The 90/65-6.5 tube is one of the most common tubes used on 11" tubed tyres such as X11-DDM models of Zero 11X & Dragon Hunter X11. and the VSETT 11+. The valve has a 90 degree tilt.
Non-CST branded, ~140gram with 5mm longer Brass Stem offset 10mm from centre with a 60 degree tilt.
CST branded, Thickened 167 gram with Silver coloured Stem in centre with a sharp/acute 90 degree tilt (as per product images). Our most popular variant.
Non-CST branded, Ultra Thickened 190g with 5mm longer Brass Stem with a sharp/acute 90 degree tilt (similar to the product images of CST).