Li Auto ONE Big Brake Kit Upgrade / TTSPORT Classic 8703
The Li Auto ONE is one of the more interesting range-extender SUVs on the road — a 1.2T engine backing up an EV drivetrain, 0-100 km/h in 6.5 seconds, and up to 800 km of combined range. Stock brakes bring the roughly 2-ton SUV to a stop in a little over 37 meters from 100 km/h, which is a respectable number for the vehicle's weight class. The complaint from this owner wasn't stopping distance — it was pedal feel. The factory brake response felt soft and non-linear, so the car went in for a TTSPORT TT8703 fluorescent-green six-piston caliper kit.
The upgrade swaps the factory single-piston floating caliper for a TTSPORT TT8703 monobloc six-piston caliper paired with a 405x34mm high-carbon heat-treated drilled rotor and stainless brake lines — all installed behind the car's stock 20-inch wheels with no spacers.
Vehicle & Kit Specs
| Item | Specification |
|---|---|
| Vehicle | Li Auto ONE, factory 20-inch wheels, direct fit with no spacers required |
| Front caliper | TTSPORT TT8703 monobloc six-piston caliper, one-piece cast aluminum alloy, fluorescent green finish, sealed piston dust boots |
| Front rotor | TTSPORT 405x34mm high-carbon heat-treated drilled rotor |
| Lines | TTSPORT stainless steel brake lines |
Why It Works
A soft, inconsistent pedal usually traces back to caliper flex — the factory single-piston floating caliper deforms slightly under hard braking, which robs the pedal of the direct, linear feel drivers notice most. The TT8703's one-piece cast aluminum-alloy body resists that flex, so pedal input translates more predictably to clamping force, even in extreme conditions like sand or off-road use where this owner's community often drives.
- Monobloc caliper construction reduces flex versus the OEM floating unit for a firmer, more linear pedal
- The larger 405x34mm rotor adds thermal mass, giving the roughly 2-ton SUV more margin against fade under repeated hard stops
- Sized to clear the stock 20-inch wheel with no spacers — no offset changes, no fitment compromises
- Sealed dust boots on the pistons cut down on maintenance, a detail well suited to owners who take the vehicle off-road
Installation Gallery
Does the TTSPORT TT8703 kit fit under the Li Auto ONE's factory 20-inch wheels?
What does the TT8703 big brake kit for the Li Auto ONE include?
What is the TT8703 caliper made from?
Need fitment confirmation? Choose the closest TTSPORT series or send your vehicle, wheel size, and intended use before ordering.