Surly  ExtraTerrestrial Tire - 27.5

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Color: Black/Slate
Size: 27.5 IN x 2.5 IN
Shipping restrictions apply.

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Members get an estimated $7.80 (10%) back on this item.
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Ultra-durable and designed for low rolling resistance, the Surly ExtraTerrestrial 27.5 in. tire is meant for heavy off-road touring and shines on hard-packed terrain and multiroad surfaces.


  • Low-profile, directional tread pattern maintains traction when you need it
  • Molded tread pattern and a nylon breaker in the sidewalls helps protect against cuts
  • Kevlar® cap under the tread helps protect against flats
  • Recommended rim width is 23–30 mm
  • Surly recommends checking with your rim manufacturer to verify rim and tire compatibility before assembly or use
  • Note: Tire images shown may not reflect size/color/material options available on this page


View all Surly Road Bike Tires

Technical Specs

Item #219157
Best Use

Bike Touring


Wheel Size

27.5 inches

Tire Width

2.5 inches

Bead Type




Thread Count Casing (tpi)

60 threads per inch

Tread Type

Knobby Tread

Recommended Pressure (psi)

35 pounds per square inch


1010 grams

Tire Type

Tubeless Ready

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