DISC CLAMPS AND SPRINGS

Domande frequenti - Collar & spring

• What is the difference between 28 mm and 50 mm collars?
  The diameter refers to the size of the barbell sleeve onto which the collar is fitted. Olympic weightlifting and powerlifting barbells have sleeves with a diameter of 50 mm and require 50 mm collars. Standard barbells, curl bars and pump class bars have Ø 28 mm sleeves and require specific collars. Using a collar of the wrong size is either impossible or will damage the sleeve.
• Which weightlifting collar provides the best support during weightlifting exercises?
  For the snatch, clean & jerk and other lifts involving repeated drops to the floor, the quick-release lever lock collar offers the best combination of hold and speed of application. The screw-type spin collar holds just as well but takes longer to close and open. Clamp springs are the least effective solution under impact loads.
• Are steel springs sufficient for strength training?
  For squats, bench presses, deadlifts and movements where the barbell is not released from above, the steel springs hold up well even under heavy loads. They become less reliable when the barbell is subjected to sudden vibrations, such as during Olympic weightlifting drops or high-speed thruster sets.
• Are Sidea collars compatible with barbells from other manufacturers?
  Yes, compatibility depends solely on the diameter of the sleeve. A Ø 50 mm collar fits any standard Olympic barbell, regardless of the manufacturer. Just check that the sleeve falls within the standard dimensional tolerance (49.5–50 mm), a requirement met by virtually all Olympic barbells on the market.
• How many weight plates are needed for a barbell?
  You always need two collars per barbell, one on each side. Sidea sells the collars in pairs for this very reason: springs, spin collars and lock collars are supplied as a set of two identical pieces, ready for use on a single Olympic or standard barbell.
• Is a plastic collar as strong as a metal one?
  It depends on the locking system, not on the material itself. Lock collars made of reinforced technopolymer with an internal seal perform exceptionally well under repeated drops because the pressure is generated by the cam mechanism. The holding power of steel springs depends on the elasticity of the metal. In intensive weightlifting contexts, the critical factor is the mechanism, not the alloy.
• How do you look after collars over time?
  Lock collars and spin collars require periodic cleaning of the locking mechanism to remove magnesite dust and residue that may impair smooth operation. The steel springs must be kept away from prolonged exposure to moisture to prevent rust. No collar requires routine lubrication under normal conditions of use in the weights room.
• Do you need specific collars for bumper plates as opposed to cast-iron plates?
  You don’t need a specific collar. A 50 mm lock collar or spin collar will secure both rubber bumper plates and cast iron discs equally well. The difference in use lies in the type of training: bumper plates are used for drop exercises and require impact-resistant collars, whilst cast iron discs in the weight room can also be secured with traditional spring-loaded collars.
• Can I use the Collar Lock Pump Bar on an Olympic barbell?
  No. The Collar Lock Pump Bar 1657 is designed for Ø 28 mm sleeves on pump-class barbells and standard bars. An Olympic barbell has Ø 50 mm sleeves and requires 50 mm collars such as the Lock Collar 9016/1, the Spin Collar 9016 or the 9019 springs.
• Is the collar included with the barbell?
  Generally speaking, no. Weightlifting and powerlifting barbells are sold without collars, which are regarded as separate accessories because the choice of locking system depends on the intended use. Some rack kits and complete Sidea sets include a pair of springs as standard, but for professional use it is always advisable to choose the collar specifically suited to your operating environment.
• What instalment payment options are available?
  Sidea offers a range of instalment payment options to make it easier to purchase professional equipment. Please see the dedicated page: Sidea Payment Options.
• I’m a fitness professional – can I get special rates?
  If you work in the fitness or sports sector, register on the website as a Professional or as an ASD to gain access to the price list reserved for industry professionals. Pro registration allows you to view exclusive discounts and special terms across the entire Sidea catalogue.
• Is Sidea listed on the MEPA for public sector procurement?
  Yes, Sidea is an authorised supplier on the MEPA (Public Administration Electronic Marketplace). Public bodies, schools, universities, local authorities and public sports facilities can purchase Sidea equipment via the Acquisti in Rete PA platform. For information on product codes and direct MEPA orders, please contact Sidea customer service.
• What are Sidea’s returns and warranty terms?
  Sidea guarantees the right to cancel within 14 days of delivery for all online purchases, in accordance with current legislation. Products must be returned undamaged and in their original packaging. For full details on returns, refunds and the warranty, please see the Terms and Conditions of Sale page.
• Why choose Sidea equipment?
  Sidea has been designing and distributing professional fitness equipment since 1999: over 25 years’ experience serving gyms, sports coaches, CrossFit boxes, personal training studios and enthusiasts of advanced home fitness. Official distributor for StrongFirst and Luxiaojun, exhibiting at the FIBO international trade fair and technical sponsor of the Summit of Strength. Every product is developed with a focus on durability, functionality and suitability for real-world use. The Gym Design service offers bespoke design with 3D renderings. A warehouse covering over 4,000 m² in Gambettola (FC) ensures rapid order fulfilment, direct technical advice and a special price list for professionals and amateur sports clubs (ASD).