Sole Source: Sneaker Science and Sizing Guide | JD Sports

Welcome to JD Sport's Sole Source, the technical archive and definitive footwear intelligence hub from JD Sports. Designed for sneaker connoisseurs, athletes, and parents navigating back-to-school and holiday shopping, Sole Source decodes the material science, biomechanical engineering, and cultural legacy behind every iconic silhouette in our catalog. Whether you are dialing in the exact fit for basketball shoes, evaluating growing-foot support and durability for playground wear, selecting technical gear for trail running and performance running, or upgrading your everyday athleisure rotation, our deep dives bridge the gap between high-level athletic utility and streetwear history. From midsole foam chemistry and archival preservation standards to fit ergonomics and terrain-specific traction, explore our curated categories below to find the right pairs for your family and master the mechanics, technology, and story behind every step.

• Jordan 1 Low vs. Mid vs. High: Which Air Jordan 1 Should You Buy in 2026?
• Air Jordan 4 History: From "The Shot" to Today's Top Releases
• Air Jordan 4 Wings Explained: Floating Eyestays, Lacing & AJ4 Fit
• Air Jordan 4 "Frozen Moments": Materials, Fit, and Should You Buy It?
• Air Jordan Eclipse Plate Explained: How It Works & Which Shoes to Buy
• Tinker Hatfield & Air Jordan: Iconic Designs & Which Pair to Buy Today
• What Is the Jordan Spizike? Spizike vs. Jordan 3 vs. Jordan 4 (2026)
• Jordan 1 'Shattered Backboard': Leather Durability & Care Guide
• Are Jordan 1s Good for Everyday Wear? AJ1 vs. Dunks & Air Force 1s
• Jordan 1 Sizing: Do AJ1s Run True to Size? Wide Feet & Narrow Toe Tips
• How to Break In Jordan 9s: Tips for the AJ9 University Blue
• How to Style the Air Jordan 7 PSG: Football-Inspired Outfit Ideas and Fit Guide
• How to Wear the Jordan 6 'Electric Green': Outfit Ideas, Fit, and Sizing Tips
• Jordan 6 Electric Green: How the Glow Sole Works, Care Tips & Sizing
• Jordan 4 Leather vs. Suede: Which Air Jordan 4 Material Should You Buy?
• Jordan 4 Sizing: Do Air Jordan 4s Run True to Size? How to Fix the Pinky Pinch
• Air Jordan 1 Retro High OG: History, Fit, and Which Pair to Buy
• Jordan 3 Sizing: Do AJ3s Run True to Size? Achilles Bite & Pinky Pinch Fix
• Air Jordan 14 Black/White: Sizing, Features, and Is It Worth Buying?
• Jordan 13 Flint: Reflective Details, Sizing, and Is It Worth Buying?
• Jordan 11 Low IE: Differences, Fit, and Why It's a Great Summer Sneaker
• Jordan 11 Low vs. High: Which Jordan 11 Should You Buy in 2026?
• Jordan 11 Gratitude vs. Concord: Which Black and White AJ11 to Buy?

• What Is Treadlite by UGG? Outsole Explained, Sizing, & Buying Guide
• Why UGG Boots Keep You Warm: Sheepskin, Sizing, and Which UGG to Buy
• Dr. Martens 1460 vs. 1461: Which One Should You Buy? Fit, Break-In, and Sizing
• Dr. Martens AirWair Soles Explained: Comfort, Break-In & Sizing Tips
• Birkenstock Boston vs. Arizona: 2026 Comparison, Sizing, & Comfort
• Birkenstock Footbed Explained: Cork Support, Break-In, and Sizing Guide
• 2002 Crocs Beach Clog: Crocs History, Fit, and Classic vs. Echo
• Are Crocs Good for Your Feet? Crocs Comfort, Recovery, and Sizing Explained
• How to Style Jordan 9 'University Blue': Outfits for Everyday & Techwear

• New Balance 9060 Sizing: Does the 9060 Fit True to Size?
• How to Lace Nike Dunks: 5 Styles Plus Fixes for Heel Slip & Tight Toes
• Best New Balance 2002R Alternatives Under $110 (2026)
• On Cloud 5 Sizing: Do Cloud 5s Run True to Size? (Plus Cloud 6)
• How to Spot Fake Nike Dunks: Real vs. Fake Checklist & Buying Guide
• New Balance 550 Sizing: Do 550s Run True to Size? (2026 Fit Guide)
• Best Kids' Sneakers for Back to School 2026: Top 10 Picks Rated for Durability
• How to Clean Nike Dunks Without Creasing: Care & Prevention Guide
• Adidas Samba vs. Gazelle vs. Spezial: Which One Should You Buy in 2026?
• Best Running Shoes for Flat Feet in 2026: Top Stability Picks by Need and Budget
• How to Style the New Balance 9060: 5 Easy Outfit Ideas for 2026
• Are Nike Dunks Good for Wide Feet? Dunk Sizing vs. Air Force 1 and Jordan 1
• Nike AL8 Review and Sizing Guide: Does the Nike AL8 Run True to Size?
• What Do DS, VNDS, and NIB Mean? Sneaker Condition Terms Explained
• How to Organize a Sneaker Collection: The Best Way to Store 100+ Pairs

• Is the New Balance 1906R Good for Running? Honest Answer + Better Running Picks
• HOKA Clifton 9 vs. Bondi 8: Which Max-Cushion HOKA Should You Buy?
• The Evolution of Nike Air: From Tailwind to Air Max Dn, and Which Air Max to Buy
• Nike P-6000 vs. Vomero 5: Which Retro Runner Should You Buy in 2026?
• ASICS GEL-1130 vs. On Cloudnova: Best for Long Shifts & Standing?
• adidas Nite Jogger: History From 1980 to Ninja, Fit, and Is It Worth Buying?
• Is the New Balance 740 a Stability Shoe? 740 Support vs. True Stability Runners
• New Balance 740 Review: Y2K Runner Design, Fit & NB Comparisons
• Nike Free 3.0 vs. 5.0: What's the Difference and Which One Should You Buy?
• How Nike Free Works: Flexible Grooves, Natural Motion, and Which Free to Buy
• ASICS GEL-Kayano vs. GEL-Nimbus: Stability vs. Cushioning Comparison
• What Is ASICS GEL? How GEL Cushioning Works and Which ASICS GEL Shoe to Buy
• HOKA Stack Heights Explained: Cushion Levels & Which HOKA to Buy
• What Is HOKA Meta-Rocker? How the Rocker Sole Works, Plus Which HOKA to Buy
• On Running History: From Garden Hose to Helion™, Plus Which On Shoe to Buy
• How On Cloud Shoes Work: CloudTec® Explained, Plus Which On to Buy
• New Balance 990v6 Arch Support: Is It Good for Flat Feet, and Who Should Buy It?
• What Is New Balance ENCAP? How It Supports Flat Feet and Overpronation

• Nike AL8 vs. Nike V2K Run: Which Retro Runner Should You Buy in 2026?
• Why Is the New Balance 9060 So Popular? 2026's Biggest Sneaker Trend Explained
• Does JD Sports Have Exclusive Nike Colorways? How Exclusives Work
• Is the New Balance 530 Still Worth It in 2026? Our 12-Month Review
• New Balance 2002R vs 1906R (vs 9060): Which One Should You Buy in 2026?
• EVA vs. PU Midsoles: Which Sneaker Foam Is Right and Lasts Longest?
• Best Lightweight Summer Sneakers: Which Midsole Foam Is Right for You?
• Is the New Balance 574 Good for Wide Feet? 574 Sizing and Fit Guide
• New Balance 574 History: Trail Origins, Street Style, and Which 574 to Buy
• Best New Balance Shoes for Wide Feet: SL-2 Last, Top Models & Widths
• Is the New Balance 574 Comfortable? Cushioning & 574 vs 530 vs 9060
• Yeezy 350 V2 Sizing: Do 350s Run Small? Fit vs. Nike & adidas Knits
• Yeezy Boost Explained: Comfort, Sizing, and What to Know Before Buying
• Mars Blackmon & Air Jordan: How Spike Lee Helped Save the Brand
• Jordan Spizike Low vs. High: Which Should You Buy, and How Do They Fit?

• Nike Metcon vs. adidas Dropset: Which Is the Best Lifting and Gym Shoe in 2026?