Originally Posted by
randomgear
Umm, wouldn't the weight of the sealant increase the weight of the tube? Why not go with butyl and not have to add sealant; save the latex for race days.
Weight reduction isn't the main reason for latex tubes. They are more supltle and better conform to movement of the tire shape. So the tire complies better to the road surface. That reduces rolling resistance and also a better ride.