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Tread width is how wide the wheel's contact surface is, measured across the tread face. A wider tread spreads load over more contact area, which generally increases capacity and can improve floor protection.
Tread width is a separate spec from wheel diameter — two wheels of the same diameter can have very different treads, and tread face shape (flat, crowned, or V-groove) affects contact pattern too.
Sizing for capacity, and matching wheel width to the equipment’s yoke — a mismatched tread width can bind in the yoke or leave it loose.
Assuming diameter alone determines capacity. Tread width contributes independently — check both specs, not just diameter, when comparing wheel options.
Does wider tread always mean higher capacity?
Generally yes, since it spreads load over more contact area, but material and bearing type matter too.
What is tread face shape?
The profile of the tread's contact surface — flat, slightly crowned, full crown, or V-groove — which affects contact pattern and is a separate spec from tread width.
