As promised, I am bringing you your weekly humpday fix of bike pron. Pictured here is the Challenge Limus 33 Cyclocross tire. Like most people who follow cyclocross, I chose these tires both for their functionality and their looks. I have them installed on my grass racer to give it that old-school mountain bike look. They kind of remind me of the old Panaracer Fatrax tires from the 90s. Speaking of 80s, they retail for about $80.00 per tire. Boom!