The last thing you need out on that long back roads tour is a flat. The Surly ExtraTerrestrial tires are perfect for hard-pack offroad surfaces, offer puncture protection and anti-cut propagation features, making it a tire that is ready to tour on any terrain. It also uses a low unidirectional tread pattern to ensure efficiency and low rolling resistance. It's made to be durable, versatile and is right at home on tour or on the trail.
Nylon breaker in the sidewalls for cut protection
Molded pattern for anti-cut propagation
Aramid cap under the tread to protect against flats
File tread between tread blocks for more flat protection
Completed my first mixed terrain tour on these in Northern California. Great on road and gravel. Deep mud and larger rocks less good, but wasn't expecting them to be as good as nobbies anyways. No flats - I feel great on them. Max psi 60, but I'm running them at 40.
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