SuperATV Can-Am Heavy Duty 1" Aluminum Wheel Spacers - 4/137 mm bolt pattern (1 Pair) 100% Fitment guaranteed Heavy duty design 6061 billet aluminum Adds stability and clearance Lifetime warranty to the original purchaser. 4/137 mm bolt pattern : Can-am 1 pair (2 spacers total)(1.5&#034;/spacer) Heavy duty design Adds Stability 6061 aluminum construction