I got a new saddle late in the season where I live and have now had it for about 4 months of some outdoor but mostly indoor training.
i realized that it’s telling me something about my fit with the pattern wear on the top of the saddle. It seems like I’m sitting more to the left or putting more weight on the left. I know my left leg is stronger but this saddle set up as is feels good.
Am I just overanalyzing? Have you experienced this? Any thoughts or recommendations are welcome.
Sitting to one side could mean you need to lower the saddle height.
Beyond that, rather than trying to pretend that i’m a bike fitter, I’ll suggest you go watch a load of BikeFitJames YouTube videos, as he deals with that very issue for a few riders.
+1 for BikefitJames, I’d also recommed the seires with Neill Standbury (https://www.youtube.com/@roadcyclingacademy/videos), which helped me a lot in sorting our positional issues.
There’s a good chance that either:
Your cleats are wonky;
Your saddle is too high, so you’re twisting your pelvis to accommodate your shorter leg;
Your saddle is too narrow, so you’re sitting wonky to reduce pressure in the middle - better to have one of the sit bones supported than neither;
The saddle itself isnt perfectly level;
A combination of the above
Isn’t it also a question of mileage? If this pattern appears after many many kilometers I would probably not worry about it too much… and never rule out possible differences from production
If you’re indoors a lot, I would also check if your trainer is 100% level. Can’t tell what trainer you’re using, but there are also trainers (looking at you, kickr core) that have more “give” to one side, as the weight is not properly centered on the feet.
That being said, I’ve had a fancy bike fit with pressure analysis and have a bit more pressure on the right sit bone always. But don’t think I have had any issues for it, nor could it be “solved” by the fitter. So maybe it’s also not really a problem for you?
(Take my answer with a grain of salt though, I’m not a bike fitter)
Many people have legs that are slightly different in length. Could be that. Shims can be put on your cleats to sort this.
Could also be imbalance as you state. And agree with what others have said as well with there suggestions.
Highly recommend a bike fit with a good fitter. The best value for money on an upgrade for comfort and power.
The first question you need to answer is “Are you experiencing any pain / discomfort on the bike?”
Just because there may be some asymmetry at play does not necessarily mean you need to change anything.
Also, indoor riding =/= outdoor riding. You tend to spend more time on the saddle indoors than outdoors. Many people also have a different position for both.
I have a similar experience. I use a B-17 for most of my bikepacking and have noticed a depression in the saddle on my left side which makes me wonder if my left leg is shorter. I definitely have a visual imbalance on hip height when looking in the mirror. On my next most popular saddle, a Spez Power saddle, I can get a small chafe on my left side. I will check out some of the links shared. Thanks.
Your left leg can still be shorter overall even if your left femur is longer…. or your left hip is a bit forward… or you have more gluteus maximus on that side… or your other knee pad sticks out more.
The whole has so many variables it needs an xray to properly find out, so I would not put too much weight on any home test like this.
not sure about x-ray, as what would it tell you other than your legs are different.
What’s needed is analysis by a good bike fitter, who can step back and observe left/right balance, leg extension, hip angles, the plane that the knees are moving in (I.e. is one or both moving outward when pedalling), pelvis stability, etc. They will also have a range of known possible mitigation interventions for any observed issues, and observe the effect of any change to determine if a particular mitigation is appropriate.
Yeah, it won’t help your bike fit since that is about functional movement and ranges. But it’s what physiotherapists have told me is the way to actually measure a leg. I only commented to say a home test like sitting on the floor won’t really tell you that… not to recommend you’d go to an x-ray for sitting better on your bike 
I’m on a JetBlack Victory so “not” a Kickr Core. That could definitely have something to do with it. I don’t have any real discomfort on the bike at this point so maybe it isn’t a problem.
