Check the listing for details. SRAM GX Eagle DUB WIDE Crankset 1x12s 170mm x 32T BOOST 148mm Lunar Gray. Color: Gray, Condition: New. Listed at 99.90 USD. Simply put, the forged aluminum GX Eagle DUB crankset is the no frills choice of riders who know. Chainring Size: 32T. Arm Length: 170mm. Color: Lunar Gray. Chainring Mount: SRAM Direct Mount. These cranks provide a 55mm chainline which is compatible with SuperBoost 12x157mm rear hub bikes, but also compatible with newer Boost 12x148mm bikes to allow the use of larger than spec chainrings or to fine tune your chainline.Simply put, the forged aluminum GX Eagle DUB crankset is the no frills choice of riders who know. Chainring Size: 32T. Arm Length: 170mm. Color: Lunar Gray. Chainring Mount: SRAM Direct Mount. These cranks provide a 55mm chainline which is compatible with SuperBoost 12x157mm rear hub bikes, but also compatible with newer Boost 12x148mm bikes to allow the use of larger than spec chainrings or to fine tune your chainline.