adidas adizero Prime X 2 Strung - Blue - UK 4

No, the adidas Adizero Prime X 2 Strung intentionally exceeds the World Athletics' maximum stack height regulations (40mm). While offering superior performance, it is not eligible for use in sanctioned competitive races.

This shoe is ideal for long-distance training runs, tempo runs, and non-sanctioned races where you want maximum cushioning, energy return, and efficiency. It excels in efforts where performance and comfort over many miles are key.

Gently wipe down the upper and midsole with a damp cloth and mild soap. Use a soft brush for the outsole. Avoid machine washing or using harsh detergents. Always air dry at room temperature away from direct heat.

The stack height is 50/43.5mm (heel/forefoot), and the shoe weighs 315g (for a UK 8.5/US 9.5). These specifications contribute to its exceptional cushioning and energy return.

STRUNG is an innovative upper construction where threads are precisely placed layer by layer. This allows for targeted support and flexibility, creating specific expansion zones in the forefoot and a securely locked-in feel in the midfoot and heel, optimizing fit and comfort.

The Adizero Prime X 2 Strung is designed with a regular fit, which generally means it should fit true to your standard running shoe size. However, individual foot shapes can vary, so trying them on is always recommended if possible.

The Continental rubber outsole is known for its high durability and excellent grip in various conditions. Its advanced compound is designed to offer smooth, flexible traction and withstand the rigors of high-mileage running.

The dual carbon plates and high stack of foam can feel firm initially. Give the shoes a few shorter runs (20-30 minutes) to break them in and allow the materials to adapt to your stride. Ensure laces aren't overtightened.

Re-evaluate your lacing technique to ensure a secure midfoot lockdown. Experiment with different lacing patterns if necessary. Also, ensure you are wearing appropriate running socks that prevent friction and provide a snug fit.

Check your sock thickness and material; moisture-wicking socks are recommended. Ensure the shoe size is correct – a shoe that's too small or too large can cause issues. If discomfort persists, consider if your running form might need adjustment or if the shoe's characteristics are not ideal for your foot strike.

While Continental rubber is highly effective, ensure the outsole is clean and free of debris (mud, small stones) that could compromise grip. Adjust your stride on very wet or loose surfaces to account for reduced traction, as no shoe can provide perfect grip in all extreme conditions.

The STRUNG upper is durable, but avoid activities that put excessive strain on specific areas, such as kicking objects or scraping against abrasive surfaces. Clean regularly to prevent dirt buildup from weakening fibers. Ensure your foot is not excessively rubbing against the upper due to improper fit.