Lewis
Lewis LH4 Quad 4 Pistons Brake for Enduro & Downhill | Axial Cyclinder Titanium Piston Titanium Screw Bolt | Free Worldwide Shipping
Lewis LH4 Quad 4 Pistons Brake for Enduro & Downhill | Axial Cyclinder Titanium Piston Titanium Screw Bolt | Free Worldwide Shipping
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Lewis LH4 Brake System – Precision Power for Downhill & Enduro
Strongest Braking Power, Lightweight Design, Unmatched Control
The Lewis LH4 Brake System is built for riders who demand absolute confidence in the most aggressive terrain. Designed for Enduro and Downhill use, it combines powerful 4-piston performance, CNC machined 7075-T6 aluminum construction, and Lewis’s signature 2-in-1 lever adjustment system for reach and bite point.
Whether you’re attacking steep descents or technical switchbacks, the LH4 delivers a perfect balance of raw stopping power and precise modulation.
Key Features
4-Piston Power System (2×14 mm + 2×17 mm)
The asymmetric piston setup ensures smooth, linear modulation in the initial stroke and progressive power at full engagement — giving you confidence and control on every descent.
7075-T6 CNC Machined Construction
Each LH4 set is crafted from aerospace-grade 7075-T6 aluminum using 5-axis CNC machining for maximum stiffness and minimum weight. The result is exceptional precision and durability under extreme conditions.
Patented 2-in-1 Dual Adjustment System
Customize your lever feel with Lewis’s dual adjustment mechanism for both Reach and Bite Point — fine-tuning brake response to match your riding style and terrain.
Ultra-Lightweight with Strong Braking Force
With a total weight of just 433 g (per front and rear set, without hoses), the LH4 offers race-level performance in a lightweight package for riders who demand speed and efficiency.
Braided Kevlar Oil Hose
Premium braided black hoses resist expansion and heat build-up for consistent lever feel and reliable braking under prolonged use.
Customization Color Options
Available in multiple color finishes — black, silver, titanium, rainbow, purple and more — for a personalized and unique setup.
Technical Specifications
| Component | Specification |
|---|---|
| Master Cylinder | Axial Type |
| Material | 7075-T6 Aluminum |
| Machining Process | 5-Axis CNC |
| Piston Size | 4 Pistons (2×14 mm + 2×17 mm) |
| Pad Type | Metallic |
| Fluid Type | Mineral Oil |
| Hose Type | Braided Kevlar (Black) |
| Hose Length | 90 cm / 165 cm |
| Lever Weight | 98 g |
| Caliper Weight | 121.5 g |
| Clamp Type | Split Design |
| Color Options | Customizable Anodized Colors |
Performance Highlights
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Designed for Downhill & Enduro — stable stopping power on steep descents
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High heat resistance with consistent braking feedback
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Lightweight yet rigid construction for precision riders
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Ideal for mountain, e-MTB, and technical trail applications
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Smooth lever feel + predictable power delivery across all conditions
Tagline Suggestion
Lewis LH4 — Engineered for Downhill Power and Precision Control.
User Manual
User Manual
Warranty Information
Warranty Information
EXS provides a 24-month warranty on this product from the date of original purchase (excluding water bottles and bar tape). This warranty covers defects in materials or workmanship, as well as structural damage resulting from riding incidents. Should a covered issue arise, EXS will repair or replace the product at no charge.
The customer is responsible for shipping the product to EXS for evaluation, or for the cost of shipping replacement handlebars after a warranty claim is approved. The customer is also responsible for any duties and/or taxes that may be charged.
This warranty may be applied only once per EXS product.
Pro Tip: Every EXS carbon product has a unique QR code. Please take a clear photo of it — you’ll need it if you ever need to file a claim.
R-Series & Aerover Handlebars :
Structural damage caused by crashes or falls during riding is eligible for repair or replacement.
However, the warranty does not cover damage resulting from modification, improper installation, misuse, melting, paint damage, or blatant abuse.
Please note:
No time-trial extensions or unauthorised add-ons may be installed on R150, R180, R175, or Aerover handlebars.
The spacer kit for the Aerover series (including carbon top cap, bolt, bearing dust cover, steerer filler, height spacers, and wire spacer) are not covered under warranty.
Returns & Refund Information
Returns & Refund Information
We want you to be fully satisfied with your purchase. However, please note that returns and refunds are only accepted for genuine product quality issues, such as cracks or structural breaks.
Issues such as creaking or noise are generally the result of improper installation and are not considered product defects.
Not Eligible for Return or Refund
Returns will not be accepted under the following conditions:
- Improper installation or use
- Normal wear, surface marks, or cosmetic blemishes
- Damage caused by misuse, over-torque, or accidents
- Any modification or alteration of the product
- Products showing signs of use (including clamp or installation marks)
Returns Due to Wrong Model Ordered
If the incorrect model was ordered by you:
- You are responsible for all return shipping costs.
- Once we've received your return, we will refund you the purchase amount less:
- a) Payment gateway fee of 7% (this is what our credit card company charges us)
- b) Shipping costs, even if you received "free shipping", as we subsidise shipping at our own expense.
Additional Notes
- Returned items must be in unused, original condition and complete with all packaging.
- Products showing any signs of installation or use will not be eligible for return.
- If reshipping is required, the reshipping fee will be borne by the buyer.
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i ordered it the wrong way i ordered the right rear instead of right front so i had to take it off and take out the brake line then put it on the right lever but it works very well