Seems I've been riding around with an almost completely closed right coronary artery!!I mean about 2300 miles worth since the beginning of May when I bought my Trek.Last week I took an 84 miler.Since I had a heart attack 9 years ago I had a stress test which looked questionable to the cardiologist.He ordered an angiogram which revealed the blockage.3 stents were inserted with great difficulty(they couldn't find a path it was so blocked)and now I'm recovering,dieing to get back on trhe bike(no pun intended)Since I started biking,I lost 22 lbs.my BP plunged my other vital statistics improved markedly and I could have dropped dead with a heart attack at any moment!!Careful folks!!