Stable and high quality - point deduction for bore diameters

Once only I had problems with the so-called. Tubeless wheels of hand truck and the conversion to a wheel with hose was unsuccessful (tube after coating the jacket always leak), I wanted to switch to a alternative spare. The description (matched so far everything on the dimensions of her) and also the reviews convinced me so that this bike was purchased. Delivered was prompt and the quality is right. What I had not occurred was that the bore diameter of the hub 'only' 20 mm was actually and not, as assumed 'for 20mm hub'. Now I understand why many vendors specify the bore diameter with comparable products with 21 mm. Conclusion: get the wheel just using brute force to the hub - it was indeed only by 1 mm. I hope I have not damaged the bearings and tires and now holds what it promises (puncture resistance). Otherwise, I have a problem, because I certainly can not disengage from the hub wheel.