S&M Mid School 39t BMX Guard Sprocket Chainwheel - Matte Black - USA Made 36t Derailleur Shifter: Shimano Revo 7-spd

Derailleur Shifter: Shimano Revo 7-spd

5 takes advantage of the intermediate sized wheel on 27

This is similar to the Primo Hemorrhoid seat

Handcrafted Since 1866

This freewheel will work with 1/8" chains

S&M Mid School 39t BMX Guard Sprocket Chainwheel - Matte Black - USA Made 36t Derailleur Shifter: Shimano Revo 7-spdThis sprocket first appeared in S&M's 2005 catalog as the Bashguard Sprocket and then simply as Guard Sprocket in the 2006 catalog. Fast forward to June 2024 when S&M Pro Aryei Levenson started riding a used sprocket and single handedly created the demand that led to this slightly updated re issue. On this current version S&M has widened the crank clearance cuts a little, updated the teeth to a modern profile, and offset the teeth as well for better