I had a 3b tear and was back on my bike 3 weeks 5 days after. I’d actually felt ready to get back on it waaaaay sooner, but wanted to check with a Women’s Health Physio, I saw her at 3 weeks and 4 days and she said go for it.
I have been cycling a long time (I raced) and cycled throughout my pregnancy (most days).
The advice from my physio was to stick with the rollers (easy spinning) and build up gradually each day. After a few weeks I started going out on flat routes. I had to let my symptoms guide me - so heaviness/ increase in incontinence then back off. I found putting to much power down (so steeper hills, accelerating hard out the saddle etc) caused increases in symptoms (which I’d been warned about). I was also advised not to train as that’d slow down the healing process as my body would also be trying to recover from training.
I had a trip to Scotland at 3 months covering about 12 hours a week. At 6 months I was in the Alps and then Pyrenees, again averaging about 12 hours a week. The big problem I found was low back pain, initially just if I was on the bike more than an hour, then 90 mins, then 2 hours etc. I overcame that, but suffered once I hit the Alps, the long climbs over an hour hurt. Again, I overcame that. I put it down to weak core muscles, so did a daily half hour core routine (suitable for post-pregnancy, so not putting pressure on my pelvic floor).
Given you had a lesser tear and I did all that on a much worse one, i reckon just go with it and let your symptoms guide you. It’s really hard getting decent advice from health professionals - so many gave me horrified looks. Luckily my WH Physio is also a competitive cyclist so was actually able to give me sensible advice.
I’m now 16 months on and have a very mild bladder and bowel prolapse and also a descent of my perineal body. My only symptom is heaviness toward the end of the day. I don’t think all the cycling helped, but I don’t think it’s entirely to blame either. Physically and mentally I feel fantastic and getting out on the bike most days has helped me in so many ways.
Whatever you do make sure you militantly do your PF exercises and don’t stop, ever. View them as like teeth cleaning.