Footwear & ground•Practice-based
Outsole lug
Also searched as: lugs, traction lug
Outsole lugs are raised tread shapes on the bottom of a shoe that help with traction on trail, mud, gravel, or loose surfaces.
ground card2 claim notesupdated 2026-06-25
WBC translation
WBC treats lugs as terrain tools: useful when surface demands justify them, unnecessary when they add bulk or awkwardness for everyday use.
Why it matters
- 1Helps readers choose trail shoes by terrain rather than aesthetics.
- 2Explains why a minimal road shoe can feel wrong on mud or loose gravel.
- 3Pairs with stack height and ground feel as a tradeoff.
Do not overclaim
- Lugs improve grip only in the context they are designed for; they do not make footing foolproof.
- Aggressive traction can reduce ground feel or feel clumsy on pavement.
Evidence note
This is primarily a product-spec and use-case term; evidence is less relevant than terrain, material, pattern, durability, and fit.