After six rear flats in the last three weeks on our Burley Rumba we puchased over the winter, I am asking for some advise. After purchasing in November and one rear flat on a 5 mile test ride in the winter I removed the 700 x 28 old Conti gum wall tires last month before riding season and installed new tubes and new Conti Ultra Sports in 700 x 25 because that was the original size tire for the bike.
Up until last week I had five flats on the rear tire always about 15 - 20 miles out with the result being one small hole in the tube on the rim side. After reading many posts I realized for sure I was in the wrong tire. I bought two new Conti Ultra Gatorskins in 700 x 28 and more tubes. I showed my rim to a mechanic and we found a area where the rim tape had only covered about 95% of "one" spoke hole. I felt like we found the problem. Installed new Velox rim tape on the rear wheel new tubes on front and back and the new Ultra Gatorskins.
Went for a ride yesterday, again 15 miles and a rear flat but this time only a mile from the truck. After calling a couple of fellow riders on my drive home I stopped by a road racers home and we carefully dismounted the tire and tube to pay attention to locations and positions to find the cause. Suprise, the new Velox "adhesive" backed rim tape has moved over to the natural center radius of the rim again and exposing "two" partial spoke holes and I have two small holes in my new tube this time.
I went to a bike mechanic this morning and he sold me a roll of 22mm Velox, It fit beautiful until I got about six inches from where I started and I was out of tape. It is obviously for a 26" rim. Now it is going to be in the 70's today and I am pulling my hair out.
If you are willing to give me advise, here are some answers to some of the questions you might ask:
1. Team weight is about 350 lbs.
2. Rims are Bontrager Fairlane (spoke holes in rims are all off center to the one side)
3. Never had a flat on the front, it still has the original Velox rim tape.
4. No, I never tried glue in addition to the self adhesive. Please advise.
5. The tape is 17mm wide, the 22mm that I tried this a.m. fits perfect but not long enough.
6. No. I have not ran electrical tape on the side next to the rim tape. Please advise.