I ride a 2015 Kona Sutra, and I currently have bar end shifters. Is it possible to swap the bar end shifters to STI shifters since I have a MTB crank? as I am thinking about swapping to a carbon Handlebar and Stem

Crank: Shimano Deore Crank 48-36-22
F/D: SRAM X5
R/D: Shimano Deore SGS
Cassette: 11-34 (9 speed)

I'm guessing that you want to use STIs from a road group, if so you may need to change the FD also. I don't know the compatibility of the SRAM FD.

Brad

You may also have an issue with the brakes. I believe the Sutra comes with cantilever brakes. Make sure the STI will work with them.

No, it comes with disc

Have you looked into Gevenalle levers/shifters?

Gevenalle Cyclocross - Gevenalle

azza, yours is a mtn crankset and likes to be paired with mtn or bar end shifters and mtn FD which is designed for shifting on 47-50mm mtn chainlines. STIs won't work well with mtn FDs, so you need to use a road FD which are designed for shifting narrower road chainlines ~45mm. You can swap one of the 2.5mm plastic BB spacers from the DS to NDS to reduce the chainline from 50mm to 47.5mm and try using a 9s road triple FD with your STIs. It may work, but I think shifting to the large chainring would not be good. A trekking crankset which uses a square taper BB would be easier to match with road FD and STIs because you can use a BB with correct spindle length to bring the chainline all the way in to ~45mm. With your Hollowtech mtn crankset you can only reduce it to 47.5mm. Also, STIs will work with some models of 9s mtn RDs but not others, so you may have that to ponder as well.

azza, I came across the following article written by a local manufacturer. It is relevant to your bike and even though the R&E folks pride themselves for being unconventional, they really know their stuff.9sp and 10sp

You need to switch to a Shimano road triple front derailleur - look for one that is rated 50T max.

You may or may not have to move your chain line, you can determine that after getting the front derailleur.