Honda Fit/Jazz (GK5) Big Brake Kit Upgrade / TTSPORT Direct-Mount Rear Drum-to-Disc Kit

Rear drum brakes on a car people actually drive hard have a well-known weak spot: heat soak and fade under repeated stops, plus a pedal that never feels as linear as a disc setup. This Honda Fit GK5, riding on its stock 15-inch wheels, got the drums pulled in favor of a TTSPORT rear disc conversion — a single-piston caliper and a 260x9mm one-piece rotor in place of the factory drum hardware.

The swap keeps the factory 15-inch wheels in play — no spacers, no wheel change — while giving the rear axle an actual disc-and-caliper setup instead of a drum-and-shoe arrangement.

Vehicle & Kit Specs

Here's the hardware breakdown for this build.

Why It Works

Drums rely on shoes expanding against the inside of a drum — a design that traps heat and gives a pedal that's harder to modulate precisely. Swapping to a disc-and-caliper layout changes the geometry entirely: the pad clamps the rotor's open face, so heat dissipates rather than building up inside a closed housing, and the caliper's clamping force translates into a more linear, predictable pedal.

For a car as light as the Fit, a well-matched single-piston caliper is enough to make a real difference — the source notes it delivers noticeably better stopping performance and more linear response than the stock setup. The 260x9mm one-piece rotor design also helps here: a solid single-piece disc runs true and resists the wobble or vibration that can creep in on lower-quality rotors, which matters for consistent pedal feel every time you brake.

• Disc-and-caliper design sheds heat better than an enclosed drum
• 260x9mm one-piece rotor runs stable without vibration
• Fits behind the stock 15-inch wheel, no spacers required

Installation Gallery

FAQ