Originally Posted by CigTech
The big problem I have with the Denail is the tubes. That is too say finding replacement tubs. Because of the long steam needed for the rims. I'll send a e-mail to Kent bicycle to see if I can get them from them. The two flats I have had was due to the rim tape. I have replaced the rim tape and have not had a flat sents.
You can get inserts to size schreader rims to presta. These fit in the tube side of the rim, so there will still be a gap at the outside but that should not cause a problem, and you will be able to use easy to find long presta valves.