CAP Barbell Standard 1-Inch Threaded Curl Bar with Collars
- Bar
- 200 pounds
- Knurled
- Chrome
- More reviewed than 56%
A basic, well-specced curl bar for anyone already on the standard 1-inch plate system, limited mainly by its short warranty window.
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How it ranks among the 101 bars we track
4.4★ across 392 Amazon ratings, Bayesian-smoothed toward the category average.
392 Amazon ratings, weighted on a log scale so huge counts don't drown everything.
Brand identity, imagery, description and spec coverage.
The ProductDome score is separate from the Amazon rating shown above: it combines the Bayesian-smoothed Amazon rating with evidence volume, tracked demand, and data quality across the 101 bars we track - how the scorecard works · full bars data report. Confidence: medium - useful but incomplete evidence.Last refreshed Jul 5, 2026. Data-computed, not a hands-on test. Compiled by the ProductDome Research Team.
Overview
A solid steel curl bar with a chromed finish and threaded ends that lock standard 1-inch plates in place with star collars, giving two grip positions to isolate biceps and triceps on the same bar.
CAP positions this as a combined triceps bar and curl bar in one piece, with diamond knurling along the grip zones for a secure hold during pressdowns and curls. It ships with a 30-day manufacturer warranty, which is short compared with typical strength equipment coverage.
- Solid steel with chromed finish
- Threaded ends with star lock collars
- Two grip positions for biceps and triceps
- Fits standard 1-inch plates
Who it's for
Lifters who already own a standard 1-inch plate set and want a dedicated curl bar for arm isolation work, not anyone using Olympic 2-inch sleeve plates.
Strengths and trade-offs
Drawn from this product's published specifications.
- Two grip positions for biceps and triceps
- Chromed steel resists rust and wear
- Star lock collars secure plates in place
- Only a 30-day manufacturer warranty
- Fits 1-inch plates only, not Olympic sleeves
Performance notes
The chromed steel and diamond knurling are what carry the bar through repeated curls and pressdowns without the grip zone wearing smooth, and the star lock collars thread onto the ends to keep plates from sliding mid-lift.
Specifications
| Brand | CAP |
|---|---|
| Model | RB-48T |
| Dimensions & fit | |
| Weight Capacity Maximum | 200 pounds |
| Item Weight | 11.24 pounds |
| Grip Size | 1 inch |
| Construction & materials | |
| Finish Type | Chrome |
| Material | Alloy Steel |
| Included components | |
| Unit Count | 1 |
| Other details | |
| Grip Type | Knurled |
| Part Number | RB-48T |
Other CAP bars
How it compares
This product against the closest alternatives we track in bars.
| Product | Amazon rating | Ratings | ProductDome score |
|---|---|---|---|
| CAP Barbell Standard 1-Inch Threaded Curl Bar with CollarsThis product | 4.4 / 5 | 392 | 4.2 / 5 |
| Everyday Essentials Olympic Super Curl Barbell Curl BarEveryday | 4.7 / 5 | 3,900 | 4.4 / 5 |
| Olympic EZ Curl Barbell Bar 47"Olympic | 4.7 / 5 | 1,000 | 4.4 / 5 |
| ExtreSpo 47" EZ Curl Bar Weight Lifting BarExtreSpo | 4.6 / 5 | 1,300 | 4.3 / 5 |
| Yaheetech 7-Foot Olympic Barbell with CollarsYaheetech | 4.7 / 5 | 2,000 | 4.3 / 5 |
Similar bars from other brands
Questions about the CAP RB-48T
Common buyer questions answered straight from the product spec data - no fluff, no "it depends".
What size plates fit the CAP RB-48T curl bar?
It takes standard 1-inch plates, not Olympic 2-inch sleeves.
How many grip positions does this curl bar offer?
Two, letting you target biceps and triceps differently on the same bar.
What is the warranty on the CAP curl bar?
CAP backs it with a 30-day manufacturer warranty.