I ditch them on tube wheels, they can stop a tyre rattling if your set up isnt right but some tubed stems actually come without them (when I used tubes they were my preferred type). 15-20 seconds to remove them (more if they have seized like earlier posters) and the same again to refit isn't a big deal when you ride on your own but when you ride in groups/ races its something you can do without.
It can also aid when pumping if you have a press on pump as it stops the valve core moving around too much.
It also keeps the valve in place if you have to wrestle the tyre back onto the rim and the valve cap prevents a rolled up tube from puncturing itself.
Couldn't you rest the rim on the ground and tread on the side of the tyre to let your weight do the pushing for you?
The collar nut helps to lock the valve in place. On a tubeless tyre this helps the seal - try unscrewing one - and on a tubed tyre it prevents the valve rocking during inflation.
Same here, valve caps present an opportunity to have a smart coloured bling adornment on your best racing stead!
I was on a ride with someone who punctured and his valve cap, which matched the cable housings of his beautiful Colnago, became lost in the grass. I have a photo somewhere of about four cyclists on their hands and knees, desperately searching for it.Same here, valve caps present an opportunity to have a smart coloured bling adornment on your best racing stead!
