25 to around .5 inch (6 to 13mm) length shanks. Your needs will vary by wheel and vehicle.
Formula; Divide stud diameter by thread pitch to get minimum thread engagement...
Minimum
12mm ÷ 1.25mm x 1.5 = 14 1/2 threads
12mm ÷ 1.50mm x 1.5 = 12 threads
14mm ÷ 1.50mm x 1.5 = 14 threads
In December I purchased aftermarket MB Icon wheels and WS80 winter tires to share between our '13 Corolla and '01 Camry. I installed them on her Camry with some Dorman spline drive nuts and she was using them until this weekend. I put the same wheel & nut combo on the Corolla for the 600 mile road trip this weekend, based upon a prediction of freezing rain that never happened.
We got back today and while taking them off I noticed how quickly the nuts came off. I counted the turns on the rest and found the wheels were held on with only 7 1/2 threads on the rear and ONLY 6 1/4 THREADS on the front... 12 threads is safe minimum (I do not know how much engagement the Camry had, I will check when the proper nuts arrive.)
Fortunately, nothing happened during the trip, the nuts where still tight, and the originals went on smoothy so I didn't do any damage with my oversight... but I got lucky.
------------------------------------------------
If you buy aftermarket wheels, especially for your Toyota, you may need "ET" lug nuts (extra threads in shank below seat) to get enough thread engagement. Rule of thumb is to have 1.5x as much thread engagement as the stud is wide.
For taper seat wheels, ET taper seat lug nuts come with .25 to around .5 inch (6 to 13mm) length shanks. Your needs will vary by wheel and vehicle.
Formula; Divide stud diameter by thread pitch to get minimum thread engagement...
Minimum
12mm ÷ 1.25mm x 1.5 = 14 1/2 threads
12mm ÷ 1.50mm x 1.5 = 12 threads
14mm ÷ 1.50mm x 1.5 = 14 threads
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