It all voids the warranty and they're not designed for loads bar ends place on them anyway. I wouldn't do it. On the stem creak, you shouldn't need to grease it but remove the faceplate and inspect all the parts including the bar. Reassembly per Thomsons instructions and make sure you lube the threads. When using CF bars it's reeeeeaaaalllly important to make sure that there are no sharp edges on the stem contacting the bar.Scottay5150 said:
I've broken two CF bars, one a USE and the other a Easton Monkeylite riser. Both times it put me on the ground. If I had any desire to use a CF bar today, I probably go with the Easton DH model: still relatively light, but much more robust. As it is, I run a Salsa CroMoto riser. You just can't have enough chromed steel on an MTB.