True-to-Size Millimeter Sizing Comparison
Salomon Speedcross 6 vs Salomon Speedcross 6 GTX
Detailed size conversion chart, cavity measurements in millimeters, and crowd-sourced fit advice for choosing your perfect size.
Interactive Size Converter
Select what size you wear in the Speedcross 6 to see your calculated size in the Speedcross 6 GTX.
Complete Size Conversion Matrix
Direct millimeter-calibrated mapping comparing all available sizes between both shoes.
| Speedcross 6 (US) | Internal Cavity | Speedcross 6 GTX Equivalent | Match Accuracy | Fit Difference |
|---|---|---|---|---|
| US 7 | 263 mm | US 7 | 100% | 0.0 mm |
| US 7.5 | 266 mm | US 7.5 | 100% | 0.0 mm |
| US 8 | 269 mm | US 8 | 100% | 0.0 mm |
| US 8.5 | 273 mm | US 8.5 | 100% | 0.0 mm |
| US 9 | 276 mm | US 9 | 100% | 0.0 mm |
| US 9.5 | 279 mm | US 9.5 | 100% | 0.0 mm |
| US 10 | 283 mm | US 10 | 100% | 0.0 mm |
| US 10.5 | 286 mm | US 10.5 | 100% | 0.0 mm |
| US 11 | 289 mm | US 11 | 100% | 0.0 mm |
| US 11.5 | 293 mm | US 11.5 | 100% | 0.0 mm |
| US 12 | 296 mm | US 12 | 100% | 0.0 mm |
| US 12.5 | 299 mm | US 12.5 | 100% | 0.0 mm |
| US 13 | 303 mm | US 13 | 100% | 0.0 mm |
| US 14 | 309 mm | US 14 | 100% | 0.0 mm |
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Frequently Asked Questions
How does the Speedcross 6 size compare to the Speedcross 6 GTX?
Both shoes share a very similar length profile. We recommend ordering your standard size in both. The Speedcross 6 has an internal fit offset of -4mm compared to -4mm for the Speedcross 6 GTX.
Do these shoes fit wide feet comfortably?
The Speedcross 6 has a standard medium width profile, while the Speedcross 6 GTX is standard medium.