1.800.651.4050 Mon-Sat 8am-5pm PT
Shimano Disc Brake Adapter - Post Mount F203P/P Shimano Disc Brake Adapter - Post Mount F203P/P
Click to zoom

Disc Brake Adapter - Post Mount F203P/P

Mfg PartNum:ISMMAF203PPA
  (2 customer reviews)
Earn $1.29 in Rewards credit. Click to learn more.
This color/size is not eligible for Rewards points
In Stock Now
This item is currently not in stock. Click Notify Me to receive an email when the item becomes available.
InstantPrice MatchWhat is this?
Free Shipping on Orders Over $50*

More power.

Up your stoppie game with the Shimano F203P/P Disc Brake Adapter that let's you run a 203 mm rotor with your Shimano 74mm caliper and post-mount fork.

Claimed weight is 21 g.

B-Stock - This product has one or more B-Stock units available. These units can be purchased at a discount (see option select). B-Stock units were returned from other customers and may have missing or damaged packaging materials. These units are otherwise as new. The full manufacturer warranty applies. Click Here for more information.


Mfg PartNum: ISMMAF203PPA 


Brake Parts: Caliper Adapter 


Hub Compatibility: All 

Ordered by Most Relevant First
5 stars
4 stars
3 stars
2 stars
1 stars
Just what you need for a 203mm front disc
by interactive3
Cycling Enthusiast

This disc brake adapter worked perfectly to upgrade my front disc from 180mm to 203mm. Unfortunately the adapter does not come with screws so the correct length screws must be obtained separately.

Reviewed 10/29/2020
Was this review useful to you? Yes/No
Thank you for your feedback.
Perfect Adapter, Perfect Price.
by L1GM4
Cycling Enthusiast
Atlanta, GA

I needed a 160mm to 203mm brake rotor adapter, as i only had a 160mm to 180mm adapter. This product fits the bill perfectly, and at one of the lowest prices of any adapters on the internet.

Reviewed 7/21/2019
Was this review useful to you? Yes/No
Thank you for your feedback.

Articles will open in new tab.

Comparing bottom bracket types and standards.
You wanna go fast? Join the ceramic revolution!
Make your upgrades count. Here's the equipment that will help you ride your bike faster.
Campagnolo vs. Shimano vs. SRAM: demystifying groupsets.
What to consider when selecting a crankset for your road bike.