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Aluminum Olympic Clamp Collars (Pair) - Lever Compression Bar Clamps – IRON COMPANY (IC-ROC)

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Available in Red, Black, Silver Aluminum
USA Made
Olympic Bar and Weight Plates NOT Included


IRON COMPANY IC-ROC Roepke Aluminum Olympic Clamp Collars - The Roepke Olympic Clamp Collars from IRON COMPANY are clamp collars with a compression lever constructed from solid aluminum for use in securing weight plates onto an Olympic barbell, such as a hex bar or trap bar. IRON COMPANY IC-ROC aluminum clamp collars are simple, fast, reliable, and durable. The solid extruded aluminum structure of the Roepke bar clamps is not only rust resistant but also offers all the strength without the weight or bulk of traditional steel or iron collars. The design of the collar is very slim, taking up only one inch of space on a bar sleeve. Unlike many clamping collars which take up 2 to 2-1/2 inches of space, the Roepke collars allow more room for "heavy loading" especially when using thicker bumper plates for controlled movements. The IRON COMPANY Roepke Olympic Collars are designed for non-impact or low-impact strength training movements such as squats, bench press, deadlifts, upright rows, shrugs, curls, and other heavy duty training exercises where weight plate stability and security is desired for peace of mind and safety. Minimalist in size and weighing only a pound total for the pair, these virtually indestructible compression collars make a great addition to your gym bag training arsenal. 

Army Hex Bar Collars – Our Army Hex Bar Collars are specifically made to fit securely on our Army Combat Ready Hex Bar with sleeves made from “schedule 80" pipe, which is 1.90” in diameter. Schedule 80 pipe is a smaller diameter than regular Olympic bars and therefore not compatible with regular diameter Olympic collars, such as spring collars, which will only spin on schedule 80 pipe with no holding power whatsoever. Only order the Army Hex Bar Collars if you intend on using them with a schedule 80 sleeve bar.

Instructions - To use the Roepke barbell clamps, open the lever to allow the Olympic bar sleeve to fit snugly inside against the curved portion of the collar. Next, firmly press down on the lever until it comes to rest against the bar sleeve. The lever action will compress the collar in a squeezing fashion around the bar sleeve to create an ultra-tight grip. Rubber grommets on the inside of the collars not only protect the bar sleeve from scratching but also allow for some variances in Olympic bar sleeve diameter when slightly larger or smaller than standard 2 inches (50mm). The pair of Roepke clamping collars will hold in place against up to 255 pounds of weight plates dropped from 5 feet.

Purchase IRON COMPANY Aluminum Olympic Collars on GSA contract – IRON COMPANY USA Made free weight equipment can be purchased from IRON COMPANY® on GSA Contract GS-07F-0104M and CMAS Contract 4-12-78-0066A.

Shipping Included
Shipping cost included within the lower 48 states only
Ships via FedEx Ground


  • Sold as a PAIR.
  • Olympic and Army Hex Collars sold in red, black and silver. Both look exactly the same but have a different diameter.
  • Olympic Collars: Adjustable fit for all 2" diameter (50mm) Olympic style bars.
  • Army Hex Bar Collars: Smaller diameter for use on hex bars with 1.90" schedule 80 pipe ONLY.
  • Compression lever clamp design.
  • 1" thick design allows for more weight to be loaded onto bar sleeves.
  • Offset to allow for ease of locking.
  • Made of solid aluminum.
  • Virtually indestructible.
  • Rust resistant.
  • Tested on bars with 255 pounds of weight dropped from 5 feet.
  • Weight: 1 lb. (pair) | 0.5 lbs (individual).
  • Olympic bar and Olympic weight plates sold separately.
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    • Olympic Collars: Compatible ONLY with 2" diamter bar sleeves.
    • Army Hex Bar Collars: Compatible ONLY with 1.90" diameter schedule 80 pipe bars. 
    • Compression lever clamp design.
    • Made from high strength, rust resistant solid aluminum. Won’t crack and is not vulnerable to UV like plastic.
    • 1" thick design allows for more weight to be loaded onto bar sleeves.
    • Rubber insert keeps collars on tight even during bumper plate training in CrossFit workouts. Won’t loosen, slide, rust and /or break like spring collars.
    • Offset to allow for ease of locking.
    • Easy to apply and remove for any size and strength trainee.
    • Virtually indestructible.
    • Tested on bars with 255 pounds of weight dropped from 5 feet without sliding.
    • Weight: 1 lb. (pair) | 0.5 lbs (individual)
    • Warranty against manufacturer defects: 2-years. Does not cover finish or stickers.
    • Made In USA


    • Warranty against manufacturer defects: 2-years. Does not cover finish or stickers.