How Converse Evolved the Chuck 70 Tongue: Design Changes and Ongoing Fixes
By Sophia Al-Mansoor
Proper sizing remains the most decisive variable dictating whether a Chuck 70 low tongue stays centered. Standard industry consensus and official brand guidance suggest going down a half size (0.5 US) from your normal athletic shoe size. Chuck 70s run notoriously long in the toe box.
If a wearer selects their typical true-to-size measurement, two interconnected issues manifest:
- Vamp Slack: The excess length forces the eyelet rows to sit too far forward on the foot, positioning the widest part of the lacing system over an area with inadequate instep volume. The laces cannot bite down securely onto the top portion of the tongue.
- Heel Slippage: As the heel lifts off the OrthoLite footbed with each stride, the foot slides forward inside the shoe. This micro-piston movement pulls downward on the eyelets, shearing the tongue laterally with every step.
Lacing tension must be distributed evenly down through the bottom eyelets rather than concentrated solely at the knot. When the lower eyelets are pulled taut, the internal reinforcement stitch hugs the sides of the midfoot snugly, centering the entire tongue assembly.
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