Always wanting to improve their tires, WTB has just announced a new casing for their gravel tires measuring at least 37mm wide. This casing is dubbed SG2, and is an ultra-thin nylon insert that coveres the tire from bead to bead under a 120 tpi casing. This means the 120 tpi casing will ride like a lightweight tire but will offer complete protection against snake bites and other potential damage. These SG2 gravel tires only come in black sidewalls and will see a 5-10% weight gain over their 60tpi counterparts without puncture protection. This translates to a 15-50 gram increase…
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