Industry Nine Torch 6-Bolt Front Axle End Cap Conversion Kit Converts to 9mm Thru Bolt Model=ChainSpy Chain Retention System They are the perfect match

They are the perfect match to Promax CF-2 and HF-2 cranks and ultimate upgrade to the budget BBs sold with most crank sets

}Shimano Tiagra ST-4720 10-Speed Right Shift/Brake Lever for Hydraulic Disc Brake

Color Black Ring Position/Type Single Tooth Count 51 Drivetrain Speeds Single Speed 1/2" x 1/8" Chainring BCD 144 Material Aluminum Defined Color Black

}Shimano Tiagra FC-4700 Crankset - 175mm 10-Speed 50/34t 110 Asymmetric BCD Hollowtech II Spindle Interface Gray

Waterproof 5mm neoprene construction with nylon lamination inside and outside

Industry Nine Torch 6-Bolt Front Axle End Cap Conversion Kit Converts to 9mm Thru Bolt Model=ChainSpy Chain Retention System They are the perfect matchIndustry Nine Torch 6 Bolt Front Axle End Cap Conversion Kit: Converts to 9mm Thru Bolt. Industry Nine Torch end caps allow the conversion to a variety of front axle standards. Includes a pair of end caps