Shimano 105 FC 5703  30-39-50 tooth 172.5mm arm length

I have a good mix of Ultegra and Dura-ace group on my bike. That does not mean that I can’t dip a little lower in the Shimano line and run some 105. The price difference from 105 to Ultegra is $100 easy, for just this one part. That does buy a better set of chainrings, but those are what I’ll have to replace anyway and 105 is just fine. Very good for this purpose because the 105 has a 50 tooth big ring and the Ultegra triple has a 52. I know it’s not much of a difference but it means I’ll be in the big ring a little more often which means I’ll be in the middle ring a little less often. I’m doing the math in my head and it equals a more evenly utilized (worn) drivetrain vs. the more expensive crankset.

Maybe that doesn’t matter but I still saved $100 easy.

Made in Japan