I put a Marathon Plus on my bike rear tire just prior to starting a 17-day Vancouver to Calgary adventure on the Trans Canada Great Trail.
And felt very confident.
However … it punctured day 17 on a paved highway. Only 30km from Calgary.
Rather than using a breaker strip of Kevlar under the tread, the Marathon Plus has a thick layer of springy SmartGuard rubber. Because of this, any embedded objects tend to get forced outwards rather than being pushed in, and it takes something special – a police stinger, maybe? – to cause a puncture. …
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