Well I've been collecting bike, e-bike and dirt bike wheels for a while and after having so many problems with the last part I finally broke down and ordered these spoons with lower tires Profile. and boy let me tell you it matters WORLD. Never thought it could be so easy! They slide without scratching the rim as they are so flat and I haven't pinched the tube with them yet. A+! 10/10! Would recommend them to anyone doing wheel fitting or tire changes especially on dirt bike wheels.