On my old tarmac my chain snapped 4 times, it was a sram 1031 chain all different links, i always replaced them correctly with my chain tool and with different links snapping (i always mark the ones ive re joined so i know) i dont think its me putting them together wrong, im 15 stone and climb in a very aggressive style out of the saddle i also sprint alot, ive now got a boardman with a sram 1051 chain and this has snapped twice now, it always seems to happen going up hill,
i asked in a small bike shop yesyerday if he has a chain tool i could buy and he kicked off saying i was an idiot and my bike is either broken or im "an idiot" he then walked me to the end of the shop and pointed at a photo of the pro peloton and said "their chains dont snap and they put out LOADS more power than you ever could your just a pathetic flea compared to them" ...low fell cycles gateshead .... Avoid the old git... Worst encounter ive ever had all i asked for was a tool! ....anyway any suggestions as to why this may be?
Both chains were less than a month old the boardman is probably over a month now, they are lubed and cleaned atleast weekly