Question on using heavier tubes
Hello there - I am new to this forum. I have been biking now for two years, having logged over 2,000 miles to this point. There are aspects of biking that are new to me, so I thought I would come here for a few answers.
I ride a Trek Hybrid 7.2 FX. Nice bike - love the ride.
Recently, I had a double-puncture ride. So I went to a local dealer and he suggested and put in Bontrager Thorn Resistant tubes.
Now i notice when riding that it is more difficult to get to the speeds that I am used to. It seems "harder" to pedal. I am assuming that this is due to the tubes being thicker and heavier?
I was wondering if others have experienced this? Or if this is not true, then could it be the bearings that are making it "harder" to pedal??
Any input would be helpful - thank you!