A custom ATV shock absorber order usually goes sideways before the first drawing is sent. I have spent more than twenty years designing and building ATV shock absorbers at Yearben, and most delays trace back to missing information at the quotation stage. A photo and a model year are not enough. The factory needs mounting geometry, travel, spring, damping, and finish details to turn your request into a buildable design. When those numbers arrive early, the quote becomes a manufacturing plan instead of an estimate, and the sample stage moves much faster.
Start With ATV Shock Absorber Mounting and End Fitting Geometry
The first dimensions I ask for are the mounting envelope. For an ATV shock absorber, the two end fittings decide almost everything else. You need the eyelet or clevis type, the inner diameter of each bushing, and the width across the mounting point. If the factory guesses wrong, the shock will fit the drawing and not the machine.
| Spec | Why It Matters | Data to Send |
|---|---|---|
| End fitting type | Sets the attachment method | Eyelet or clevis, plus mounting width |
| Bushing inner diameter | Prevents movement or binding | Measured ID and sleeve material |
| Extended length | Defines the longest installed position | Center to center stretched length |
| Compressed length | Defines the shortest position | Center to center collapsed length |
| Stroke | Sets the usable wheel travel window | Shaft travel, never body length only |
| Spring pocket | Limits spring outside diameter | Installed spring ID and available space |
Send the real measurements from the machine, not a catalog guess. I have received orders where the buyer copied a catalog extended length but kept a different mounting width. The shock bolted in, but the bushing walked sideways and damaged the eyelet under load.
Define Travel, Stroke, and Installed Length First
Travel is the number that tells the factory what the shock must do, not just where it sits. Extended length and compressed length set the hard limits. Stroke is the difference between them, and it must match the suspension’s real articulation range. If the stroke is too long, the shock tops out. Too short, and the suspension binds or the shock bottoms out before the bump travel is used.
For a stock replacement, the cleanest data source is the original unit. Measure the center to center length fully extended and fully compressed, then read the shaft stroke. For a performance build with longer arms or a lift, send the target ride height and the full droop position. The factory can work backward from the motion ratio to set the correct stroke. Without that data, the only safe path is to duplicate the original unit exactly. Most custom orders that go wrong at first sample do so because the requested travel did not match the final ride height.
Specify Spring Rate, Preload, and Adjustment Range
Spring rate controls how much load the ATV shock absorber carries before movement, and preload sets where it starts. These two values depend on the vehicle’s corner weight and the intended use. A trail machine carries a different rate than a desert racer. I prefer to receive the ATV’s ready to ride weight per axle, the rider and accessory load, and the riding style. From there we can recommend a rate instead of forcing the buyer to calculate it.
If you do not have the original rate, send the wire diameter, coil outside diameter, and free length measured from the spring. Those dimensions tell us the rate and show whether it matches your load. This is more reliable than copying a painted color code.
For adjustable shocks, state the adjustment range you actually need. A single compression adjuster is simpler and cheaper than a dual speed setup. If you will not tune rebound, do not pay for a dual adjuster. I tell buyers to separate what they need from what the catalog page shows.
If your ATV carries a heavy winch, rack, or long travel arm, confirming the exact spring rate and packing space matters more than the shock model name. Send those load figures to info@yearbenshocks.com before the quote is final and we can check the static sag target.
Confirm Damping, Gas Charge, and Reservoir Configuration
Damping valving decides how the ATV shock absorber absorbs a rock hit compared with a full compression landing. I ask for the main terrain type and the hardest impact the machine sees, because those two facts shape compression and rebound forces. A standard gas charged shock works well for trail and utility use. A remote reservoir or piggyback adds oil volume and cooling for sustained high speed work, which matters in sand and desert running. If the order is for a dual rate or coilover build, confirm whether the reservoir hose length and bracket position must match an existing frame mount. This detail is easy to overlook until the shock arrives and the hose will not reach.
Once valving and charge are set, lock the rod finish, body finish, and spring coating. For corrosive or coastal environments, specify a higher grade surface treatment because standard plating may not last. This is the type of requirement that should come at the quotation stage, not after the sample is built.
Turn the Custom ATV Shock Absorber Order Into a Quote
A clear spec sheet gets a clear quote. If you have the mounting and end fitting geometry from the original unit, the travel and stroke, the spring rate or load data, and the damping and reservoir requirements, send them together with your target quantity. We can check feasibility, confirm tooling requirements, and return a sample and production timeline that matches the machine you are actually building.
Email the full package to info@yearbenshocks.com or call +86-523-86566899. The faster the dimensions arrive, the faster the first sample comes back.
Check These Questions Before You Send the Custom Order
Do I need to send the original shock absorber to get an exact match?
No, but sending either the original unit or a measured drawing removes most of the guesswork. If the unit is damaged or still in service, send the six dimensions from the table above plus a clear photo of both ends. For a stock replacement, those measurements let us match the extended length, stroke, and bushing inner diameter without the part in hand. For a performance upgrade, we prefer the original as a baseline because it shows the mounting angle and spring seat position, which affect how the new shock behaves under compression.
Which changes ride quality more, a reservoir or a different spring rate?
A reservoir is often the first upgrade buyers request, but it is the spring rate that changes ride quality most on a standard ATV. A remote reservoir mainly controls heat fade and stabilizes damping during repeated hard hits. If the machine is trail ridden and the current spring is too stiff, changing rate and preload will produce a larger comfort gain than adding a reservoir. For desert or dune use, the reservoir becomes the priority because oil temperature rises quickly under sustained speed.
How do you handle a new model that has no original sample?
It depends on whether you have a physical machine or a drawing. If the vehicle exists, measure the mounting points and the full suspension cycle. If the new model is still in design, send the CAD frame points, the unsprung mass estimate, and the intended ride height. We can work from either path. The difference is that a measured machine can move to a confirmation sample quickly, while a design stage order usually includes a prototype loop for valving and spring tuning before production.
What is the smallest detail most buyers forget when ordering custom ATV shocks?
In the orders I have reviewed, it is the bushing inner diameter and the mounting width, not the dramatic numbers like travel or spring rate. Those small dimensions decide whether the shock drops into the existing bolt and stays centered. A mismatch of one millimeter on a bushing ID turns a correctly valved shock into a warranty problem because the eyelet works against the sleeve. Before sending the order, I check those two measurements twice. Tell us your machine model and intended load, and we can confirm whether a stock or custom option will fit.
If you’re interested, check out these related articles:
Heavy duty seat damper 35mm, Shock Absorber Manufacturer
Truck-Seat-Damper-38MM-Shock-Absorber-Manufacturer
Best-Off-Road-Shocks
Damping-Adjustable-Shock-Absorber
Adjustable Seat Damper 41.5mm
