My wife and I are new to tandem biking and I found my fingers getting numb from holding the bar. When I ride my road it also happens but I can use my aerobar for a change of position to get a break. We are going on a bike tour in Wyoming in the summer and I was worried about doing 450 miles in 6 days. My LBS told me about the Bontrager Buzzkill bar end plugs and I tried them. I can't believe the difference they made. After a 2 1/2 hour bike ride my hands still felt great. The plugs have a brass insert with a soft rubber around them that cancel out the high frequency vibrations. I am amazed something so simple and inexpensive (under $20.00) can work so well. I just wanted to let other people know about these bar plugs in case any one else has a similar problem.