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⚡ Upgrade your braking game with precision and zero compromises!
The Shimano XTR SM-MA90 adapter is a lightweight, precision-machined caliper mount that converts 180mm post mount forks to fit 203mm brake rotors. Weighing only 45 grams, it offers a perfect, washer-free fit for enhanced braking performance, backed by Shimano’s trusted engineering and a 1-year manufacturer warranty.
| ASIN | B00NLXXPKK |
| Best Sellers Rank | 108,144 in Sports & Outdoors ( See Top 100 in Sports & Outdoors ) 181 in Mounts & Adapters |
| Brand | SHIMANO |
| Colour | Other |
| Customer Reviews | 4.6 out of 5 stars 549 Reviews |
| Global Trade Identification Number | 04524667887430 |
| Included Components | Bike Part |
| Item Dimensions | 20.3 x 10.2 x 2.5 centimetres |
| Item Type Name | Bike Parts |
| Item Weight | 45 Grams |
| Item dimensions L x W x H | 20.3 x 10.2 x 2.5 centimetres |
| Item weight | 45 Grams |
| Manufacturer | Shimano |
| Manufacturer Warranty Description | 1 year manufacturer. |
| Material | Other |
| Model Number | ISMMA90F203PPM |
| Part Number | ISMMA90F203PPM |
| Unit Count | 1.0 count |
| Unit count | 1.0 count |
M**L
Genuine shimano part
Perfect item for the job. Previous 20mm spacer required some additional washers to use with my 23mm rotor, this fits perfectly and does not require any other washers. Genuine shimano part.
T**D
Working
Worked perfectly for me to convert my 180 post mount front calliper to use a 203mm rotor.
N**H
Genuine Shimano spacers for my to upgrade the rotors ro 203mm on my eMTB
Genuine Shimano spacers for my to upgrade the rotors ro 203mm on my eMTB. Very good quality
J**N
Much better than the ones provided with shimano brake kits
The materials used don't corode as fast as the standard mount provided with brake sets.
C**E
Genuine XTR
I had no idea they made XTR versions of the caliper mounts having brought loads of standard mounts. The difference is obvious straight away weight wise. So being a bit of a weight weenie, I'm very happy.
T**H
Great price for a genuine shimano 180->203mm rotor adapter
Genuine Shimano adapter - noticeably light and strong, with bolts and wire fixing (I used a plastic fixing clip, though).
M**R
Exactly right to put 203 rotor on fox 36
Mounting bolts included
J**L
Does not work with a 203mm disc
Says it works with a 203mm disc but it doesn’t. In fact it not much different to my 180mm mount.
P**S
Tadellos
Perfekt Passform!
S**E
Genuine shimano - high quality
Just why I needed to solve a caliper / rotor fit issue.
A**A
Adattatore PM Shimano
Adattatore PM per pinze Shimano. Perfetto. Completo di quello indicato in descrizione. Scegliete la misura e via.
C**N
Adaptateur disque 180 - 203 mm
Parfait pour convertir un disque de 180 en 203 mm. Visserie fournie. Top.
R**A
Good product
Took a while to be delivered but transaction was smooth and item was as described.
Trustpilot
5 days ago
2 weeks ago