You must be unlucky. The wife’s bike (Giant Excape hybrid) has 23 (front) and 25 (rear) GP4000s II with no punctures since I put them on. The front is really past the point where i should change it, but Sat & Sun took it up a steep climb (1.25km/145m) to a TV tower - the road is only open for access as there is a shrine further up - but despite the bad surface (falling apart) and debris everywhere - kept losing traction on the rear wheel - no trouble. Biggest problem was the brakes on the way down - walked it at one point. Tightened them up before i tried it yesterday.