The title says it all. I'm up to riding 20 to 25 miles at a time, using my Surly Long Haul Trucker equipped with a Brooks B17. The saddle is very comfortable up to about the 15-mile point, then I start to get a "bruised" feeling in the bottom. It doesn't feel like a compression issue - not a tingly sort of numbness - but more of a painful sort of sensation that's hard to describe, almost like a bruised sensation. If I stop and get off the bike for 15 minutes or so, I can get back on and finish the ride with no further discomfort. I spend 99% of my time in the saddle, and not much time standing up to pedal. I do try, when coasting, to support my weight (about 260 lbs since the office Christmas party) with my legs, and to sometimes slightly shift my position on the saddle.
I normally wear shorts with chamois padding, but in the colder weather I have either thermal underwear and jogging pants over them, with maybe a set of wind pants over that if it's really cold.
I have about 300 miles on the B17 at this point.
The only other discomfort I've experienced since switching to the B17 has been a little chafing near where I contact the nose of the saddle, but that does not occur if I use a little lubrication - even if just petroleum jelly - as I'm dressing to ride.
Watcha think? Is this still just breaking-in pains? Should I try different shorts, maybe sans-chamois?
Looking for help - this issue is starting to be the limiting factor in the distance and time that I ride.