Shimano disc brake mounting adapter SM-DBADT - ISMMAF203PPA

Fit a 203 mm disc safely with the genuine Shimano adapter

The Shimano SM-DBADT – ISMMAF203PPA disc brake mounting adapter allows a Post Mount brake caliper to be fitted to a Post Mount bracket so that a 203 mm brake disc can be used . As a genuine Shimano part, it guarantees precise caliper alignment and perfect compatibility with Shimano braking systems and many other Post Mount-standard brakes.

Made from robust aluminium, this adapter ensures excellent rigidity whilst remaining lightweight. It is the ideal solution for increasing the brake disc diameter, thereby improving braking power, heat dissipation and endurance during long descents or demanding mountain biking and e-MTB rides.

Easy to install, the ISMMAF203PPAmodel is designed for Post Mount to Post Mount (+43 mm) set-ups for use with a 203 mm disc, provided the fork or frame is approved for this disc diameter.

Key features

• Shimano genuine adapter.
• Compatible with Post Mount to Post Mount (PM → PM).
• Allows fitting of a 203 mm disc.
• Lightweight and durable aluminium construction.
• Precise alignment of the brake caliper.
• Ideal for improving braking power and endurance.
• Shimano reference: ISMMAF203PPA.

Technical specifications

• Brand: Shimano
• Model: SM-DBADT
• Part number: ISMMAF203PPA
• Type: Disc brake caliper adapter
• Mounting: Post Mount → Post Mount (P/P)
• Disc compatibility: 203 mm
• Height adjustment: +43 mm
• Material: Aluminium
• Colour: Black
• Mounting bolts: Supplied depending on packaging.

FAQ

What is this Shimano adapter used for?

It allows you to reposition the brake caliper so that a 203 mm disccan be fitted to a compatiblePost Mount mount .

Is it compatible with all Shimano brakes?

Yes, it is compatible with most Shimano calipers that use a Post Mountmount , provided that the frame or fork can accommodate a 203 mm disc.

Can it be used on both the front and rear?

Part number ISMMAF203PPA is primarily intended for set-ups requiring a PM to PM +43 mm adapter . It is essential to check compatibility with your frame or fork before installation.

Are the bolts included?

Depending on the packaging ( Shimano), the mounting bolts are usually supplied with the adapter. We recommend checking the exact contents of the packaging before fitting.

Can I fit a 203 mm disc to any bike?

No. The frame and fork must be approved to accommodate a 203 mmdisc . Always check the manufacturer’s recommendations before making this modification.