Great weather, low 60's. We took a new route in which let my wife's muscles warmup before any good hills. I was in route to my doctor's office and had the rear tube blowout while I was doing about 20. Fortunately, the doctor and the LBS were within easy walking distance. Had to replace the rear tube and tire; the sidewall had worn off from the wire rim, after only 800 miles! The LBS (Bike South near Emory Univ. in Atlanta) let me change the tire inside the store and offered the use of their air pump--nice!