SKU: 81038619802
gravel bike rotor size

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

Sale price$20.11 Regular price$22.34
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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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SKU: 81038619802

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Tatoani
Lowell, US
★★★★★ 3
Not completely indestructible but definitely long-lasting with plastic bits everywhere
Color: 1PC-Beef-Red
It's destructible it just takes a long time and tons of tiny little plastic pieces everywhere and even in your dog's stomach would not recommend due to wear and tear on dog's teeth and the plastic chips off.
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Reviewed in the United States on May 17, 2026
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Audrey Davis
Belleville, US
★★★★★ 5
Great Product!!!
Color: 1PC-Beef-Red
This is the first toy my dog has not demolished. I need to buy more just like it just in case something happens to this one. It's worth every bit of the money I spent on it.
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Reviewed in the United States on June 5, 2026
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Timothy G
Whiting, US
★★★★★ 5
Chew incessant dogs
Color: 1PC-Beef-Red
Very tough, My Dashound is a Tasmanian Devil & young this has really slowed his roll, and still enjoying the chewing & licking with peanut butter. Great item!
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Reviewed in the United States on June 1, 2026
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Matthew Nichter
Natrona Heights, US
★★★★★ 5
Durable!
Color: 1PC-Beef-Red
Alright, here's a product review for those Tough Dog Toys: Finally, a Toy That Survives My Monster! - Tough Dog Toys Review As the owner of a determined (and I mean determined) large breed chewer, finding toys that last longer than five minutes has been a constant and often frustrating quest. I've gone through countless plush toys ripped to shreds, rubber toys with chunks missing, and even some "indestructible" toys that met their demise far too quickly. That's why I was both hopeful and skeptical when I came across the Tough Dog Toys, designed specifically for aggressive chewers and large breeds. Let me tell you, these bone-shaped nylon toys are living up to their name. My power-chewing Labrador has been going at this thing for days now, and I'm genuinely impressed. Where other toys have succumbed to his relentless gnawing, the Tough Dog Toy has held its own. There are some minor teeth marks, as expected, but absolutely no significant damage, no pieces torn off, and no signs of imminent destruction. "Almost indestructible" might actually be an understatement! The design is simple but effective. The solid nylon construction feels incredibly durable, and the bone shape is easy for my dog to grip and maneuver. It's also a good size for a large breed – substantial enough that he can really get a good chew going without it disappearing in his mouth. What I appreciate most is the peace of mind this toy provides. I no longer have to constantly supervise playtime, fearing that he'll ingest pieces of a destroyed toy. This feels like a safe and long-lasting option for even the most enthusiastic chewers. Pros: * Truly durable – stands up to aggressive chewing from a large breed. * Solid nylon construction feels virtually indestructible. * Safe design with no small parts to break off. * Good size and shape for large dogs to grip and enjoy. * Provides long-lasting entertainment. Cons: * May show some teeth marks over time (though this hasn't compromised its integrity). * It's a fairly hard material, so dogs who prefer softer toys might not be as interested. Overall: If you're at your wit's end trying to find a toy that can withstand your aggressive chewing large breed dog, I highly recommend giving the Tough Dog Toys a try. This bone toy has proven to be the most durable option we've encountered, offering excellent value for money and, most importantly, a safe and engaging chewing experience for your furry friend. Five out of five paws!
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Reviewed in the United States on April 23, 2025
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Elizabeth
Chelsea, US
★★★★★ 5
it was a bit too hard/small for my Great Pyrenees, so it didn’t work out for my dog specifically
Color: 1PC-Beef-Red
is good quality and feels very durable and well made. The material is strong and holds up well against chewing, especially for aggressive chewers. It’s also a nice design and seems safe for dogs to use.
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Reviewed in the United States on May 3, 2026

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