I purchased this stem in 110mm length to replace a 120mm stem from a different brand because I was starting to have some soreness on my shoulders during rides that are longer than 2 hours. Subjectively, the EA90 seemed stiffer & lighter that the old stem (probably because of the shorter length), but the integrated Garmin computer mount (which attaches to the faceplate) made my handlebar sleeker/less cluttered.
Overall, it's an expensive handlebar. Great.
Pros: Better vibration damping than my old aluminium cheapo handlebar, which was surprising. Cable routing is nice. Clean aerofoil section is nice. It's clean, stiff, and light; what's not to like?
Cons: Installation was a PITA. Overall, the internal cable routing seems alright, but there were multiple sharp edges on the *inside* of this part that kept binding my cables. These internal edges scuffed the full length of my cables, which is annoying. The binding cables also made drop installation and fitting even after the cable installation a pain. If you're making your LBS deal with this bar, no sweat, but they'll probably tack on at least an extra hour of labor just on principle, if not two.
Installation tips: First, if you're doing this yourself, you _absolutely_ _must_ get one of those cable routing kits. Honestly I'm surprised I didn't break my routing bits at multiple points, with some of the geometry required (you gotta use a lot of force to turn some of the corners). Second, and I can't stress this enough.. install the larger cables first. When I did my install, the geometry was flat-out impossible to get the large cables back out if the small ones went in first. The smaller (4mm) cables are more flexible, and being smaller allow better geometry to boot.
I purchased a new Niner RLT9 that came stock with an Easton Cinch carbon crankset, and a 47/32 chainring. Most of my gravel rides have some really steep sections and I was finding that the 32 front 34 rear just wasn't enough. Thankfully Easton makes a range of chainrings so I purchased this 46/30 gravel chainring. This gave me just the extra oomph I needed. Very happy. I also swapped out the stock spindle with an Easton power meter spindle that I'll review in another post.
I had built up a disc brake road/gravel bike from an allow frame that I thought should have fit my wife. It ended up not being a great fit for her primarily because of her discomfort with road geometry and drop bars. She now has a nice Detroit bikes comfort cruiser that she loves. So, that left me with a bike that I had hand spec'd and built myself. I don't want to sell it. I decided maybe I could outfit this bike to fit me and that's where the Easton stem comes in. I first tried the EA50 in 100mm +/-17 degrees, which was not quite long enough. So, I came right back Bike Tires Direct for the Easton EA70 Stem +/- 7 Degrees - 120mm and it is perfect. Good price. Solid construction. Nothing too fancy.