Hi 2 questions regarding my new wheels..


First is about damaging my new rim by using force to get the tyre off?? I know carbon is strong but just a bit interested to know the best way about getting this new tyre off, using levers seems a little scary to say the least.... Is there a good way to go about this??

Another question is im using valve extenders as my front rim is about 40mm and my rear is 88mm... I am using about 40mm valve extenders on both wheels.... the front is causing real problems, it just screws the actual valve off when I try to screw the extender off..

Any help??