First, we will always strive to drive our costs down. However, we are self-funded which led to a small initial production run. As we grow, our manufacturing costs will come down and allow us to reduce the price per unit. On a positive side, we have no investors to answer to.

Another big factor that adds cost is U-cups® are made in America from high grade steel (A36 carbon plate) with HDPE plastic inserts. We’re proud our product is made in the USA and chose not to manufacture or buy cheaper steel from sources overseas. This lets us guarantee that your U-cups® will last a lifetime and our warranty backs that up.

Third, calves are very strong muscles so we wanted to make sure U-Cups® could easily support barbells loaded up with 1000 lbs.

Here are some key facts about the quality and durability of U-Cups®:

• Craftsmanship: U-Cups® are handcrafted in Texas by local workers who take immense pride in their work. Each piece is carefully built to meet the highest standards of quality, ensuring longevity and durability.

• American Steel: We use premium American (A36 carbon plate) steel for the construction of U-Cups®. Although more expensive, this steel is known for its strength, durability, and longevity.

• Exceptional Warranty: We want our all customers to rest assured their U-cups® will last a lifetime. We back this up with a full lifetime warranty against structural failure.

• Customization Options: We offer a range of sizes for the adapter bracket and pin to provide compatibility with most racks on the market.

• Local Labor: By producing U-Cups® in Texas, we support local jobs and contribute to the growth of our community. The expertise of our local craftsmen is reflected in the quality of each product.

There are four important reasons why you should use U-Cups® for standing calf raises:

1. U-Cups® are literally the only solution available (utility patent protected) that allow rack-owners to safely challenge their calves and stabilizers using a barbell for free-weight movements. Free weight standing calf raises with a barbell will take your calf-training to a whole new level and provide amazing results compared to the “guided movement” machines provide.

2. U-Cups® save you floor space and utilize your existing equipment. Most home-gym owners realize the advantage that power racks offer with free-weight exercises. Many do not have the extra space (or extra money) for a Smith machine or a standing calf raise machine.

3. When was the last time you saw a calf machine that let you lift 1,000 lbs?

4. Simple and efficient design with zero moving parts. A pair of U-Cups® will last a lifetime. We back this up with a full lifetime warranty against structural failure.

U4C Fitness is 100% self-funded which unfortunately means we were limited in the scope of our initial production run. We chose the most common rack post sizes 3x3 vertical post with 1” and 5/8” pin options.

U-Cups will soon be available for a number of other rack post sizes including (width x depth): 3”x2”, 2”x3”, 2”x2” -- As well as pin hole sizes measuring: 1", 5/8", 11/16”, 3/4”, 26mm.

Here is a list of racks we currently support as of June 2025:

• Bells of Steel Hydra Series - 3"x3" - 5/8"
• Griffin GR3 - 3"x3" - 1"
• Griffin GR3 Lite - 3"x3" - 5/8"
• PRX Build Limitless - 3"x3" - 5/8"
• Rep PR-5000 - 3"x3" - 1"
• Rep Omni - 3"x3" - 1"
• Rep Apollo Half Rack - 3"x3" - 1"
• Rep PR-4000 - 3"x3" - 5/8"
• Rogue Monster - 3"x3" - 1"
• Rogue Monster Lite - 3"x3" - 5/8"
• Sorinex Power Racks - 3"x3" - 1"
• Titan X-3 - 3"x3" - 11/16"
• Titan Series Power Rack - 3"x3" - 26mm
• Titan Series 24 - 3"x3" - 26mm
• And any other rack with 3"x3" uprights with 5/8" or 1" pin holes.

Please subscribe to our newsletter (located on our site footer) to be notified when new sizes are available.

As U4C Fitness grows, we will be able to create U-Cups® for racks with less common adapter and hardware styles. If you are a business with questions about a specific type of adapter, we would be eager to discuss it further. Please email us at connect@u4cfitness.com or submit a question here.

U-Cups® are not recommended for anyone whose shoe size is large enough to lift the barbell up and out of the 11" U-shaped chamber after pushing all the way up using a calf raise block.

Payment financing is coming very soon. Once available, there will be numerous plans available for selection during the checkout process.

Please review our returns and exchange policy here

At this time we don’t offer free shipping on new purchases. However, we do at times run specials which include free shipping opportunities.

Yes. Please contact us here with your shipping address and country. We are partnered with a 3rd party shipping service that provides rates typically lower than UPS, DHL, FEDEX and USPS Worldwide services. Once you submit your information, we will run a few estimates and reply back with options.

Yes. After placing your order, you will receive an order confirmation email which will include your shipment tracking number for the shipping carrier you selected at checkout.

U-Cups® are shipped from Texas and the shipping times will vary based on your selected shipping method and location. You can see shipping options and estimated delivery times during the checkout process.

We will happily replace your U-Cup wear pads for the life of the product. Please contact our customer support team with the reason for the replacement and they will contact you regarding the replacement.

Please contact our team with any question and we will get back to you ASAP regarding your inquiry.

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