Halibrand Threaded Adapter Question

[Ron J]

Here is an arcane question.

The spinners adapters for the FFR supplied Halibrand Wheels are left and right hand thread. The FFR Instruction Sheet (Revision B, Effective Date: 2/6/2019) says the left hand thread spinners go on the right side (passenger) of the car and the right hand thread spinner goes on the left side (driver) side of the car.

Back in the day when I drove a 1958 Desoto Firedome the driver side lug nuts were left hand thread and the passenger side lug nuts were right hand thread (opposite of FFR Instruction Sheet). At that time the logic stated the lug nuts would tend to tighten when stopping. I never quite grasped that logic. Also, this is reverse of the Halibrand Instruction Sheet.

Can anybody explain the logic why the spinner adapters are installed as prescribed in the FFR Instruction Sheet {left thread to right side & right thread to left side), or is there a standard convention in the race world that has been adopted.?

Ron

[Jeff Kleiner]

Physics. It’s because the forward rotation of the wheels will naturally want to tighten them. The opposite would allow them to loosen.

Jeff

[Ron J]

Physics. It’s because the forward rotation of the wheels will naturally want to tighten them. The opposite would allow them to loosen.

Jeff
Except that it appears FFR installation would actually loosen the spinners when braking. They say to rotate the spinners clockwise on the passenger side and counterclockwise on the driver side to loosen. Jy head hurts.

[Papa]

Except that it appears FFR installation would actually loosen the spinners when braking. They say to rotate the spinners clockwise on the passenger side and counterclockwise on the driver side to loosen. Jy head hurts.

The L and R labels are not indicating which side of the car they go on, but the thread direction (Right hand and Left hand). The L spinners go in the passenger (right) side of the car and the R spinners go on the driver (left) side of the car. Clear as mud, right?

[cob427sc]

You're correct. The natural answer would be to put the left hand on the drivers side as the momentum would cause the spinner to tighten under braking. That's the wat I have always installed them and never had one loosen.

[edwardb]

As several have stated, the right hand thread (clockwise) goes on the left side of the car, and the left hand thread (counter clockwise) goes on the right side of the car.

My personal trick to remember is when you tighten the spinner, the top should turn towards the back of the car. Makes my head hurt a little less.

[CDXXVII]

Just remember, the passenger is always wrong. :cool: