Reviews & Ratings
This AliExpress bike upgrade is too powerful...
The reviewer discusses the ZRACE XG4 Flat Mount 4 pistons Caliper extensively throughout the video. They mention purchasing these calipers from AliExpress, noting their excitement about the four-piston design, which is unusual for road bikes. The reviewer highlights the calipers' lightweight CNC construction, flat mount compatibility, and the inclusion of ICE-TECH pads. They compare the design to Hope RX4 calipers but note the significant price difference. The reviewer installs the calipers, tests them extensively, and finds them to offer exceptional braking power and modulation, though they acknowledge the calipers are overkill for most road biking scenarios.
AI-Summary
Pros
- Exceptional braking power
- Improved modulation
- Lightweight CNC construction
- Flat mount compatibility for easy installation on road bikes
- Includes ICE-TECH pads
- Higher ceiling for brake fade resistance
- Good for heavier bike setups like bikepacking
- Better for loose and gravelly surfaces due to improved modulation
- Affordable compared to similar products like Hope RX4
Cons
- Complete overkill for most road biking scenarios
- Slightly softer initial brake pull due to larger piston surface area
- Twice the chance for piston seal failure compared to two-piston calipers
- Phenolic resin pistons may not be as durable as ceramic or aluminum
- Requires more careful bleeding process
Key Points
- Four-piston design
- Flat mount compatible
- ICE-TECH pads included
- Phenolic resin pistons
- Total piston surface area of 804 mm²
- Weighs 109g per caliper
- Uses same pad size as Hope RX4 calipers
- 6% increase in braking force compared to standard two-piston calipers
Where to Buy

AFFILIATE by TraceVeloACTIVE
aliexpress.com🇺🇸
$62.79
🇫🇷
€39.99
🇬🇧
£33.89
Last checked:
19 days
ago

AFFILIATE by MyBikePartsACTIVE
aliexpress.com🇺🇸
$65.94
🇫🇷
€40.19
🇬🇧
£33.89
Rating there:
5.0 (7 reviews)
Last checked:
about 1 month
ago

AFFILIATE by MyBikePartsACTIVE
aliexpress.com🇺🇸
$65.94
Last checked:
25 days
ago
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