I recently had a great deal of trouble getting the tyre back on my vuelta wheels .....i mean a lot of trouble!! so much so that my plastic tyre levers got so much stick that they heated up and became bendy and unusable. I went out the next day to buy some more and the LBS recommended some metal ones, which i duly bought. Im just worried that these will wreck the wheel rims next time im trying to lever the tyre into place......will this be the case...? It wouldnt be so bad but the bike isnt even mine its a mates that im loaning errrrrmmmm long term until he remembers i have it.