Rear Shock Bushings and MTB Shock Mounting Hardware
We manufacture precision rear shock bushings and shock mounting hardware for mountain bikes. Every kit is machined in house to suit your specific frame and shock, removing the guesswork that often comes with ordering generic hardware.
Our rear shock bushings are compatible with all major suspension brands including Fox, RockShox, EXT, DVO, Cane Creek and X Fusion.
Enter your bike and shock model when ordering, or select the size if you already know it. We machine the hardware to suit, removing any guesswork or need to measure.
Beautifully made, long lasting Shock Hardware for your bike
Here at Offset we've been producing Shock Hardware kits since 2010. They've been tested by riders competing in everything from the Red Bull Rampage to the UCI Downhill World Cup and beyond. We're proud of our reputation in the industry, with over 25,000 riders worldwide running our products.
This is our Standard Bushing, machined to fit your specific bike / shock combination in under 2 days.
- Full Replacement Kit: Center-drilled for easy installation of new shocks or replacement of worn bushings
- Guaranteed to fit: Available in all sizes to ensure a flawless fit every time
- Trusted by Pros: Recommended by professional race teams, leading bike brands and local bike shops
- Highly Rated: Backed by hundreds of 5-star reviews from real riders around the world
- Worldwide Shipping: Fast, reliable delivery to anywhere on the globe - learn more
- Includes a high-quality igus® DU bush
- Compatible with all major brands, such as Fox, Rockshox, Cane Creek, DVO, Marzocchi, EXT, Push & more using 12.7mm diameter hardware
- Machined in-house from Brass with Aluminium spacers for exceptional performance and durability - learn more
- User-friendly design for hassle free installation - learn more
- Your bushing might look different to our photos, don't worry! They come in many different sizes
Our kit is designed for all modern shocks using the 12.7mm eyelet industry standard. That includes but is not limited to...
- RockShox
- Fox
- Cane Creek
- BOS (12.7mm)
- X-Fusion (12.7mm)
- DVO
- Manitou (12.7mm)
- MRP
- Marzocchi
- 5th Element
- EXT
- Push
- Öhlins - STX, TTX Universal (12.7mm models only)
What Are Rear Shock Bushings?
Rear shock bushings, often referred to as shock mounting hardware, sit inside the eyelet of your rear shock and allow it to pivot smoothly within the frame. They provide a precise interface between the shock and the mounting bolt, ensuring correct alignment and controlled movement under load.
They are produced in a wide range of sizes, from common metric standards to unique dimensions specific to certain frames.
Over time these bushings wear, which can lead to play in the shock mount or knocking under compression. Replacing worn hardware restores proper fit and keeps the suspension operating as intended.
Most rear shocks use a 15mm diameter eyelet at each end. A DU bushing is pressed into this eyelet, reducing the internal diameter to 12.7mm. The shock mounting hardware is then fitted through this in the size required for the frame.
Eyelet vs Trunnion Mount Shocks
Most rear shocks use a traditional eyelet mount at each end. These eyelets accept a DU bushing and shock mounting hardware, which allows the shock to pivot within the frame.
Some modern frames use a trunnion mount at one end of the shock. Trunnion shocks bolt directly into the frame and do not use standard mounting hardware at that end. The opposite end may still use a conventional eyelet and hardware kit.
If your shock has round eyelets with a removable DU bushing inside, it uses standard rear shock bushings.
12mm vs 12.7mm (½") Shock Eyelets
Most modern mountain bike shocks from brands such as Fox and RockShox use a 12.7mm internal eyelet once the DU bushing is installed. This is often referred to as a half inch eyelet.
Very few shocks use a 12mm internal diameter eyelet instead. These are typically older models such as Ohlins STX, DNM or some pre 2012 Manitou shocks. The difference in size is small, but the hardware is not interchangeable. Fitting the wrong size can cause movement in the mount or damage to the frame.
All of our standard rear shock bushing kits are designed for 12.7mm eyelets. If you are unsure which size your shock uses, enter your shock model when ordering and we will confirm this for you.
Rear shock bushings, often referred to as shock mounting hardware, sit inside the eyelet of your rear shock and allow it to pivot smoothly within the frame. They provide a precise interface between the shock and the mounting bolt, ensuring correct alignment and controlled movement under load.
They are produced in a wide range of sizes, from common metric standards to unique dimensions specific to certain frames.
Over time these bushings wear, which can lead to play in the shock mount or knocking under compression. Replacing worn hardware restores proper fit and keeps the suspension operating as intended.
Most rear shocks use a 15mm diameter eyelet at each end. A DU bushing is pressed into this eyelet, reducing the internal diameter to 12.7mm. The shock mounting hardware is then fitted through this in the size required for the frame.
Most rear shocks use a traditional eyelet mount at each end. These eyelets accept a DU bushing and shock mounting hardware, which allows the shock to pivot within the frame.
Some modern frames use a trunnion mount at one end of the shock. Trunnion shocks bolt directly into the frame and do not use standard mounting hardware at that end. The opposite end may still use a conventional eyelet and hardware kit.
If your shock has round eyelets with a removable DU bushing inside, it uses standard rear shock bushings.
Most modern mountain bike shocks from brands such as Fox and RockShox use a 12.7mm internal eyelet once the DU bushing is installed. This is often referred to as a half inch eyelet.
Very few shocks use a 12mm internal diameter eyelet instead. These are typically older models such as Ohlins STX, DNM or some pre 2012 Manitou shocks. The difference in size is small, but the hardware is not interchangeable. Fitting the wrong size can cause movement in the mount or damage to the frame.
All of our standard rear shock bushing kits are designed for 12.7mm eyelets. If you are unsure which size your shock uses, enter your shock model when ordering and we will confirm this for you.
How Rear Shock Bushing Sizes Work
Rear shock bushing sizes are written as two numbers, for example 20x8 or 22.2x8.
The first number refers to the mounting width. This is the distance between the frame mounting tabs that the hardware sits between once installed.
The second number refers to the bolt diameter. Most frames use 8mm, although some use 6mm or 10mm.
Using the correct size ensures the shock sits square in the frame and moves freely under load. If you are unsure which size your bike requires, enter your frame and shock model when ordering and we will machine the hardware to suit.
Example sizing
20mm
8mm
12.7mm
No Measuring Required
We hold detailed sizing data for a wide range of mountain bike frames and rear shocks. Rather than asking you to measure mounting widths or bolt diameters, we machine each kit to suit the specific frame and shock model provided when ordering.
This removes the risk of ordering the wrong size and ensures the hardware fits correctly without modification.
If you already know your mounting size, you can select it directly. If not, simply enter your bike and shock details and we will take care of the rest.
FAQ
Why Correct Shock Hardware Matters
Incorrectly sized shock hardware can cause side loading, premature DU bushing wear and frame damage. Precision fitment ensures smooth pivoting movement and protects both the shock and frame.
Where do you ship to?
We ship worldwide. Shipping options and delivery times are shown at checkout based on your location.
How long does it take to machine and ship my order?
All rear shock bushings are machined to order. Most orders are dispatched within just two working days. During busy periods this may vary slightly, but we will always confirm lead time if required.
What size rear shock bushings do I need?
Each frame is designed around a specific mounting width and bolt diameter. If you know your size, you can select it directly. If not, enter your frame and shock model when ordering and we will machine the correct hardware to suit.
How do I know if my shock bushings are worn?
Signs of wear include visible play at the shock mount, knocking under compression, or ovalisation of the DU bushing. If in doubt, removal and inspection is recommended.
Do trunnion shocks use standard mounting hardware?
Trunnion shocks do not use traditional hardware at the trunnion end, but the opposite eyelet may still require a standard mounting kit.
Are your rear shock bushings compatible with Fox and RockShox?
Our rear shock bushing kits are designed for modern eyelet style mountain bike shocks from leading suspension brands. These include, but are not limited to:
- RockShox
- Fox
- Cane Creek
- BOS (12.7mm)
- X-Fusion (12.7mm)
- DVO
- Manitou (12.7mm)
- MRP
- Marzocchi
- 5th Element
- EXT
- Push
- Öhlins - STX (12.7mm models only), TTX Universal
(TTX uses either 14mm or 12.7mm bushings as standard. If yours is using 14mm then you also need this product to use our bushings.)
Do I need to replace the DU bushing at the same time?
If there is noticeable play in the shock eyelet or visible wear, replacing the DU bushing is recommended. We offer replacement DU bushings and the correct tool for installation.
Shock Bushings or Shock Hardware?
These are often used interchangeably, however we refer to the entire kit as 'hardware' whilst the main component and associated spacers are known as the 'bushing'.
What are Offset Bushings?
Offset bushings are a type of rear shock bushing where the bolt hole is positioned slightly off centre. This allows small adjustments to a bike’s geometry by subtly altering head angle and bottom bracket height. You can learn about Offset Bushings here and order them here. Offset Bushings were the original product we developed, which is where our name comes from.