Hyundai i20N Big Brake Kit Upgrade / TTSPORT Racing TR40

The Hyundai i20N is a small car with a lot of ambition — light, tossable, and tuned with genuine WRC-derived chassis knowledge. But owners in Europe and Australia have reported the same complaint: the stock brakes can't keep up with the chassis, especially on long descents or back-to-back hard stops, where fade shows up quickly. For an Australian i20N owner running mountain roads and track days in hot weather, that meant the brakes — not the engine or suspension — became the first real upgrade priority.

After comparing options and reading feedback from other i20N owners, this build landed on the TTSPORT TR40 — a forged monobloc four-piston caliper paired with a 330mm racing rotor. It's the same caliper platform TTSPORT runs in CTCC, China's top touring car series, brought down to street-and-track duty on a hot hatch.

Vehicle & Kit Specs

Here's the hardware breakdown for this front-axle upgrade, fitted behind the i20N's factory 17-inch wheels.

Below is TTSPORT's official spec sheet for the TR40 caliper used in this build.

Why It Works

The TR40 isn't a caliper designed to look aggressive behind a wheel — its engineering traces back to CTCC racing, where calipers face repeated hard stops, sustained high temperatures, and constant demand for a consistent, predictable pedal. That development environment shapes every part of the design.

Monobloc Forging + 5-Axis CNC

The caliper body starts as a single forged piece, which keeps the metal's grain structure dense and avoids the weak points that welded calipers can develop. It's then machined on a 5-axis CNC for roughly 12 hours, with every surface, rib, and fluid passage cut to tight tolerance, followed by stress-relief treatment and plating. The result is a body that resists flex and holds its shape under repeated hard braking — the foundation of a firm pedal.

Internal Fluid Passages + Differential-Bore Pistons

TTSPORT runs the same internal-passage layout on its CTCC race calipers. Routing fluid inside the caliper body shortens its path and shields it from outside heat, which keeps response quicker and more consistent. The differential piston bores (36mm and 41.3mm pairs) even out clamping pressure across the pad, reducing uneven pad wear and giving a more linear bite from initial contact through hard braking.

Reinforcement Ribbing Resists Flex

The ribbed geometry across the caliper body isn't just visual — it raises resistance to twisting and deformation under sustained clamping load. A caliper that doesn't flex means less pedal travel is lost to the hardware itself, which translates to a more direct pedal, shorter stopping distances, and a pedal that stays firm on a long downhill or lap after lap on track.

• Multi-channel vented rotor design increases airflow to manage the heat buildup that causes fade during extended hard braking.
• An external quick-release pin and quick-swap pad design let owners change pad compounds in minutes for street, track, or full-race use.
• The lightweight coral-vane rotor design balances cooling capacity with reduced unsprung weight, keeping friction and pedal feel consistent under repeated stops.

The 330mm rotor also leaves room to grow: TTSPORT offers a racing steel rotor for owners doing extended track days, and a carbon-ceramic option for those chasing further weight savings and heat capacity as the build evolves.

Installation Gallery

FAQ