I can't tell exactly what model Stronglight that is (49D?), but if you plan on keeping it make sure you use the correct puller - otherwise you'll end up with a ruined crank thread, which happened to the model 93 on my girlfriend's PX-10, courtesy of a mechanic who decided to use a TA puller instead of a Stronglight one. A TA puller is NOT the correct one, even if they do seem like they thread in okay. From memory, the TA puller is 23.15mm and the Stronglight one is 23.35mm. I may be wrong on these sizes, but like I said, a TA puller can ruin a crank, and I know for a fact that I'm not the only one who has had this happen to them. Good luck!....