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⚡ Upgrade your ride with precision and power — don’t get left behind!
The Shimano SM-MA90F203PPM is a lightweight, stainless steel caliper mounting adapter engineered for post-type forks with 180mm mounts to accommodate 203mm brake rotors. Manufactured to Shimano’s XTR-level standards, it ensures precise brake alignment and reliable performance, making it a must-have upgrade for serious cyclists seeking enhanced stopping power and durability.
| ASIN | B00NLXXPKK |
| Best Sellers Rank | #77,084 in Sports & Outdoors ( See Top 100 in Sports & Outdoors ) #13 in Bike Brake Mounts & Adapters |
| Brand Name | SHIMANO |
| Compatible with Vehicle Type | Bicycle |
| Customer Reviews | 4.6 4.6 out of 5 stars (541) |
| Exterior Finish | Stainless Steel |
| Global Trade Identification Number | 04524667887430 |
| Included Components | Bike Part |
| Item Diameter | 180 Millimeters |
| Item Type Name | Bike Parts |
| Item Weight | 1.6 ounces |
| Manufacturer | Shimano |
| Manufacturer Part Number | ISMMA90F203PPM |
| Material Type | Other |
| Model Number | SMMA90F203PPM |
| Unit Count | 1.0 Count |
I**N
Worked temporarily on SRAM
Had a spare set of these that I used on a new build which used SRAM brakes. It set them about 95% of the way, which was expected. Just wish all these manufacturers would agree on standard sizing here instead of being a few mm off.
S**E
Genuine shimano - high quality
Just why I needed to solve a caliper / rotor fit issue.
E**Y
great fit
fit perfectly, great price
J**W
Only for 180mm posts, not 160mm
This is a fine adapter, but it didn't work for my 203mm rotors. My DVO fork has posts for 160mm rotors and needs a 44mm adapter to run 203mm rotors. This Shimano adapter is only about 20mm and doesn't reach far enough. It is made for adapting 180mm to 203mm, not 160mm to 203mm. I wish the product description and/or the part number would indicate what posts this adapter is made for, but only the instruction manual makes that distinction. Shimano's SMMAF203PP (without the "90") adapter uses the same instruction manual which specifies 180mm. It can be hard for find the correct brake mounting adapter, so Amazon sellers and manufacturers need to step it up by providing the necessary technical details. Otherwise this Shimano adapter is great and includes drilled bolts and metal wire so you can mount the calipers race-style. Although it doesn't say, it looks like this "90" adapter is XTR/Dura-Ace series.
M**.
As described
As described
J**N
Accurate and correct
Product is as described. Arrived in genuine Shimano packaging. Both my fork and frame are spec'd for 180mm post mount and I run Shimano m7100 brakes with 203mm rotors, so a pair worked perfectly. I originally tried buying some "Amazon's Choice" cheapies that I found doing a search for "180-203mm shimano post mount adapter" but they didnt match, so don't waste your time and money doing that! Ride on!
L**N
Just what I needed
Used on my Rockshox Revelation 180 mount to use with a 203 rotor. Worked great!!
E**E
Fox factory 36 160mm
Now I’m running 203mm shimano rotors just fine! It is awesome!
P**S
Perfekt Passform!
A**A
Adattatore PM per pinze Shimano. Perfetto. Completo di quello indicato in descrizione. Scegliete la misura e via.
C**N
Parfait pour convertir un disque de 180 en 203 mm. Visserie fournie. Top.
R**A
Took a while to be delivered but transaction was smooth and item was as described.
A**Z
Este adaptador lo he usado para colocar discos de freno de 203mm en una suspención FOX Factory 36 2021. No necesitas espaciadores ni nada, solo lo colocas y ya esta listo para el disco de 203mm. Viene con sus tornillos y rondanas. Prové algunos otros de menor calidad y fue una perdida de tiempo, este es el bueno!
Trustpilot
4 days ago
3 weeks ago