Last updated: April 2026 | Reading time: 8 min | Author: T-K
Table of Contents
- Why Heel Height Matters
- 16mm vs 20mm vs 22mm: The Differences
- Which Heel Height Is Right for You?
- The Castiron Lift Range
- FAQ
The heel height of a weightlifting shoe is the single most important specification for squatting performance. It determines how much ankle dorsiflexion is required to reach depth, how upright the torso can be, and how much knee travel is possible. For UK and European lifters choosing their first or next squat shoe, understanding heel height is essential.
Why Heel Height Matters
The raised heel compensates for limited ankle dorsiflexion — the most common limiter of squat depth for UK and European lifters. By elevating the heel:
- Less ankle dorsiflexion is required to reach depth, allowing deeper squats immediately
- The torso stays more upright, reducing lower back stress and improving bar path
- The knees can travel further forward, increasing quad activation
- Squat depth improves immediately — no mobility work required to see the benefit
Research confirms that heel elevation produces immediate, measurable improvements in squat depth and mechanics.
16mm vs 20mm vs 22mm: The Differences
| Heel Height | Ankle Demand Reduction | Torso Uprightness | Best For |
|---|---|---|---|
| 16mm (¾") | Moderate | Moderate improvement | Good ankle mobility, powerlifting-style squat |
| 20mm (⅞") | Significant | Significant improvement | Most lifters. Best all-round heel height |
| 22mm (~1") | Maximum | Maximum improvement | Olympic weightlifting, significant ankle restriction |
20mm is the most popular heel height for UK and European powerlifters and the standard for most weightlifting shoes. The right choice for the majority of lifters.
22mm provides maximum ankle dorsiflexion compensation. Standard for Olympic weightlifting. The Castiron Lift IronLifter 3 uses a 22mm heel.
16mm suits lifters with good ankle mobility who want minimal heel elevation or a more grounded feel.
Which Heel Height Is Right for You?
Choose 20mm if: you are a powerlifter or general strength athlete, have moderate ankle mobility restriction, want the most versatile squat shoe, or are buying your first weightlifting shoe.
Choose 22mm if: you are an Olympic weightlifter, have significant ankle mobility restriction that 20mm has not resolved, or prefer a very upright torso position.
Choose 16mm if: you have good ankle mobility, prefer minimal heel elevation, or are transitioning gradually from flat shoes.
The Castiron Lift Range
| Model | Heel Height | Best For |
|---|---|---|
| IronLifter 1 | 20mm | Best all-round squat shoe. Unisex |
| IronLifter 2 Women's | 20mm | Women's-specific fit |
| IronLifter 3 | 22mm | Olympic weightlifting, significant ankle restriction |
| PowerLifter 3 | 20mm | Competition-grade. Serious competitors |
🏋️ Find Your Heel Height
— IronLifter 1 — 20mm, unisex, best all-round
— IronLifter 2 Women's — 20mm, women's fit
— IronLifter 3 — 22mm, Olympic lifting
— PowerLifter 3 — 20mm, competition-grade
Fast shipping across the UK and Europe. 🇬🇧 🇩🇪 🇫🇷
FAQ
Is a higher heel always better?
No — a higher heel suits lifters with limited ankle mobility or Olympic-style squatters. Lifters with good ankle mobility may prefer a lower heel.
Are weightlifting shoes legal in British Powerlifting competition?
Yes — weightlifting shoes are legal in all British Powerlifting and EPF categories with no restrictions on heel height.
Should I buy a 20mm or 22mm shoe?
Start with 20mm. The IronLifter 1 is the right choice for most UK and European lifters. Move to 22mm only if you are an Olympic weightlifter or have significant ankle restrictions that 20mm does not resolve.
Can I squat in flat shoes?
Yes — flat shoes suit deadlifts and lifters with excellent ankle mobility. For most UK and European lifters, a raised heel improves squat depth and mechanics immediately.
Final Thoughts
For most UK and European lifters, the IronLifter 1 (20mm) is the right choice. Olympic weightlifters and those with significant ankle restrictions should consider the IronLifter 3 (22mm). Choose based on your squat style, anatomy, and goals.
Read next: How to Squat Deeper 2026 | Best Weightlifting Accessories 2026 | Ankle Mobility for Squats 2026
Train with intention. Lift with the right gear. Own the platform.