Hand position on hoods

That’s kinda a million subjective questions but I can say … I think your bars are tilted up (at the front) a little. Tilt them down, reposition the lever clamp further up the bar and try that.

I only have 105 Di2, so I’m guessing that means I have an identical or very similar lever and hood shape, but no secondary buttons.

I also find slightly rolled back bars with slightly angled up levers to be the most comfortable position (I fiddled with different setups quite a bit).

As an experiment I just tried to reach the hypothetical buttons on my hoods with my thumbs and found I could do so pretty comfortably. This is despite having relatively small hands.

Unlike other commenters so far, I’m going to suggest rolling your levers inwards (but keeping everything else the same). This is almost the norm now in pro ranks, and it works for me for two reasons.

Firstly I just find it more comfortable when resting my hands in the regular position on the hoods. As an exercise relax your arms by your side and then swing them up to shoulder level and note the orientation of your hands. If you’re anything like me the palms won’t be remotely parallel to each other, which suggests to me levers shouldn’t be parallel either. Having ridden like this for 12 months it’s seems ridiculous that the norm has been to have our levers pointing straight ahead for the past 100-odd years, when this could have been tried with then-current equipment at anytime time in that period.

Secondly it makes for a more comfortable, secure and aerodynamic position when in the ‘aero hoods’ position (where I’m crouched lower, with my forearms resting on the tops of the bars, and I’m gripping the tops of the hoods with my fingers nowhere near the brakes).

My guess is you will have a third benefit, which is that you might more easily reach the buttons from your default on-the-hoods position. In my brief simulations it feels like I’d get pressure in my forearms as I try to move my thumbs if my levers were in your position, but I don’t have any of that sensation when reaching with my thumbs from my hoods position.

But even if you can’t easily reach the buttons from emulating my lever position you might find it better overall for the same reasons I do, so give it a try.

Use a pencil and and draw a line on both the bars and stem where they meet. Then rotate the bars 1mm down using the line as a reference point. go for a ride and bring a Allen key with you. Then play around with the bar tilt till you find the sweet spot. Don’t over do it, adjust in 1mm increments as it doesn’t take much.

Di2 12speed shifters are somewhat bigger then then the 11speed. So yes, position or feel can differ. Once at the right hight, I tend to move the shifters a little bit inward, as this will accommodate the natural position of your hand/wrist.

To be honest the bar looks a little rotated upwards. Normally the bar end plugs should be in a vertical line with 90 degrees to the floor. So like this | and now they are more like \ and the flat part of the stis should be more like - maybe a little little bit up but in the end if you have no pain ride like it and keep it

i have small hands and Di2 and i can never reach the buttons comfortably without almost crashing

I suggest trying to hold the hoods with only your ring and pinky fingers between the bars and brake levers, rather than with three fingers in between. Your middle finger will move to being on the brake lever with your index finger. 

This grip not only allows better control for braking but also reduces ulnar deviation of your wrist, i.e. less strain. You will probably also find you have better access to the di2 button at the top of the hood with this position 

Try getting more of your palm on top of the shifter vs the side.

From the looks of it, you’re gripping the outside of the shifter. Just tried your postition on my bike - felt like I was going to slide down the shifter when I lifted my thumbs.