gravel bike rotor size 180mm Disc Rotor Adapter for flat mount road/gravel forks – PEAKTORQUE
SKU: 58758805004
gravel bike rotor size

gravel bike rotor size 180mm Disc Rotor Adapter for flat mount road/gravel forks – PEAKTORQUE

Sale price$26.45 Regular price$29.39
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Description

gravel bike rotor size 180mm Disc Rotor Adapter for flat mount road/gravel forks – PEAKTORQUEADD THE REAR ADAPTER FOR 15% OFF WITH THE CODE: 180BUNDLE On peak torque. com since 2022 I created these adapters because at the time, there was no solution to road gravel 180mm brakes. The original. Here it is. The PT BBC 180mm adapter allows you to run a front 180mm disc rotor on your 160 140mm flat mount fork (as per the Shimano standard). Road, gravel, and bike packing. The aim here is to increase the thermal headroom of your disc, pads, and

ADD THE REAR ADAPTER FOR 15% OFF WITH THE CODE: 180BUNDLE

On peak-torque.com since 2022 - I created these adapters because at the time, there was no solution to road/gravel 180mm brakes. The original. Here it is. 

The PT BBC 180mm adapter allows you to run a front 180mm disc rotor on your 160/140mm flat mount fork (as per the Shimano standard). Road, gravel, and bike-packing. 

The aim here is to increase the thermal headroom of your disc, pads, and caliper pistons if you are a heavier rider trying to dissipate large energies in hilly and prolonged fast braking situations. This will increase the lifespan of the pads and discs. A secondary although lesser benefit is an increase in peak braking force. However, if you brake with the same deceleration as a 160mm disc then the braking force will be the same! 

Made from 7075-T6 Aluminium, with all hardware included.

Note: Your existing fork caliper mounts must closely follow the Shimano specification of the 70mm hole position tolerance. As there is little wiggle room for the counterbored mounting fasteners, please check your fork is well made, faced and accurate before ordering. Please check the disc clearance and fork mounting tab clearance illustrations below. 

Note 2: The peak braking force will increase by at least 12.5% over a 160mm disc. The increase in braking force is given by the larger disc diameter and reduction in temperatures at the pad. The small increase in braking force should be well within the bicycle's design safety factor but the use of this adaptor is at the user's own risk. It may not be validated by the user's fork, frame, or wheel manufacturer. Any damage, injury or death incurred arising from such use will not result in any liability incurred by Peak Torque. 

Note 3: You must use the fasteners provided so as to not interfere with the fork, and it is recommended to use a low strength thread locker (e.g. Loctite 222) on all fasteners.

As featured on bikepacking.com:

https://bikepacking.com/gear/180mm-brake-rotors-on-flat-mount/


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Exchange/Return Notes
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SKU: 58758805004

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Amazon Customer
Lowell, US
★★★★★ 5
Works
Size: 8.5"x11"
Crisp transfer and doesn't jam my printer, win, win.
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Reviewed in the United States on December 28, 2025
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Mary Holmes
Draper, US
★★★★★ 4
Nice pp
Size: 8.5"x11"
Works good but kind of expensive
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Reviewed in the United States on April 23, 2026
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funnygirl
Omaha, US
★★★★★ 5
Good choice in sublimation paper!
Size: 8.5"x14"
Good printer compatibility with my Epson printer. Very smooth. No jamming in my printer. I use a lot of of sublimation paper lots of projects going on. Need to def to stock up
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Reviewed in the United States on February 12, 2026
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Crystal
Omaha, US
★★★★★ 5
Good quality
Size: 8.5''x11''
Great quality! I love this brand
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Reviewed in the United States on April 25, 2026
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April
Fort Morgan, US
★★★★★ 5
Works great
Size: 8.5''x11''
Thank you
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Reviewed in the United States on April 2, 2026

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