(english isnt my native lang)

due to a pair of punctures on my butyl tubes, i ordered two cheap tpu tubes from aliexpress, for me they did a difference because they feel more comfortable (horrible streets and pavement here) and feel more easy to start and continue the pedaling, i dont know if there watts saving or due to weight, about installing them and construction:


the first thing i noticed is how difficult to install them on a 700cx23 tire and wheel, i discovered that if i inflate (very lightly) the tube and massage it to let the air flow all the tube it will be easier to mount it first onthe tire (the tire horizontal on the floor) and then install on the wheel also lying horizontal on the floor,compared to butyl im usually quicker installing all with the wheel and tire vertical but maybe is about practice, also the plastic presta valve feels "ok", but the endings where you unscrew the cap protection, feels something sharp on the center screw of the presta valve, the body of the valve is plastic, the center and screw cap are metal


I put the tpu's to improve something of my ride becaues i use that vintage road bike to some fitness on my neighborhood, but if i go further distance than 5 or 10k i have two butyl tubes ready on my detachable tool bag, that for sure I will carry on higher distances...