Originally Posted by
DeathCurse7
So i wanted to save some money and just repair inner tubes with a patch kit. I was wondering if this would increase my rolling resistance?
Yes. Does it make a difference? Depends. If you're a contender for the hour record or time trialling at the Olympics, the fraction of a watt difference could be an issue. For ordinary mortals, however (including most of us who race), the difference isn't enough to measure.
Personally, my race day wheelset is either tubular or tubeless. When I was racing on tubes, my race day wheelset had an unpatched latex tube. But I wouldn't (and haven't) hesitate(d) to use my backup wheelset with a patched tube in a race, and will train on patched tubes all day long.