Customer Support

Installation Instructions

Before installing wheels:

1. Prior to mounting tires, please verify that the wheel size, number of holes, bolt circle diameter, offset, configuration of the mounting sides, and nuts are compatible with the vehicle. Then test fit the wheels to the hub to confirm clearance.
2. Observe the load rating decal on the wheel. Do not exceed the vehicle weight or tire diameter specified.
3. Check that the attachment nuts match the thread diameters and pitch on the vehicle. Also, the seats of the nuts that hold the wheels are of three types: tapered, rounded and flat. Should the shape of the nuts not match the wheel, they will not properly tighten and could come off while the vehicle is moving.
4. Always use new accessory valves. If the valves are not properly inserted in the valve holes, air leaks may occur. Also, please do not reuse valves once they have been removed.
5. After the tires are mounted, adjust the balance of all the wheels. Improper balance can cause vibration during driving. It is also advisable to have the wheels aligned.
6. Tighten nuts to the recommended torque of the vehicle manufacturer. If an impact wrench is used, first tighten to a low torque and then use a torque wrench to tighten the lug nut to the recommended torque.

Multi-Piece wheels:

1. Multi-piece wheels require extra care when mounting tires. These wheels may have a special sealant between the rims and the centers. This seal must not be touched with any tire mounting tools. If a tool contacts this area, the seal may be damaged and cause a leak.
2. When the tire valve is close to the seal, use caution in installing and removing the valve to prevent damage to the seal.
3. DO NOT TIGHTEN THE SMALL WHEEL ASSEMBLY BOLTS. They are torqued to 25 foot-pounds at the factory and should not need retightening. If any appear loose, contact ForgeLine for instructions.

After the wheels are installed on the car:

1. After the wheels have been fitted onto the vehicle, check that they do not come into contact with any part of the body or the suspension system. (When checking the front wheels, turn the steering wheel all the way left and right.)
2. Before driving, always check the air pressure in the tires. For low profile tires in particular, insufficient pressure reduces the tire’s ability to absorb impact and induces added stress on tires and wheels.
3. The lug nuts can become loose during the first 100 miles after the wheels are fitted or rotated. Use a torque wrench to make sure the nuts are at the recommended torque.

Forgeline prohibits doing modifications to the wheels. Modifications that include machining, welding or disassembling are extremely dangerous and can reduce the wheel strength or cause air leaks that can lead to broken parts or accidents. We will not acknowledge any claims concerning wheels that have been modified by the user.

Thank you for purchasing Forgeline Wheels. Any questions should be directed to our service department at or by calling 1-937-299-0298.

Installation Instructions for Forgeline Pin-Drive Center-Lock Wheels


• Read before mounting tire on wheels. Wheels cannot be returned for fitment reasons after tires have been mounted.

• Stud length exceeding one and one-half inch (> 1 1/2") will not allow wheels to be tightened properly. Read and observe all warning and instruction labels affixed to wheels. Installer must not exceed load rating specifications.


1. Use studs longer than 1-1/2".
2. Install adapters on wrong side of car.
3. Use parts that are worn out.
4. Fail to retighten caps.
5. Tow vehicle backwards.
6. Fail to use safety lock pins


Clean Hubs
Clean and inspect hubs and brake drums for any obstructions, (lock clips, rivets, balancing weights, etc.). Remove or resolve any obstruction that prevents a flush fit between the adapter and the axle hub.

Install Adapters

Note: Right side (passenger side) adapters have reverse threads and a single line machined on the outside edge of plate. Left side (driver’s side) adapters have right hand threads and no line.
Check stud length. If the stud is longer that 1-1/2" long cut the stud to shorten or use a spacer behind the adapter.
To install, correctly place left adapter on left side of car (Driver’s Side – U.S. Spec. Vehicles). Right adapter must be installed on right side of car. Adapters must be installed with the supplied pin-drive lug nuts. NO SUBSTITUTIONS! THIS IS IMPORTANT! DO NOT INSTALL ANY OTHER WAY !
After adapters have been placed on hubs, be sure that adapter plate fits flat against hub and hub mounting pad. If there is any interference point of contact must be found and any high point removed. If this is not done, wheels will not run true when installed.
When tightening pin-drive lug nuts:
– Minimum thread engagement must be at least one times the diameter of the stud i.e., the typical thread engagement for a ½” x 20 thread would be a minimum of 1/2," of thread.
– If spacers are used, be certain that the spacer is in place during this inspection.
– Do not lubricate the pin-drive lug nuts or stud threads. Run all pin-drive lugs up fully before tightening.
– Tighten all pin-drive lug nuts using a criss-cross pattern to assure an even distribution of pressure while tightening.
– Once installed, adapters should rotate freely by hand with no rubbing or interference.
– Apply a thin coating of anti-seize or grease to threads of adapter.
– Also, place a thin coating of grease on taper or bevel on back of the centerlock nut and in the threads. Keep dirt away from threads.
Be certain that you use the proper Forgeline pin-drive lugs for your specific Forgeline Centerlock Wheel. Use of any other lug nut can create an unsafe condition and void your warranty.

Fit Wheels

Place wheels on adapters, aligning the pins with the corresponding holes on the back of the wheel center. Push the wheel firmly toward the back of the adapter. When the rear of the wheel center is sitting on the back of the adapter, rock the wheel so that the drive pins engage completely and firmly.

Thread On Nut

Thread nut on the adapter. Note proper tightening direction. Right side nuts and adapters have reverse threads and a single line machined on the outside of them. Left side nuts have right hand threads and no line on side of cap. "Left side" nuts must be used on the left side (Driver’s Side) of car and "Right side" caps must be used on right side of car. Note: Right side GT Style Nuts do not have line machined on them, but do have reverse threads.

Tighten Nut

Nuts on right side of the car will tighten counter-clockwise, nuts on left side will tighten clockwise.
While car is still on jacks run the centerlock nuts up tight. All nuts must be tightened with a Forgeline 25” wrench.


Spin wheels by hand to make sure there is no rubbing against brake calipers and wheel spins straight. Also, rock wheel assembly to verify that the nut has seated completely in the wheel. Assembly should be very solid, with no rocking movement noticeable.

Retighten Caps

Lower the car and tighten the nuts until there is no movement with 150 + pounds (entire body weight) at the end of the 25” breaker bar. If torque wrench is available, torque to 300 ft-lbs.

Install Safety Pins

Push safety pin through hole in adapter and attach clip.

Run-in and retighten

After the car has been run 25 miles, be sure to re-check the nut for tightness. The wheels seat themselves on the adapters after the initial run-in and nuts can be tightened further. THIS IS VERY IMPORTANT.


7/16" 60
1/2" 80
12mm 80
14mm 90

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