The challenge fango open 33 700c clincher folding cx tyre is the pros choice for perfect traction in wet muddy conditions this cx tyres is ideal for all weather dirt hardpack loose dirt and light mud hardpack applications a special fabric is placed between the tread and casing to increase puncture resistance pps puncture protection strip technology open tubular differ from traditional clinchers for the construction the tyre is produced just like a tubular and uses the same materials