CAP 2" Olympic Triceps Bar
- Bar
- 200 pounds
- Knurled
- Black
- Better rated than 57%
A solid, inexpensive way to add dedicated neutral-grip triceps and curl work to a home gym that already runs 2-inch Olympic plates.
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How it ranks among the 101 bars we track
4.7★ across 219 Amazon ratings, Bayesian-smoothed toward the category average.
219 Amazon ratings, weighted on a log scale so huge counts don't drown everything.
100+ bought on Amazon last month.
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
CAP's OBIS-34SB is a 34-inch neutral-grip specialty bar built for triceps extensions, skull crushers, hammer curls and close-grip presses. It takes 2-inch Olympic plates and carries a 200 lb capacity, sized for home and garage gyms.
This is an isolation bar, not a stand-in for a straight barbell: the compact frame and vertical handles exist specifically to keep the hands neutral through overhead and pressing arm work. Reviewers with wrist issues note the grip angle is noticeably easier on the joints than a flat bar. One caveat from an owner: the plate-locking expanders have a small metal tab that can catch a finger if you're not paying attention.
- 34-inch cold-rolled steel frame
- 6.5-inch independently rotating sleeves
- Medium-depth knurled grip
- 200 lb weight capacity
Who it's for
Suits home gym owners who already have 2-inch Olympic plates and want a dedicated arm-isolation tool for triceps, biceps and shoulder work. It is not a replacement for a main working barbell used in squats, bench or deadlifts.
What buyers say
From Amazon customer reviews.
Owners consistently call it a solid curl and triceps bar for the price, with the vertical grip singled out as easier on a bad wrist than a flat bar. One buyer flagged that the metal tabs on the plate-lock expanders can poke your hand if you're not careful.
Strengths and trade-offs
Drawn from this product's published specifications.
- Neutral grip eases wrist and elbow strain
- Revolving sleeves stop plates twisting mid-set
- Compact 34-inch frame keeps load centered
- Fits standard 2-inch Olympic plates
- 200 lb capacity caps loading versus a full barbell
- Plate-lock expanders have a sharp tab per one owner
Specifications
| Brand | CAP |
|---|---|
| Model | OBIS-34SB |
| Dimensions & fit | |
| Weight Capacity Maximum | 200 pounds |
| Item Weight | 19.3 pounds |
| Shaft Length | 17.5 inches |
| Item Dimensions L x W | 34.2 × 6.7 inches |
| Grip Size | 8.2 inches |
| Sleeve Length | 8.2 inches |
| Construction & materials | |
| Finish Type | Black |
| Material | Alloy Steel |
| Other details | |
| Grip Type | Knurled |
| Part Number | OBIS-34SB |
Other CAP bars
How it compares
This product against the closest alternatives we track in bars.
| Product | Amazon rating | Ratings | ProductDome score |
|---|---|---|---|
| CAP 2" Olympic Triceps BarThis product | 4.7 / 5 | 219 | 4.1 / 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 |
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Questions about the CAP OBIS-34SB
Common buyer questions answered straight from the product spec data - no fluff, no "it depends".
What is the CAP OBIS-34SB triceps bar used for?
It's a specialty bar for overhead triceps extensions, skull crushers, hammer curls and close-grip neutral presses, not general barbell training.
What plate size fits the CAP triceps bar?
It takes standard 2-inch Olympic plates on its 6.5-inch rotating sleeves.
How much weight can the CAP triceps bar hold?
The bar is rated for a 200 lb capacity.