MSW Tour Guide Tire - 26 x 1.75 Black Folding Wire Bead Puncture Protection Reflective Sidewall 33tpi. If you load your bike with heavy cargo or need an extra bit of traction for an extended haul the Tour Guide Tire is your beast of burden! Its shoulder-to-shoulder sipes combined with a thick tread cap and puncture protection equip this tire with reliability for conditions most cyclists would not attempt to conquer.