Honda Fit/Jazz (GK5) Big Brake Kit Upgrade / TTSPORT Direct-Mount Series
Search "brake upgrade" for a Honda Fit and you'll get flooded with generic advice that doesn't account for how the GK5's factory brakes actually behave. The stock setup runs a single-piston front caliper — fine for daily driving, but it runs out of bite the moment you start pushing the car. This case looks at a straightforward front-axle upgrade using a TTSPORT kit built specifically for the GK5, still running the car's factory 15-inch wheels.
The owner kept the wheel size stock at 15 inches, so fitment behind the factory wheel was a hard requirement — not an afterthought. TTSPORT's GK5-specific kit was built around exactly that constraint.
Vehicle & Kit Specs
Here's the hardware breakdown for this front-axle build:
| Item | Specification |
|---|---|
| Vehicle | Honda Fit (GK5), front-axle upgrade, fits factory 15-inch wheels |
| Front caliper | TTSPORT four-piston fixed caliper (front) |
| Front rotor | 260mm x 20mm one-piece brake rotor |
| Bracket | Vehicle-specific caliper bracket engineered from GK5 hub/knuckle data |
| Hardware | Mounting bolts and hardware developed and fitted specifically for the GK5 platform |
Why It Works
Going from a single-piston caliper to a four-piston fixed caliper changes how the brake pad clamps the rotor. More pistons spread clamping force more evenly across the pad, which gives a more linear pedal — less on/off grabbiness, more predictable modulation as you push harder into the pedal.
- Four-piston caliper clamps more evenly than the factory single-piston unit, improving pedal linearity.
- The 260x20mm one-piece rotor runs stable with no vibration under braking.
- Bracket and hardware are engineered from GK5 OEM data, so the kit fits behind the car's factory 15-inch wheels.
None of this turns a Fit into something it isn't — it just closes the gap between what the chassis is capable of and what the factory single-piston brake can actually deliver.
Installation Gallery
FAQ
What size wheels does this GK5 big brake kit fit under?
What caliper and rotor does the kit use?
Is the kit specific to the GK5 chassis?
Need fitment confirmation? Choose the closest TTSPORT series or send your vehicle, wheel size, and intended use before ordering.