I get where you are coming from as I myself am 179 cm and now around 85 KG (was 95KG when I started cycling last year April) and I too am broad in the shoulders and back.
Ever seen a cartoon where a circus bear rides a on small tricycle? That’s basically me (I was even given a shirt by my friends with that image on it).
I am not sure if you race, I don’t but what I have learned the last year when it comes to cycling and body types is that you should create your own identity on the bike and feel good about that.
When I started cycling, I started doing rides with a friend who was then about 12 kg lighter than me and had been cycling longer.
I followed his way of cycling including climbing style etc, it was hard but it helped me get to a higher level a lot quicker. But at one point I started realizing that his way of riding, especially up hill just didn’t suit me and try as I might I was not going to keep up with him up hill.
So I changed my climbing style, instead of doing small burst/recover I started doing a more sustained power type of climbing, pick 1 gear, 1 cadence. That was a game changer for me, all of a sudden the difference on the climbs between the two us shrunk significantly.
I like being on the front of a group doing the work, or dropping back from the first group to the riders that fell off to help them close the gap back to the group.
I don’t like being behind someone for a long period of time, and if that hurts my climbing times I don’t really care anymore, one of the reasons the guys get better times on the climbs during such a ride is because I did a lot of work for them. I started seeing it as combined achievement.
At the end of the ride we all ‘cross the line’ at the same time and everybody got to enjoy that part of cycling they like the most.
I also started MTB’ing a bit since January or so, this helped me to see things more in perspective when it comes to my road biking. I might not be the fastest on the tarmac, but the guys I ride with on the road won’t be able to hold my pace on the dirt.
I guess MTB just fits me more.
Guess what I am trying to say is, don’t put emphasis on what you might perceive ‘negative’ points of your body but try to find a way that they can make you feel positive/proud.
Does that mean you shouldn’t try and work towards certain goals such as being a faster climber or being lighter in general?
No, but you might have to accept it’s going to take a bit longer but if you are to focused on negative aspects at the moment it’s going to take longer as it’s taking the fun out of cycling.
I saw you were using a Whitings scale, I use one was well.
Check the manual for athlete mode what the criteria are for that and if you meet them, your plateau could just be ‘faulty’ readings because you don’t use your scale the way it’s intended.
I hope this helps in some way, just to try to keep the cycling fun for yourself.
What’s the sense in riding and spending so much time on it if doesn’t make you feel good.