As part of some upgrades from Ultegra 8050 / 8070 to Dura Ace 9150 / 9170, I’ll be trying out a 52-34 (typically you would use 52-36 subcompact or 50-34 compact) gearing. I replaced the 50t chainring on my Shimano 105 R7000 160mm crankset, with a lighter 52t Ultegra one.
This setup is not officially recommended due to loss in potential shifting quality, but I’ve read enough to feel it won’t be an issue, especially with DI2. The benefits of doing this is I’ll gain higher top-end speed with the 52t, most useful on descents, while still retaining the same climbing capabilities with the 34t. I decided to swap out my 11-34 cassette with a 11-28 as I mainly ride on flats now and the condensed gearing will allow to me to have smaller jumps between cogs. I’ll be able to switch back to an 11-34 when necessary, for specific events with a lot of climbing.
I’ve adjusted my DI2 synchro shift accordingly, and will be using 15 gears.
I Spit Hot Fire 