The Mitas TERRA FORCE-EF PRO is Mitas&'; competition-only GUMMY rear tire. Proven over several seasons of testing and racing by some of the world&';s top hard-enduro racers and now available to the public. Rear pattern for maximum traction in the most technical enduro conditions: choice of Hard Enduro Pro Riders. - Tread designed for maximum grip and performance in hard, rooty or challenging conditions- Competition ONLY tire, for use with a Mitas Mousse.- Mousse application or UHD TT (Tube Type) recommended. Standard Tube use not recommended - Super Soft Pro (Extreme Enduro) identified by the characteristic double green and purple stripe: extremely lightweight, ultra-flexible carcass with an ultra-gummy compound provides an increased contact patch for excellent grip in challenging, low-speed technical sections.