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A true 23mm tyre with adequate puncture protection. Light, fast-ish and in 1000miles no flats. The rubber is cut and scarred in places showing that it has dealt with a normal amount of road debris, absorbed it, but still kept the tube intact and protected. I was so impressed I bought another set as direct replacements for when the originals eventually wear out. I even used them on the turbo trainer and they stood up well enough to the heat and friction with the only issue being making sure that the roller is tight enough against the tyre to prevent slipping/spinning as this causes the contact patch to overheat and start shedding rubber. At the price offered by Merlin I recommend the Durano S as a good all-round tyre.
Excellent tyres. Fast, durable and reasonably light. I would highly recommend.