Toyota GT86 Brake Discs: Specs, Fitment & Wear Symptoms

On the GT86, a genuinely useful myth worth correcting: discs don't actually "warp" — the real cause is pad material depositing unevenly.

Illustration for editorial purposes

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OEM Part Number: SU00300638

Genuinely worth knowing: owners have directly reported confusion between 277mm and 293-294mm front discs for the same-looking car — a specialist Toyota/Subaru parts retailer confirms 294mm fits all GT86 variants except the Performance Pack (Brembo brakes) and a small number of early 2016 Primo models, which use 277mm front and 286mm rear.

Standard trims (most of the range), front discs	294mm diameter, vented, 24mm thickness, 22mm minimum
Early 2016 Primo models only, front discs	277mm diameter, vented, 24mm thickness, 22mm minimum — genuinely different, confirm your exact build before ordering
Rear discs, standard trims	290mm diameter, solid, 18mm thickness — genuine cross-reference shared with Subaru BRZ: SU00300638, SU00310629
Performance Pack (Brembo brakes)	326mm front, vented — a genuinely much larger specification, not compatible with standard calipers

A Genuinely Useful Myth Worth Correcting: Discs Don't Actually "Warp" — Toyota GT86 Brake Discs

If you're feeling a pulsing sensation through the brake pedal and have been told the discs have "warped," this is genuinely worth understanding: discs don't actually physically warp or bend. What's really happening is that pad material transfers unevenly onto the disc surface, creating slightly higher and lower points around the circumference — this is what you feel as pulsing. A common cause worth knowing: holding the brake pedal down while stationary immediately after hard braking, rather than releasing it once stopped, keeps heat concentrated in one spot and encourages exactly this kind of uneven deposit.

A genuinely counterintuitive fact worth knowing if your car is a hybrid: regenerative braking typically means the rear brakes see considerably less use than you'd expect, since the electric motor handles much of the everyday deceleration. This can mean rear discs corrode more than the fronts — the opposite pattern to what most owners expect based on conventional cars.

It's also worth knowing that a car left standing overnight with heavily corroded discs can occasionally feel genuinely stuck when trying to pull away — a firm, deliberate application of the accelerator followed by a couple of firm brake applications once moving typically clears this within a few hundred metres.

Toyota GT86 Brake Discs: The Part That Pads Depend On

On the Toyota GT86, discs and pads don't wear independently — neglect one and the other degrades faster too, which is exactly why what starts as a routine pad change frequently turns into a disc replacement as well.

Before you buy: disc size and design vary by trim, engine size and whether your car has the standard or "sport" brake package. Always confirm against your VIN before ordering.

Toyota GT86 Brake Discs: What They Do

Brake discs provide the surface the brake pads clamp against to slow the car, converting momentum into heat through friction. Larger, sportier trims of the GT86 typically use bigger discs than standard versions to handle the additional heat generated by more aggressive braking.

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Toyota GT86 Brake Discs: Wear Symptoms, DIY Difficulty & Aftermarket Advice

These are the same regardless of make or model — see our full Brake Discs Guide for warning signs to watch for, confirming fitment against your VIN, and choosing a reliable aftermarket disc.

More Toyota Brake Discs

The same part, covered across other Toyota models.