I was just curious if a Shimano 10 speed 105 triple chainset would be compatible with the Shimano 9 speed stuff on my Secteur. I was just thinking of possibly changing my Shimano FC-R453 triple chainset that I am guessing is pretty heavy as is the BB-ES25 bottom bracket that I have fitted. I know that this is not going to make it any faster (I am not a great cyclist anyway) but I like changing things. If they do not work it is fine I will just leave it as I have no intention of paying out for a new groupset as the Tiagra stuff works great. Thanks for any help.