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  • Shimano Flat Mount Disc Brake Adapter
  • Shimano Flat Mount Disc Brake Adapter
  • Shimano Flat Mount Disc Brake Adapter
  • Shimano Flat Mount Disc Brake Adapter
  • Shimano Flat Mount Disc Brake Adapter Detail
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ShimanoFlat Mount Disc Brake Adapter
Sale 40% Off$10.80 - $21.83

Item # SHI00B1

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  • Rear, Flat Caliper To Flat Mount, 160mm ($10.80)
  • Rear, Post Caliper To Flat Mount, 140mm ($19.19)
  • Front, Flat Caliper To Flat Mount, 140/160mm ($20.02)
  • Rear, Post Caliper To Flat Mount, 160mm ($19.19)
  • Front, Post Caliper To Flat Mount, 140mm ($21.83)
  • Front, Post Caliper To Flat Mount, 160mm ($17.99)
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Item # SHI00B1
Description

Adapt.

Whether you're in paradoxical possession of post-mount brake calipers and a flat-mount frame or just need to correct flat-to-flat mount adapter to fit your chosen rotor size, Shimano has a Flat Mount Disc Brake Adapter to get you up and running (and stopping) in a flash. Available in a variety of post/flat and flat/flat combinations to accommodate 140mm and/or 160mm rotors, this adapter installs quickly and ensures your calipers work seamlessly with that shiny new frame.

  • Adapt flat-mount calipers to different mounts and rotor sizes
  • Available in post/flat and flat/flat combinations
  • Options for both 140mm and 160mm rotors
Tech SpecsWeight
Tech Specs
Compatibility
140mm rotors, 160mm rotors, post-mount disc calipers, flat-mount disc calipers
Recommended Use
maintenance
Manufacturer Warranty
2 years
Weight

Actual Weight

Actual weights are measured in-house by the Competitive Cyclist team.

Have questions? Chat with a Gearhead

Grams

Oz

Rear, Flat Caliper To Flat Mount, 160mm
50g
1.76oz
Rear, Post Caliper To Flat Mount, 140mm
31g
1.09oz
Front, Flat Caliper To Flat Mount, 140/160mm
11g
0.39oz
Rear, Post Caliper To Flat Mount, 160mm
50g
1.76oz
Front, Post Caliper To Flat Mount, 140mm
31g
1.09oz
Front, Post Caliper To Flat Mount, 160mm
50g
1.76oz

Reviews & Community

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Avg. ride time: 7h 11m per week
  • Average ride time is based on Strava activity over the last 3 months. Give your reviews credibility by connecting your account.

Worked as advertised

  • Familiarity: I've put it through the wringer

Converted my 140mm rear rotor on a BMC Roadmachine 01 to 160mm so I could interchange wheels from several bikes. Easy to install. No worries here.

Adaptive

  • Familiarity: I've used it once or twice and have initial impressions

If you need to fit post-mount calipers onto a flat-mount frameset, these little adapters are the way to go. The end result might not look as clean as using a flat-mount caliper, but I'm more than happy to make that compromise if it lets me save the few hundred dollars a new brake system would cost.

Life Saver

  • Familiarity: I've used it once or twice and have initial impressions

So I just got a new gravel bike and the ENVE Gravel road fork that came on the frame is the new flat mount standard. The SRAM RED Hydraulic disc brake set that I have is a post mount. I really did not want to buy a new caliper for this new standard, admittedly it would have a cleaner look if I used a flat mount caliper, but I really did not want to shell out extra cash. In comes the Shimano flat mount disc brake adapter to the rescue. I picked up the 160mm "Front Post to Flat" adapter and voila! Everything was right in the world again.

The description indicates that this adapter allows for installing a flat-mount caliper on a post-mount frame. Is this true? If so, which ones would I need for front and rear? "Post to flat" to me would mean you have post calipers you need to install on a flat frame, so I was looking for an item called "flat to post"--but do I have this backwards?

Thanks in advance.

Hi, so this mount is for installing a post mount or standard brake caliper onto a flat mount frame.

Right now there are no adapters that would allow flat mount calipers on post mount frames. The one you mention means adapting a post mount caliper to a flat mount frame. I am glad I called shimano before being really dissapointed once I ordered it.