Shimano Compact 50/36?

mikael17128 said:

Just checking over the Trek website and it looks like the Madone SL 5.9 has options for either a Shimano Dura-Ace 53/39 or 50/36.

Anyone know anything about this?

Mike W.

the original dura-ace 7800 series is only available in 53/42, 52/39, 53/39, 50/39, 54/42, 55/42, 56/44. but because the max. difference for the FD is 15 teeth it should work. if it's 50/36, the 36 tooth sprocket is not a dura-ace 7800 series part. maybe a typing error on the website?

The bike specs specify a Dura-Ace 53/39 but does not specifically specify a Dura-Ace 50/36. It only gives you an option to get 50/36 gearing. My guess is that you can get a Bontrager Race X Lite Carbon 50/36 as an option.

bontrager.comdetail.aspOpen ↗

ender Wiggins said:

The bike specs specify a Dura-Ace 53/39 but does not specifically specify a Dura-Ace 50/36. It only gives you an option to get 50/36 gearing. My guess is that you can get a Bontrager Race X Lite Carbon 50/36 as an option.

bontrager.comdetail.aspOpen ↗

Yeah..............

fixit said:

the original dura-ace 7800 series is only available in 53/42, 52/39, 53/39, 50/39, 54/42, 55/42, 56/44. but because the max. difference for the FD is 15 teeth it should work. if it's 50/36, the 36 tooth sprocket is not a dura-ace 7800 series part. maybe a typing error on the website?

the shimano stated capacity for the fd is 15 teeth, both 7700 and 7800 models. but like some of their other specs, it can be exceeded. I shift 16 teeth (50/34) on my fsa crankset with a da 7700 series fd. works fine.