Post Mount 140mm

Brake Caliper Interface - Post Mount 140

Two parallel tabs that protrude from the non-drive side of a frame or fork which allow a Post Mount disc brake caliper to be mounted. The length of these tabs can vary which affects the position of the disc brake caliper and what default size of disc brake rotor can be used. 

Post Mount 140mm tabs are designed for use with a 140mm disc brake rotor by default. If the rider wants to replace the disc rotor with a larger 160mm rotor than a +20mm adapter is needed to space the tabs from 140mm to 160mm.

It is worth noting that a +20mm disc brake adapter is only approximately 10mm thick. The diameter of the disc rotor may increase by 20mm but the radius only increases by 10mm. If the adapter was 20mm thick it would enable a disc rotor that was 40mm larger in diameter to be installed. Disc brake adapter sizing names are based off of the disc rotor diameter they accomodate, not the radius or actual size of the adapter. 

BYKAID: 
SP.700.1.5

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