Its really hard, if not impossible to shift up to the large (52T) chainring on my bike of late. I thought this might be the cables, so I replaced these. The cables run freely but the gear change is just as bad. My next thought was the front mech its self. It appears to be in good condition however the recoil spring (or whatever its called) although clean may be a little taught. My next step is to soak the mech in degreaser and relube. Has anybody any more ideas? btw Its a Shimano road mech (Tripple) with rapid fire shifters.