1 / 6CAP Barbell RB-48T Standard 1-Inch Threaded Curl Bar
The CAP Barbell RB-48T is a standard threaded curl bar designed for 1-inch weight plates. Its two listed grip positions and knurled grip support varied arm exercises, while the 200-pound stated capacity sets a clear loading limit.
At a glance
- Threaded ends and star lock collars are specified for securing plates.
- The listing describes two separate grip positions for biceps and triceps exercises.
- Knurled grip and chrome-finished steel construction are listed.
Often bought together
Pros and cons
Pros
- Two grip positions offer options for arm-focused movements.
- Threaded sleeves and star lock collars provide a stated way to secure compatible plates.
- The 1-inch plate fit is useful for buyers with standard-hole plates.
Cons
- The stated 200-pound weight limit is lower than the higher capacities some buyers may need.
Technical specifications
13 specifications| Brand | CAP Barbell |
|---|---|
| Model | RB-48T |
| Weight listed | 5.1 kg |
|---|---|
| Plate compatibility | Fits 1 Standard Plate |
| Grip size | 1 inch |
| Mounting hole diameter | 1 inches |
| Material listed | Alloy Steel |
|---|---|
| Finish | Chrome |
| Grip type | Knurled |
| Weight limit | 200 pounds |
|---|---|
| Ends | Threaded Ends with Star Lock Collars |
| Grip positions | Provides 2 separate grip positions to intensify the isolation and increase upper arm size in both the bicep and triceps muscles |
| Warranty | 30-day manufacturer warranty |
|---|
What to know before buying
- The listed weight is 5.1 kg and the stated maximum load is 200 pounds. Confirm both specifications suit your setup before purchase, and use compatible 1-inch-hole plates.
What’s in the box
Included- Standard Curl Bar
Who is it for?
A good fit for
- Buyers seeking a standard 1-inch plate curl bar for biceps and triceps work.
- Home-gym users who want threaded plate sleeves and multiple grip positions.
Less suited to
- Buyers using 2-inch Olympic plates.
- Lifters who need a bar with a stated capacity above 200 pounds.

Customer reviews on Amazon
- 5 stars
75% 75% - 4 stars
12% 12% - 3 stars
8% 8% - 2 stars
1% 1% - 1 star
4% 4%
Customer feedback describes the bar positively for perceived quality, workout functionality, durability and its curved shape. Some users report missing collars, and feedback about tightness is mixed. Those concerns matter because the listing specifies threaded ends and star lock collars, so buyers should confirm the collars arrive and secure as expected. The reported experiences do not establish performance or durability for every user.
Positive themes
- Customers report positive impressions of quality and usefulness for workouts.
- The curved shape and the option for close and wide grips are appreciated by some customers.
- Some customers describe the bar as durable and useful for varied exercises.
Negative themes
- Some customers report missing collars.
Mixed feedback
- Feedback about tightness is mixed.
Frequently asked questions
What weight plates fit this curl bar?
The listing describes it as fitting standard plates with 1-inch center holes. It is not specified for 2-inch Olympic plates.
What is the stated weight limit?
The listed limit is 200 pounds. Treat that as the product's stated maximum rather than a tested capacity.
Does it have more than one grip position?
Yes. The listing describes two separate grip positions for arm exercises.

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