One of the most common reasons customers order the wrong shock absorber is a mounting type mismatch. Your vehicle's suspension uses a specific style of mount at the top and bottom of each shock — and if the replacement shock doesn't match, it simply won't bolt up. Understanding the basic mounting types before you order can save you time, money, and a frustrating return.

Why Mounting Type Matters

Every shock absorber attaches to your vehicle at two points: the top mount (connected to the frame or body) and the bottom mount (connected to the axle, control arm, or knuckle). The shape of each end determines how the shock physically bolts into place. Even if a shock is designed for your exact year, make, and model, different trim levels or suspension packages can sometimes use different mounting styles — so it pays to verify what you have before ordering.

Common Shock Absorber Mounting Types

1. Eyelet (Eye Ring / Loop Mount)

An eyelet mount is a round ring or "eye" at the end of the shock. A bolt passes through the ring and into the vehicle's mounting bracket. Eyelets typically use a rubber bushing pressed inside the ring to absorb vibration and allow slight movement.

• What it looks like: A round loop or ring at the end of the shock body
• Common on: Many trucks, SUVs, Jeeps, and off-road vehicles — especially at the bottom mount
• Brands that use it: Fox, Bilstein 5100 series, Rancho RS5000/RS9000, and many OE replacement shocks

A shock described as "eye-to-eye" or "eyelet-to-eyelet" has a ring mount on both the top and bottom. This is very common on solid-axle trucks and SUVs.

2. Bar Pin (Bayonet / Cross Pin)

A bar pin mount (sometimes called a cross pin or bayonet) is a metal pin that protrudes from the end of the shock. It slides into a rubber bushing or grommet in the vehicle's mounting point. Bar pins are narrower than eyelets and are inserted rather than bolted through.

• What it looks like: A straight metal pin or peg sticking out from the shock end
• Common on: Many domestic trucks and SUVs, especially at the top mount on vehicles with frame-mounted shock towers
• Key detail: Bar pins and eyelets are not interchangeable — a bar pin cannot be used in an eyelet mount and vice versa

3. Stem (Stud Mount)

A stem mount is a threaded stud at the top of the shock. The stud passes up through a hole in the vehicle's mounting point and is secured with a nut on top. Stem mounts almost always include rubber bushings and a metal washer to cushion the connection.

• What it looks like: A threaded rod extending from the top of the shock, usually with bushings and hardware included
• Common on: Many passenger cars, sedans, and some light trucks — especially at the top mount on vehicles with strut towers
• Key detail: Stem mounts are very common on OE replacement shocks for everyday vehicles

4. Flange Mount

A flange mount uses two or three bolts to attach a flat plate at the top or bottom of the shock directly to the vehicle. This style is common on newer vehicles, especially those with independent rear suspension.

• What it looks like: A flat metal plate with bolt holes at the end of the shock
• Common on: Late-model trucks, SUVs, and crossovers with independent rear suspension

Common Mounting Combinations

Most shocks use one type at the top and another at the bottom. Here are the combinations you'll see most often:

• Eye-Eye: Eyelet on top, eyelet on bottom — very common on solid-axle trucks and Jeeps
• Stem-Eye: Stem (stud) on top, eyelet on bottom — common on many passenger vehicles and light trucks
• Bar Pin-Eye: Bar pin on top, eyelet on bottom — found on many domestic trucks
• Stem-Stem: Stem on both top and bottom — less common but found on some applications
• Stem-Flange: Stem on top, flange bolts on bottom — seen on newer SUVs and crossovers

How to Check Your Mounting Type Before Ordering

Before placing your order, take a minute to confirm what mounting style your vehicle uses:

1. Look at your current shocks. If you can see them, note the shape of each end. Is it a round ring (eyelet), a metal pin (bar pin), or a threaded stud (stem)?
2. Take a photo. A quick picture of the top and bottom of your current shock makes it easy to compare against what you're ordering.
3. Check the product listing. On Shockwarehouse.com, product descriptions and images typically show the mounting style. Pay attention to both the top and bottom ends.
4. Use your VIN. If you're not sure about your vehicle's exact configuration — especially whether it has 2WD or 4WD, a lifted suspension, or an air suspension option — your VIN can help us look up the correct application.
5. Ask us. If you're ever unsure, contact Shockwarehouse before you order. We'd much rather help you get the right part the first time than process a return.

What Happens If You Order the Wrong Mounting Type?

If you receive a shock that doesn't match your vehicle's mounting style, don't try to force it. Using the wrong mount can cause the shock to fail, damage your suspension components, or create a safety hazard. Instead:

• Contact Shockwarehouse and we'll help you identify the correct part
• We can process an exchange for the right shock — see our returns and exchanges guide for details
• Taking photos of what you received vs. what your vehicle needs helps us get you the right part faster

Quick Reference Table

Mount Type	Looks Like	Attached With	Commonly Found On
Eyelet (Eye)	Round ring or loop	Through-bolt	Trucks, SUVs, Jeeps, off-road vehicles
Bar Pin	Straight metal pin/peg	Slides into grommet	Domestic trucks, SUVs (usually top mount)
Stem (Stud)	Threaded rod	Nut and washer	Cars, sedans, light trucks (usually top mount)
Flange	Flat plate with bolt holes	2-3 bolts	Newer SUVs, crossovers, IRS vehicles

Still not sure which mounting type your vehicle uses? Contact us with your year, make, model, and a photo of your current shocks — we'll help you find the perfect fit.