Originally Posted by
stapfam
Would estimate that the thorn proof tubes are between 3 and 4 lbs. and that is right at the extremity of the wheel. The hardest place to get it to accelerate- but once up to 30mph- it will assist on speed.
Stepfam, I bet you're estimating for a mountain bike. These are 32s and they weigh in at 15 ounces as opposed to my regular inner tubes, which are about 5 ounces.