Volvo XC60 Big Brake Kit Upgrade / TTSPORT Classic 8703
This Volvo XC60 has plenty of engine on tap for city driving and even holds up well pushing through mountain roads — but the stock brakes were the weak link. The owner described the pedal going hard and unresponsive under hard use at speed, with the car feeling like it wouldn't slow down predictably. The fix: a TTSPORT TT8703 monobloc six-piston big brake kit paired with 380x34mm drilled rotors, running under the car's factory 20-inch wheels.
The owner is an XC60 driver himself and put it plainly: the factory brakes were fine around town, but on aggressive mountain-road driving the pedal firmed up without matching stopping power, and 100-0 braking felt slower to react than it should. A big brake kit was the logical next step for anyone actually using the car's chassis.
TTSPORT's TT8703 is a monobloc-cast aluminum caliper — one piece rather than bolted halves — built to keep clamping force consistent instead of flexing under hard braking. It also ships with dust boots on the pistons, which cuts down on the seal maintenance that open-piston big calipers usually require. TTSPORT lists it as suited to vehicles running 18-inch wheels and up, which lined up with this XC60's factory 20-inch setup with no spacers needed.
Vehicle & Kit Specs
| Item | Specification |
|---|---|
| Vehicle | Volvo XC60, 20-inch factory wheels |
| Front caliper | TTSPORT TT8703 monobloc six-piston caliper with dust boots |
| Front rotor | 380x34mm high-carbon, heat-treated, drilled rotor |
| Lines | TTSPORT stainless steel brake lines |
Why It Works
- A monobloc-cast caliper body resists the flex a two-piece or stock caliper can develop under hard, repeated braking, so pedal input translates more directly into clamping force.
- Stepping up to a 380x34mm rotor adds mass and surface area over the factory disc, giving the system more thermal capacity to shed heat on long descents or repeated hard stops.
- Stainless steel lines resist the ballooning that rubber hoses experience under pressure, which keeps pedal feel firmer and more consistent from the first stop to the last.
- Built for 18-inch-and-up wheels, the TT8703 tucks behind this XC60's 20-inch wheels without needing spacers.
The owner reported the difference directly: braking response is immediate at speed, 100-0 performance improved noticeably, and the margin versus the stock setup was significant. As someone who does a lot of driving on rough, unpredictable roads, having brakes that respond consistently mattered more than any spec sheet number.
Installation Gallery
FAQ
What wheel size does the TT8703 kit fit under on the Volvo XC60?
What does the TT8703 kit include?
Does the TT8703 caliper need extra maintenance?
Need fitment confirmation? Choose the closest TTSPORT series or send your vehicle, wheel size, and intended use before ordering.