HEL Advocate 4-Piston Hydraulic Disc Brake System - Stealth Black & Vapour Grey
- For Downhill, Enduro, and e-MTB
- Dependable & Consistent Stopping Power
- Firm Lever Feel with Rapid Feedback
- Consistent, Predictable Modulation
- Free-Flow 2-Piece Caliper Design
- Robust, Durable, and Built to Last
- Lightweight Billet Aluminium - Not Cast
- HEL Braided Hose Included as Standard
- DOT 5.1 Brake Fluid Only
- Entirely Manufactured in Devon, England
- Built by Riders, Backed by Motorsport Heritage
- Warranty & Crash Replacement Scheme
Product information
Here, you’ll find everything you need to get the most out of your brake system. Explore our helpful video library for step-by-step how-to guides and installation procedures, or dive into our detailed exploded diagrams to see every part of your product broken down. Whether you're installing, troubleshooting, or upgrading, we've got you covered and we're here to help.
For diagrams, guides and documents: Diagrams & Documents
For video guides and how-to's: Video Library
If you're unsure of anything, please reach out to us and say Hello! We're more than happy to chat and answer your questions. We really do ride the products we make, so we can help the best we can.
Our live chat is online between 9:00am-4:30pm (UK time) Monday-Friday, or head to our contact page to send us an email. If you'd prefer to send us a message us on Instagram, head over to our page and give us a follow while you're at it! @hel.mtb
WHAT'S INCLUDED?
COMPLETE BRAKE SYSTEM:
2x Axial Master Cylinders/Levers
2x Free-Flow Brake Calipers
2x Ceramic Brake Pads (Sets)
1x Braided Hose & Fitting Kit
1x Billet Bleed Block
4x Titanium Caliper Mounting Bolts
1x Installation Manual + Warranty Card
RESPONSE
HEL's unique spring assembly provides rapid lever response and direct feedback when you need it most.
REGULATE
HEL's free-flow caliper delivers even piston pressure, effectively regulates heat, and prevents brake fade.
RESILIENCE
HEL’s castellated stainless steel piston design reduces pad surface contact and limits heat transfer into the brake fluid.
SPECIFICATIONS
No secrets, only specs. Knowing your brakes is just as important as riding them.
MASTER CYLINDER / LEVER
Type: Axial
Piston Size: 10mm ⌀
Piston Material: Stainless Steel
Lever Adjustment: Tool-Free, 20-Point Click
Lever Span: 35mm (Min. - Max.)
Bleed Port: M5 x 0.8mm
Fluid Compatibility: DOT 5.1 Only
Weight (Excl. Hose): 155g
Finish: Hard Anodised
Material (Main): 6082-T6 Billet Aluminium
Material (Other): Stainless Steel
CALIPER
Fluid Design: Free-Flow
Piston Quantity: 4
Piston Diameter: 2x 17mm ⌀ & 2x 15mm ⌀
Piston Design: Solid, Castellated Top
Piston Material: Stainless Steel
Pad Compatibility: HEL Advocate / Shimano Saint, XT, XTR / Galfer FD426 /
TRP DHR EVO
Rotor Compatibility Diameter: 180mm / 203mm / 220mm
Rotor Compatibility Thickness: 1.8mm / 2.0mm / 2.3mm
PM Adapter Compatibility: HEL Advocate / Universal
Bleed Port: M5 x 0.8mm
Fluid Compatibility: DOT 5.1 Only
Weight (Excl. Pads & Hose): 105g
Finish: Hard Anodised
Material (Main): 6082-T6 Billet Aluminium
Material (Other): Stainless Steel
HOSE + FITTING KIT
Construction: 3-Layer Braided Stainless Steel
External Diameter: 5.0mm / 0.19" ⌀
Frame Compatibility: Internal & External Routing*
Internal Material (Core): PTFE
External Material (Overbraid): Stainless Steel 304
External Material (Outer): PVC (Transparent or Coloured)
Colour Options: Various
Hose Fitting Solution: 2-Piece
Hose Fitting Compatibility: HEL Advocate
Hose Fitting Material: Stainless Steel
Supplied Hose Length: 2.7 metres (Uncut)
TOOLS REQUIRED
To install, bleed, and dial in your HEL Advocate brakes, you'll need:
Caliper Bleed Block (Supplied)
Allen Key: 2.5mm / 3mm / 4mm / 5mm
Open-End Spanner: 8mm (2)
Hose Cutter or Side-Cutting Plier
Hand Pick/Poking Tool
Nitrile or Latex Gloves
Wiping Cloths/Blue Roll
Isopropyl Alcohol (Recommended) or Disc Brake Cleaner
Brake Bleed Kit: M5 x 0.8mm (Recommended: SRAM Pro Bleed Kit or Park Tool BKD-1.2)
The HEL Advocate brake system represents two years of relentless dedication to design, engineering, and testing. Every step of the process has been brought from concept to reality in-house by our small and determined team who have designed, prototyped, CNC machined, hand-assembled and rigorously tested in the lab, on the trail, and in real race environments. The result is a system that proudly encapsulates HEL’s 25 years of motorsport heritage.
Purpose-built to meet the demands of downhill, enduro, and eMTB riding, the Advocate is HEL Mountain Bike’s most capable, robust, highest-performing brake system to date.
For trail and XC bikes, HEL is currently developing the Raiser — an ultra-lightweight, 2-piston brake system specifically designed for riders who demand maximum 2-piston stopping power and a compact footprint, when every gram counts.
Your bike, your style. If the standard HEL colour combos don’t match your vision, you can mix and match from 7 unique colours to customise your own brakes - at no extra cost.
PAIRED FOR SUCCESS
We supply the same rotors, pads, and even tools that we use on the trail - making things easier for you and completing the package!
