Originally Posted by
DubT
Just for the sake of curiosity what bolts are you replacing and how much weight are you going to save? $70 does not buy very many Ti bolts.
Also what chain weight did you use in your calculations? When I converted from chain drive to the Gates belt the total weight reduction was 232 grams. I was using an 8 speed timing chain that weighed 426 grams, the new Gates belt weighed 108 grams.
I replaced the bolt and nut of the front derailler mount, headset top cap bolt, and water bottle bolts (only 3 mounts on my frame) with alloy. Both stems (6 bolts each) and both seatposts (4 bolts) with Ti. The Dura-ace derailleurs and Planet-X brakes already use Ti bolts. I got some slim seatpost collars with Ti bolts and I used alloy bolts and nuts for all the chainrings.
I weighed a 9spd KMC non-SL chain cut to fit 40t rings but if I were to use a chain it would be a KMC X9SL with 34t rings on compact spiders so I figured all that into my rough "calculations". The end result is Gates is lighter but not as light as it could be and there's times when the large rings are a hassle.