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SHIMANO · Disc brake adapters
Run a post mount caliper on a flat mount frame.
$39.99
PriceIn stock, ready to ship
Shimano's SM-MA-R140P/D lets you bolt a post mount disc brake caliper to a flat mount rear frame with a 140 mm rotor. Handy when you want to use a post mount caliper, such as many mechanical or older hydraulic models, on a newer flat mount bike.
Sold by Ashburton Cycles
Verified store
Price
$39.99
Position
Rear
Frame mount
Flat mount
Caliper mount
Post mount
Modern road and gravel frames usually use flat mount brake tabs, while plenty of calipers, including many mechanical and older hydraulic models, are post mount. The Shimano SM-MA-R140P/D bridges the two at the rear of the bike.
It bolts to the flat mount on your chainstay and gives you post mount tabs to fit the caliper to, positioned for a 140 mm rotor. The adapter is marked for 140 mm rotors only, so it won't give correct alignment with a larger disc.
It's a genuine Shimano part made to the brand's standard, so the caliper sits where it should and the pads meet the rotor squarely.
Riders and mechanics fitting a post mount caliper to a flat mount rear frame with a 140 mm rotor.
Flat to post mount
Fits a post mount caliper to a flat mount frame.
Rear specific
Designed for the chainstay mount.
140 mm rotors
Positions the caliper for a 140 mm disc.
Genuine Shimano
Made to Shimano's mounting standard.
Every detail as listed by the manufacturer.
SHIMANO · Disc brake adapters
Run a post mount caliper on a flat mount frame.
$39.99
In stockPosition
Rear
Frame mount
Flat mount
Caliper mount
Post mount
Rotor size
140 mm
Shimano's SM-MA-R140P/D lets you bolt a post mount disc brake caliper to a flat mount rear frame with a 140 mm rotor. Handy when you want to use a post mount caliper, such as many mechanical or older hydraulic models, on a newer flat mount bike.
Modern road and gravel frames usually use flat mount brake tabs, while plenty of calipers, including many mechanical and older hydraulic models, are post mount. The Shimano SM-MA-R140P/D bridges the two at the rear of the bike.
It bolts to the flat mount on your chainstay and gives you post mount tabs to fit the caliper to, positioned for a 140 mm rotor. The adapter is marked for 140 mm rotors only, so it won't give correct alignment with a larger disc.
It's a genuine Shimano part made to the brand's standard, so the caliper sits where it should and the pads meet the rotor squarely.
Riders and mechanics fitting a post mount caliper to a flat mount rear frame with a 140 mm rotor.
Flat to post mount
Fits a post mount caliper to a flat mount frame.
Rear specific
Designed for the chainstay mount.
140 mm rotors
Positions the caliper for a 140 mm disc.
Genuine Shimano
Made to Shimano's mounting standard.