This sprocket first appeared in the S&M 2005 lineup as the ‘Bashguard Sprocket’ available in 33t, and then simply as ‘Guard Sprocket’ in 2006 when it began being offered in 25, 28, 30, 33, 36 and 39t. Fast forward to June 2024 when S&M Pro Aryei Levenson started riding a used 33t he got from Shad at Goods BMX and single-handedly created the demand that led to this slightly updated re-issue. On this current version S&M have widened the crank clearance cuts a little, updated the teeth to a modern profile, and offset the teeth as well for better chain alignment. Made in USA Four mounting positions 1/8″ teeth CNC machined 6061 T-6 15/16” (24mm) center bore (19/22mm steel hat washers included) Compatible with 19mm, 22mm and 24mm spindles Sizes 25t, 28t, 30t, 33t, 36t, 39t ###section### Product Specs TYPE: Bolt On MATERIAL: 6061 Alloy WEIGHT: 0.28lbs (127.6g) Colour: Matte Roast, Matte Black; Size: 39T, 30T, 33T, 25T, 28T, 36T