Enter the trailhead getting your feet wet in the world of mountain biking should be about raging across that first stream on two wheels not emptying your pockets for the toll with hydroformed alloy tubing and 275 wheels the gt avalanche is the perfect platform for the value conscious rider who isnt willing to skimp on performance frame all new 6061 t6 aluminum frame w triple triangle replaceable derailleur hanger disc brake mounts and zerostack tapered 1 18 1 12head tube 275 designfo