a thorn tube plus sealer came into sight after reading a recent post on
HD touring tires. I use a thorn proof 700 as a spare tube. Quality is
very good-the cost's $8 and the tube feels like $8
add the thorn proof with sealer to the conti tt-a tight fit- but the
700 I use goes on a 27" rim with liner and shimano deore hub/25
bearings/cycle bearing grease/14 dt spokes/cr-18 rim-will hd tour for
1500-2000 miles before service
http://www.specialized.com/bc/SBCEqSection.jsp?sid=05EquipTubesAll
http://www.specialized.com/bc/SBCEqProduct.jsp?spid=10860
sealer http://www.specialized.com/bc/SBCEqProduct.jsp?spid=10859
tubes with sealer
http://www.specialized.com/bc/SBCEqProduct.jsp?spid=10871
tubes without sealer add your own
http://www.specialized.com/bc/SBCEqProduct.jsp?spid=10876