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Should you slash your tires?

Last updated: September 2012

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The practice of siping, or cutting extra slits into tire treads, is supposed to improve a tire’s snow and ice-biting ability. Tire dealerships typically charge around $15 or more to sipe tires.

To see whether siping makes any difference, we tested two performance all-season models, an H-rated Michelin Energy MXV4 Plus and a V-rated Michelin Pilot Exalto A/S, with and without siping.

The siped version of both models showed modest but measurable improvements in snow-traction and ice-braking performance. But braking distances on wet and dry pavement were a few feet longer. Besides costing $60 or so for a set of four, having your tires siped potentially voids any tread-wear warranty. We don’t think the modest gains are worth the extra costs.

   

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