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Single vs. Two-Hole Deflector Holes: What's the Difference?

May 9, 2021

When looking at Sentry Tire solid tires, you’ll notice that there are two options when it comes to deflector holes (AKA aperture holes). Often, we get the question of why there are tires with one hole and why there are tires with two holes on the tire’s sidewall.


A common misconception is that a single-row tire has a deeper wearable tread. That is simply not true. If you take a precise measurement of the tread depth (at least on Sentry’s tires), you will find that the tread depth is the same (within tolerance). Visually, though, it may look like the tread depth is shallower on a double row deflector tire. However, the single-row deflector tire allows the user to wear slightly past the wearable tread, whereas for the double row, you can only wear up to the first row of deflector holes. We do not recommend this and, for driver and equipment safety, change out your tires before the wear-out points.

Nonetheless, comparatively speaking, a two-row deflector tire has a more stable quality since the heat can better cure the “mid” section of the tire than a single-row. During operations, the two rows have better heat-releasing characteristics than single-row.

Operational Comfort and Cushioning

What really sets apart the two tires is that if you have a 2-row aperture tire, it generates more cushion, reducing driver fatigue and injuries. Another significant advantage of a double-row tire is its lighter weight, so it’s easier on the equipment and provides more efficient fuel usage.

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