Once upon a time Panaracer had polyurethane tubes. Very light, did not stretch much so sizing had to closely match the tire size. Very light and hard to puncture but they seemed to have disappeared.
Added a comment about photo Superlight Tubes for Steve Peat's DH Bike at Fort William? 6/7/2013 6:36 PM
0 0 0
This photo has 12 comments.