Due to a knee injury that kept me off the TT bike for a good two years, I'm looking at doing my first ITT in three years. There are certain consumables I need to replace, and I would like to get suggestions for both pulley wheels and tires.
For the pulley, I'm currently running 6870 Ultegra Di2 derailleur. The derailleur has maybe 50 hours of use, but there's a part of me that is concerned about the pulley wheels that come on the derailleur, as a previous 6770 derailleur (bought used) had pulleys that deteriorated to the point of being very draggy over a period of two years (although it could have happened sooner, don't know b/c I didn't bother to check until quite a bit later). I don't need a fancy a set of fancy Cceramic Speed pulleys, but was wondering if there are any other suggestions. Otherwise i'll be buying the Dura Ace 9000 pulleys.
Also, I have tires from three years ago, the original Vittoria Corsa Speed tires. All in all, I probably have three short TT races (10 milers each) and maybe another 500 miles of training on them. Any ideas as to when I should swap them? Don't want to be pissing away crr watts (due to aging and usage of the tire). Also, I presume that I could just keep on using the 1st Gens, as these are quite fast (and cheap to boot)? I guess I could also spring for GP 5000s, but those don't come in a 23 mm width. I'd estimate that I may be racking up ~350 TT racing miles this year, and maybe a few more just noodling around town.
Thanks in advance
For the pulley, I'm currently running 6870 Ultegra Di2 derailleur. The derailleur has maybe 50 hours of use, but there's a part of me that is concerned about the pulley wheels that come on the derailleur, as a previous 6770 derailleur (bought used) had pulleys that deteriorated to the point of being very draggy over a period of two years (although it could have happened sooner, don't know b/c I didn't bother to check until quite a bit later). I don't need a fancy a set of fancy Cceramic Speed pulleys, but was wondering if there are any other suggestions. Otherwise i'll be buying the Dura Ace 9000 pulleys.
Also, I have tires from three years ago, the original Vittoria Corsa Speed tires. All in all, I probably have three short TT races (10 milers each) and maybe another 500 miles of training on them. Any ideas as to when I should swap them? Don't want to be pissing away crr watts (due to aging and usage of the tire). Also, I presume that I could just keep on using the 1st Gens, as these are quite fast (and cheap to boot)? I guess I could also spring for GP 5000s, but those don't come in a 23 mm width. I'd estimate that I may be racking up ~350 TT racing miles this year, and maybe a few more just noodling around town.
Thanks in advance