1. Safety Information
Please read all safety instructions carefully before assembling or using the Trex Barbell Set. Failure to follow these instructions may result in injury or damage to property.
- Consult a Physician: Before starting any new exercise program, especially with weights, consult with a healthcare professional.
- Proper Assembly: Ensure all components are correctly assembled and secured before each use. Always tighten star lock collars firmly to prevent weight plates from slipping.
- Inspect Equipment: Regularly inspect all parts for wear, damage, or loose components. Do not use damaged equipment.
- Proper Form: Use proper lifting techniques to avoid injury. If you are unsure, seek guidance from a qualified fitness instructor.
- Controlled Movements: Perform exercises with controlled movements. Avoid sudden jerking or dropping weights.
- Clear Area: Ensure your workout area is clear of obstructions and other people.
- Children and Pets: Keep children and pets away from the equipment during use and storage.
- Maximum Load: Do not exceed the maximum load capacity specified for each bar.
2. Package Contents
Your Trex Barbell Set (90 kg) includes the following components:
- 4 x 10 kg Weight Plates
- 8 x 5 kg Weight Plates
- 4 x 2.5 kg Weight Plates
- 1 x Long Barbell (167 cm, approx. 7 kg)
- 1 x Super SZ Curl Bar (120 cm, approx. 6 kg)
- 2 x Short Dumbbell Bars (42 cm, approx. 0.75 kg each)
- Multiple Star Lock Collars (chrome for long/curl bars, black for dumbbell bars)

This image provides an overview of the complete Trex barbell set, showcasing the long barbell, the Super SZ curl bar, and two short dumbbell bars. All bars are equipped with threaded ends and star lock collars for secure weight plate attachment.
3. Setup Instructions
Follow these steps to assemble your barbell or dumbbell:
- Select Bar: Choose the long barbell, curl bar, or a short dumbbell bar depending on your exercise.
- Unscrew Collar: Unscrew one of the star lock collars from one end of the bar.
- Load Plates: Carefully slide the desired weight plates onto the threaded end of the bar. Ensure the plates are centered and balanced.
- Secure Collar: Screw the star lock collar back onto the bar, tightening it firmly against the weight plates. This prevents the plates from moving or sliding off during your workout.
- Repeat for Other Side: If using a barbell or curl bar, repeat steps 2-4 for the other end, ensuring an even distribution of weight.

A detailed view of a chrome star lock collar. These collars are essential for safety, screwing onto the threaded bar ends to firmly secure weight plates and prevent them from sliding off during use.

This image shows the threaded end of a straight barbell, designed for secure attachment of weight plates. A chrome star lock collar is visible, used to fasten the plates firmly in place.

This image displays the threaded end of a curl bar, similar to the straight barbell, ensuring weight plates are securely held. A chrome star lock collar is shown, which is tightened to prevent plate movement during exercise.

This image shows a short dumbbell bar, featuring threaded ends and black star lock collars. The bar is designed for individual hand weights and includes rubberized grips for enhanced comfort and stability.
4. Operating Instructions
The Trex Barbell Set is designed for strength training exercises. Here are general guidelines for effective and safe use:
- Warm-up: Always perform a proper warm-up before starting your weightlifting session to prepare your muscles and joints.
- Start Light: Begin with lighter weights to master the exercise form before increasing the load.
- Maintain Form: Focus on maintaining correct posture and controlled movements throughout each exercise. Poor form can lead to injury.
- Breathing: Breathe properly during exercises. Typically, exhale during the exertion phase and inhale during the recovery phase.
- Progress Gradually: Increase weight, repetitions, or sets gradually as your strength improves.
- Cool-down: Finish your workout with a cool-down and stretching to aid muscle recovery.
Using Different Bars:
- Long Barbell: Ideal for compound exercises such as squats, deadlifts, bench presses, and overhead presses.
- Super SZ Curl Bar: Designed to target biceps and triceps more effectively by reducing wrist strain during curls and extensions.
- Short Dumbbell Bars: Versatile for a wide range of exercises including bicep curls, tricep extensions, shoulder presses, lunges, and rows, allowing for unilateral training.
5. Maintenance
Proper maintenance will extend the life of your Trex Barbell Set:
- Cleaning: Wipe down bars and weight plates with a damp cloth after each use to remove sweat and dirt. Avoid harsh chemicals that could damage the plastic coating or metal finish.
- Storage: Store the barbell set in a dry, cool place away from direct sunlight and moisture to prevent rust and material degradation.
- Regular Inspection: Periodically check all threaded sections, star lock collars, and weight plates for any signs of wear, cracks, or damage. Ensure collars are not stripped and still provide a secure grip.
- Lubrication (if applicable): The threaded sections of the bars generally do not require lubrication. If any part feels excessively stiff, consult the manufacturer.
6. Troubleshooting
Here are solutions to common issues you might encounter:
- Weight Plates are Loose: Ensure the star lock collars are screwed on tightly against the weight plates. If collars are worn and no longer secure, they may need replacement.
- Difficulty Screwing on Collars: Check for any debris in the threads of the bar or collar. Clean if necessary. Ensure the collar is aligned correctly before twisting.
- Rust on Metal Parts: If minor surface rust appears, it can often be removed with a fine steel wool or rust remover, followed by wiping with a lightly oiled cloth. Store in a dry environment to prevent recurrence.
- Damaged Components: If any part of the set (bar, plate, or collar) is significantly damaged (e.g., cracked, bent, or broken), discontinue use immediately and contact Trex customer support for assistance.
7. Specifications
Detailed specifications for the Trex Barbell Set (90 kg):
General:
- Brand: Trex
- ASIN: B01NCN8EUX
- Style: Classic
Weight Plates:
- Material: Plastic coating with sand-cement filling
- Hole Diameter: 26 mm
- 10 kg Plate: Diameter: 32 cm, Thickness: 5.5 cm
- 5 kg Plate: Diameter: 26 cm, Thickness: 5 cm
- 2.5 kg Plate: Diameter: 21 cm, Thickness: 4 cm
- 1.25 kg Plate: Diameter: 17.5 cm, Thickness: 3 cm

This image displays the different sizes of Trex weight plates, including their diameter and thickness. From left to right: 1.25 kg (17.5 cm diameter, 3 cm thick), 2.5 kg (21 cm diameter, 4 cm thick), 5 kg (26 cm diameter, 5 cm thick), and 10 kg (32 cm diameter, 5.5 cm thick). All plates have a 26 mm hole diameter.

This image provides a cutaway view of a Trex weight plate, illustrating its construction. The plate features a durable plastic coating over a sand-cement filling, designed for floor protection and noise reduction.
Long Barbell:
- Length: 167 cm
- Weight: Approx. 7 kg
- Diameter: 25 mm
- Material: Solid Steel
- Plate Loading Area Length: 2 x 30.5 cm
- Grip Area Length: 2 x 25 cm
- Maximum Load Capacity: 140 kg
- Collars: Chrome Star Lock Collars included
Super SZ Curl Bar:
- Length: 120 cm
- Weight: Approx. 6 kg
- Diameter: 25 mm
- Material: Solid Steel
- Plate Loading Area Length: 2 x 19 cm
- Grip Width: 81.5 cm
- Maximum Load Capacity: 120 kg
- Collars: 2 Chrome Star Lock Collars included
Short Dumbbell Bars (2 included):
- Length: 42 cm (also available in 51 cm, specific to set)
- Weight: Approx. 0.75 kg each
- Diameter: 25 mm
- Material: Hollow Steel, coated with high-quality plastic
- Grips: Rubberized hand grips
- Plate Loading Area Length (42 cm bar): 2 x 14.5 cm
- Grip Width: 13 cm
- Maximum Load Capacity: 50 kg
- Collars: Black Star Lock Collars included
8. Warranty and Support
For warranty information, product support, or to inquire about replacement parts, please contact Trex customer service through your original point of purchase or visit the official Trex website. Please have your product model (90 kg Set) and ASIN (B01NCN8EUX) available when contacting support.