Shimano SMMA90F203PPM - Bicycle Parts, 203mm P/PM

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!

As described

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.

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.

Used on my Rockshox Revelation 180 mount to use with a 203 rotor. Worked great!!

Now I’m running 203mm shimano rotors just fine! It is awesome!

Works fine but it came with 4mm hex bolts instead of the 5mm bolts so taking off 2 star's. Makes me think it’s not a genuine shimano part. It’s annoy to have to change tools working on the front and rear brakes.

This is the one front or Rear 180 to 203.

Perfekt Passform!

Adattatore PM per pinze Shimano. Perfetto. Completo di quello indicato in descrizione. Scegliete la misura e via.

Parfait pour convertir un disque de 180 en 203 mm. Visserie fournie. Top.

Took a while to be delivered but transaction was smooth and item was as described.

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!