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Product guide

CAP 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.
Price
$27.71Save 15%

Reference price: $32.60

Price checked: Nov 14, 2026

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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
Identity
BrandCAP Barbell
ModelRB-48T
Dimensions and installation
Weight listed5.1 kg
Plate compatibilityFits 1 Standard Plate
Grip size1 inch
Mounting hole diameter1 inches
Materials and protection
Material listedAlloy Steel
FinishChrome
Grip typeKnurled
Capacity and construction
Weight limit200 pounds
EndsThreaded Ends with Star Lock Collars
Grip positionsProvides 2 separate grip positions to intensify the isolation and increase upper arm size in both the bicep and triceps muscles
Package and warranty
Warranty30-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.
CAP Barbell RB-48T Standard 1-Inch Threaded Curl Bar · photo 2
Additional product photo 2

Customer reviews on Amazon

4.5 / 5 · 395 ratings
  • 5 stars75%75%
  • 4 stars12%12%
  • 3 stars8%8%
  • 2 stars1%1%
  • 1 star4%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.

CAP Barbell RB-48T Standard 1-Inch Threaded Curl Bar · photo 3
Additional product photo 3

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