I recently bought a sram chain set from chain reaction to go on my Cannondale caddx.i had this fitted at Edinburgh cycles the chain set has only done about 250miles . I changed from big ring to smaller ring . On ping this the chain came off . On closer inspection i noticed all but on of the bolts had came out. On speaking to the warranty department at chain reaction I was told this was down to bad maintenance not a faulty chain set . Any adiadv welcome