Hi Everyone! I am repeating this post everywhere I can because I have solved this problem for myself! I experienced this problem for many years. It got the point where I became very concerned that I would have to quit riding. Sometimes it would happen very quickly, within minutes. But never fear, there is a solution for you! I ride with zero numbness even on long rides. As a bonus, my fatigue level has been greatly reduced. Now I am not saying that this will be your solution, just that you can find one. Here is my story. First of all, I don't have a specific riding style. I love to climb, with fast downhills. I also ride single track and technical stuff sometimes. I have been riding for 25 years. First step: Saddle and saddle position. I tried several new "ergonomic" saddles, none helped much and some made it worse. The best was the Specialized Romin Expert, which I still ride. The impact was modest, but better was better. I also experimented with saddle position and height. It turns out the saddle was a little too far back. Good for climbing power, but bad for the groin. Again, this was only modest help, still got numb, just a little less. Second Step: Pedal position. Tried several. In the end I found that just behind the ball was good. Between the ball and mid-foot. Helped me overall, but not numbness. Third step (aka Eureka#1!): Handle bar length/rise. BE SURE TO READ THE CAVEAT AT THE BOTTOM. For 20 years I had my set-up very narrow, straight 420mm bars with no rise. No one would ever set a bike up that way now, but the idea was to have strong climbing and it was great for that. I had no problems with downhill speed. I read that wider handlebars are generally better for a number of reasons, including this. Stem rise is also a factor. I moved to wider, 730mm riser bars and it helped right away! It was night and day! Almost no numbness! Fourth step (aka Eureka#2!): Stem length: AGAIN BE SURE TO READ THE CAVEAT AT THE BOTTOM. I had been riding with a 120mm flat stem for 20 years. I had no idea it could have any relation, but I was wrong. I moved to a 100mm 30 degree rise and it was great. Problem solved! It seems that being more upright was the real key to resolving the issue. CAVEAT: BE CAREFUL CHANGING BAR WIDTH AND STEM LENGTH. Everyone gets used to a bike fit/set-up. This warning is especially true if you have been riding a long time like me. Control of the bike changes dramatically with bar width and stem length, so take it one step at a time. I made a huge mistake moving too far to fast. I changed to 720mm riser bars and 100mm riser stem at the same time. Fatigue and numbness was improved immediately, but handling and climbing was VERY different. Lots of steer wander and harder to keep the front wheel on the ground when climbing steep in seated position (standing was improved). I decided that what I needed (based on reading articles, etc) was a shorter stem. I went with a 50mm. Huge mistake. On the first ride I was unable to keep the front wheel down and fell backwards and broke my wrist. Moral of the story: Make changes one at a time. Ride easy and figure out what works. Bars can be easily trimmed with a pipe cutter. Start wide and narrow until it feels right. Get used to it and work on the stem. I now ride a 680mm riser bar and 100mm 30 degree stem. I am much more upright on the bike, which relieves numbness and I also find I am less fatigued. I gave up a little climbing power, but there is no doubt it was worth it! Good luck! Travis