+1
I'm 53 and regularly go over 175 peaking at 185 when I'm pushing hard on climbs (just fitness riding, not racing).
My resting pulse is still about 40, and I've ridden regularly (currently about 5000 miles per year) since I was 12. Like you, I can get high numbers (much more than 220 - age) without feeling stressed at all. If you feel ok and your rate comes down quick when easing off, I wouldn't worry about it.
I used to have a monitor that occasionally read 228 if there was a transmission fault, as that was the default max.
But it's risky getting cardiac advice on a forum
