Zinc Rudder Anode 1-7/8" CMT-R01
Free returns on all eligible orders
You have 30 days to request a return. All sale items are final sale.
The CMT-R01 is a 1-7/8" round zinc rudder anode designed to protect rudders and trim tabs from galvanic corrosion. This two-piece “pancake” style anode clamps around the rudder or tab, sacrificing itself to prevent damage to critical underwater metals.
Manufactured from marine-grade zinc alloy, it is specifically engineered for saltwater environments, providing reliable and predictable corrosion protection.
Key Features
- 1-7/8" diameter rudder/trim tab anode
- Two-piece clamshell (“button”) design
- Marine-grade zinc alloy construction
- Includes stainless steel mounting hardware
- Designed for saltwater use only
- Direct OEM-style replacement
Application / Compatibility
Designed for:
- Rudders
- Trim tabs
- Small underwater hardware requiring compact protection
✔ Common on:
- Inboard vessels
- Sailboats
- Smaller rudder systems
✔ Also used where space is limited and a low-profile anode is required
Serial Number / Fitment Notice
Always confirm:
- Diameter (1-7/8")
- Mounting style (through-bolt clamp design)
- Clearance on rudder or trim tab
Correct sizing ensures proper clamping and effective corrosion protection.
When This Part Needs Replacement
- Anode is 50% or more consumed
- Uneven or rapid corrosion
- Loose fit or hardware degradation
- Routine haul-out or dive inspection
Installation Notes
- Clamp both halves securely around rudder/tab
- Ensure clean metal-to-metal contact
- Do not paint the anode
- Use supplied stainless hardware
- Can be replaced underwater if accessible
Alternate / Cross-Reference Part Numbers
- Camp Company: CMT-R01
- Martyr: CMR01 / R01 / R-1
- Common references: R1, CMR1, R1875Z
- Aluminum version: CMT-R01AL
- Magnesium version available for freshwater
Parts Desk Insight
These small rudder anodes are deceptively important—they protect high-value steering components in a very concentrated area. If they disappear, corrosion goes straight into your rudder hardware fast.
Shipping
Shipping: Ships same or next day for fast Canada wide shipping. ⚓
Shipping information
In-stock and OEM parts: ship same or next business day.
Locally warehoused items: ship within 3–4 business days.
Special-order items: timeline confirmed after order.
Returns & warranty
Returns & Satisfaction Guarantee
We stand firmly behind the quality of every product we sell. Your confidence matters to us — and we back it with a straightforward 30-Day Satisfaction Guarantee.
If you are not fully satisfied, you may request a return within 30 days of delivery. All returns must receive pre-approval prior to being sent back. Unauthorized returns will not be accepted.
To qualify for a return:
Item must be in new, unused condition
Product must be in its original packaging
All parts, components, hardware, manuals, and accessories must be included
Packaging must be undamaged and suitable for resale
Important:
Electronics are strictly inspected. No returns on open-box electronics. Exceptions may apply only with prior written approval. Any electronic unit that has been installed, powered, activated, or altered may not be eligible for return.
We are serious about product integrity — and equally serious about taking care of our customers. If there is ever a product issue, contact us immediately so we can make it right.
For return authorization, please contact our support team before shipping anything back.