8 mm x 30 mm (8 mm diameter bolt hole and 30 mm wide)
Park Tool offers quality tapping and facing tools for use on bottom brackets
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Item Specifications Bearing Type Sealed Cartridge Color Red Defined Color Red Front Axle 15mm Thru x 110mm Hub Drilling 28 Hub/Brake Compatibility 6-Bolt Disc Spoke Interface J-Bend Weight 157
Wolf Tooth 104 BCD Chainring - 30t, 104 BCD, 4-Bolt, Drop-Stop B, Raw Silver bike-multi-tool 8 mm x 30 mmFeaturing the proprietary mud clearing Drop Stop tooth design, these rings are designed to fit any 104 BCD crankset. Made in Minneapolis, MN with exceptional chain retention in mind, these chainrings are best paired with a clutch style rear derailleur. Drop Stop chainrings are designed for use with 1x9, 1x10, 1x11 and 1x12 drivetrains Compatible with all 10 , 11 , and 12 speed chains, with the exception of Shimano 12 speed chains Shimano 12 speed