I've gotten back into cycling after a long time. I ride 25k to 40k three times a week and have almost 300k on my new bike, a Giant FCR2. As far as I can tell I've gotten over most of the newb soreness except for my butt, which occurs while riding rather then after. My bike has a WTB Laser V Comp seat which I've read is not very popular.
How long should I ride with this seat before I can actually blame the seat and not myself for being sore?
Some say 100 miles (161KM) some say 500 miles (805KM). I usually know within 100 miles and mine was a Brooks. My WTB saddle on my MTB bike fit great the first ride. However, given that you haven't ridden in a while you may want to give it a bit more time.
Yeah I've played with the seat angle. Just seems to change the sore spot a bit. I get sore where my butt cheek meets the back of my thigh (sorry don't mean to paint any mental pictures). I'm tempted to say it's not a newb issue because as it happens during the ride, not soreness the next day, that I'd see being a newb problem. I've even had to cut my ride short a couple times because of it.
Looking at the seat it looks like one of the ones that just look big and cushy but not really properly designed. Also I noticed a big fat stitching that might be the cause of my problems... why would they make big fat stitches along the top and down the sides of a saddle? My LBS has a seat loaner program where you can take one home and try it for free (really great idea IMHO), I think I'll get one just to compare for tomorrows ride. I'm not afraid to admit that I'm a cream puff but I don't like the idea of a bad saddle keeping me off my bike, especially since I'm trying to stay motivated while getting back into it.
Our shop offers the same WTB Test Ride program. Definitely take advantage of it as it really sounds like a saddle shape issue.
If you have a Specialized dealership nearby, you may ask if they have an Ass-O-Meter. Funny name, but I used one and have found the most comfortable saddle for me to be the Rival SL in a 143mm width. YMMV.