Rod-end bores
3/8″ or 1/2″ bore with steel, nylon, bronze or PTFE race.
Browse bore-end LCRs →Complete Adjustable Suspension & Steering Links — Built to Length
Linkage Rods &
Adjustable Connecting Rods
Choose from 352 standard SYZ linkage rods (4.25″–37.5″, 3/8-24 and 1/2-20 RH/LH) or have one built to your drawing. A linkage rod transmits push-pull motion between two pivots through a rod end, clevis, stud or ball joint.
352 standard
LCR shelf
4.25″–37.50″
Standard lengths
3/8-24 · 1/2-20
RH/LH threads
4 end types
4 race options
ISO 9001:2015 Certified
Factory Direct Sourcing
352 standard sizes
30-day planning window
OEM-Grade Tolerances
Design Concept
What Is a Linkage Rod?
A linkage rod (suspension link, adjustable link, threaded rod assembly) connects two pivot points while allowing precise length adjustment.
A typical SYZ linkage rod includes: tubing cut to length, two tube adapters welded into the tube ends (one RH, one LH thread), two rod ends threaded into the adapters, and two jam nuts to lock the setting in place.
The Turnbuckle Effect: The opposing thread directions (RH on one side, LH on the other) allow you to lengthen or shorten the assembly simply by rotating the central tube. This makes alignment tuning (caster, camber, toe) possible without disconnecting either pivot end from the vehicle.
Standard Shelf
352 Standard Linkage Connecting Rods
The LCR family covers 4.25″–37.50″ lengths, 3/8-24 and 1/2-20 RH/LH threads, four end types and four race options. Use the full category for the current SKU set, or send a drawing for a custom tube link.
Filter 352 Standard Sizes →
Stud ends
Rod-end stud threads for compact threaded interfaces.
Browse stud-end LCRs →
Pin-hole ends
Pinned ends for clevis-style single-axis linkage.
Browse pin-hole LCRs →
Clevis + spring pin
Clevis ends supplied with spring-pin hardware where specified.
Browse clevis LCRs →| Selection point | Standard LCR range | When to request custom |
|---|---|---|
| Length | 4.25″–37.50″ | Non-standard center-to-center or adjustment travel |
| Thread | 3/8-24 or 1/2-20, RH/LH combinations | Metric, special pitch or non-standard hand pair |
| Race | Steel, nylon, bronze or PTFE | Different lubrication, sealing or environment requirement |
Custom Path
Custom Tube Links When the Standard Shelf Is Not Enough
Send center-to-center length, thread and end type — or send a sample. We configure cut tube, RH/LH adapters, rod ends, clevises, ball joints and jam nuts as a complete BOM.
Standard LCR
Use the 352-size shelf when the length, thread and end geometry already match.
Filter standard sizes →Custom tube link
Choose DOM or 4130 tube, round or hex body, end-fitting geometry and adjustment travel.
Configure a custom link →Component-only
Source rod ends, clevises, ball joints, jam nuts, turnbuckles or tube adapters separately.
Select components →Order details: center-to-center length, adjustment range, tube OD and wall, end type, bore or pin size, thread hand pairing, required misalignment and expected load.
Applications
Where Linkage Rods Perform
Configured for off-road suspension, racing control links, and industrial cylinders.
Off-Road Links
Tie rods, control arms, sway bar links, and panhard track bars — standard picks use 4130 chromoly tubing with JMX rod ends; step up to a custom chromoly or DOM tube link when the standard LCR geometry doesn’t fit.
Motorsports & Control Linkage
Weight-optimized pushrods, steering tie-rods, and 4-link systems built from aluminum or thin-wall chromoly, plus compact stud-end throttle and shift linkage for short control runs with serviceable adjustment.
Agricultural Machinery
Heavy-duty implement linkage rods, loader arms, and adjustment links built from thick DOM tubing and economy JM series — or standard LCR lengths where RH/LH adjustment simplifies setup.
Industrial Actuators
Pneumatic and hydraulic cylinder rod extension linkages, sorting conveyors, packaging and motion-transfer assemblies, and mechanical levers built to custom lengths.
FAQ
Common Questions
What’s included in a complete linkage rod assembly?
A complete assembly includes structural tubing cut to size, two weld-in tube adapters (one right-hand, one left-hand thread), two matching rod ends (your choice of series and liner), and two matching jam nuts.
How do I measure center-to-center length?
Measure from the center of one rod end bore to the center of the other with the assembly adjusted to its nominal, mid-adjustment position. For custom setups, measure between the centers of your mounting brackets.
Why use RH + LH opposing threads?
This creates a turnbuckle effect. You can lengthen or shorten the linkage simply by spinning the central tube in one direction or the other, allowing toe, alignment, or preload tuning without taking the assembly off the vehicle.
What tubing should I use for off-road suspension?
We recommend 4130 chromoly tubing with a substantial wall thickness (such as 0.120″ or 0.188″) to resist bending and impact under severe off-road conditions. For lighter links or street vehicles, DOM tubing is a cost-effective alternative.
Can SYZ build linkage rods to my specs?
Yes, we build custom linkage assemblies to your exact drawing, center-to-center length specifications, tubing size, rod end series, and desired plating finishes.
Do you have standard linkage rods in stock sizes?+
Yes. The LCR family has 352 standard sizes covering 4.25″–37.50″ lengths. Use the category shelf to filter the current products, or send a drawing when your geometry falls outside the standard range.
What race options are available on linkage rod ends?+
The standard LCR range includes steel, nylon, bronze and PTFE race options. Choose by load, lubrication, contamination and maintenance requirements.
What is included in a complete linkage rod assembly?
Tubing cut to length, two welded tube adapters (one right-hand, one left-hand thread), two rod ends of your series and material, and two jam nuts. Specify center-to-center length, rod end type and tubing material.
Why use right-hand plus left-hand opposing threads?
They create a turnbuckle effect, so rotating the tube lengthens or shortens the assembly while both rod ends stay connected, enabling on-vehicle alignment and geometry tuning.
What tubing should I use for off-road suspension linkage rods?
4130 chromoly with a substantial wall for impact resistance. DOM is acceptable for lighter use but can bend under severe impact.
Can SYZ build linkage rods to my specifications?
Yes. SYZ builds custom linkage rods to your center-to-center length, tubing material and size, rod end series, thread direction and finish. Send measurements or a drawing for a quote.
What is the difference between round and hex tube bodies?
Round is standard and lightest. Hex or hex-body adapters add wrench flats so you can hold the tube while tightening jam nuts, which helps in-situ adjustment.
Should I use rod ends or ball joints on a linkage rod?
Use rod ends for higher articulation, bolt-through mounting and stronger fabricated links. Use ball joints for compact ball-stud linkage and quick-disconnect service.
Engineering Tools
Calculators for This Product Family
Check engagement length for loaded threaded connections.
Screen compression members for slenderness and buckling risk.
Calculate adjustment travel and thread engagement.
Evaluate suspension geometry before choosing linkage joints.
Translate wheel load into the force seen by each link.
Factory Direct
Configure & Request Quote
Send us your center-to-center measurements, end-fitting selections, and quantity. We will provide pricing within 24 hours.