Hagon Shocks for Tomos: Custom Suspension Upgrade Guide

Watch: why Hagon Roadshocks are different

In this video, we visit the official Hagon importer in the Benelux and look at what makes a premium moped shock absorber different from a basic replacement shock. It is a useful visual companion to this guide if you want to understand the difference between shock length, spring choice, damping, comfort, and control.

Video length: 6:04. Uploaded: 22 April 2026. The video explains why the right shock absorber setup matters for comfort, handling, and control.

Why upgrade the suspension on a Tomos?

Many original Tomos shock absorbers are decades old. Even if they still look acceptable from the outside, the damping can be weak or leaking, the springs can sag, and the rear of the bike can feel loose over bumps. That affects comfort, but it also affects traction and control.

Worn or poorly matched shocks can cause:

• Poor stability at higher speeds
• Excessive bouncing after bumps
• Reduced rear-wheel grip on rough roads
• A harsh or uncontrolled ride
• Less confidence when cornering or braking

A good suspension upgrade does not just make the moped look better. It helps the rear wheel stay in contact with the road, which makes the bike feel more planted and easier to control.

Who is Hagon?

Hagon has a long history in British motorcycle racing and is known for custom shock absorbers for motorcycles, mopeds, classic bikes, sidecars, and special applications. Hagon presents the brand around comfort, safety, craftsmanship, and personal setup advice.

That matters for Tomos because classic mopeds are rarely all used in the same way. One rider may want a comfortable street setup, another may want a firmer ride for a tuned A35 or A55 engine, and another may be building a custom or race-style Tomos. The suspension should match the way the bike is actually used.

What makes Hagon Roadshocks different?

Generic aftermarket shocks are often chosen only by length and appearance. Hagon Roadshocks are different because the setup can be matched more carefully to the rider, the vehicle, and the intended use. Hagon also makes an important point: the damper type and spring rate must be coordinated. A universal damper with different springs is not the correct way to build a proper suspension setup.

Important setup factors include:

• Rider weight
• Riding style
• Tomos model and frame setup
• Street, touring, custom, performance, or offroad use
• Preferred balance between comfort and stiffness
• Correct combination of damper type and spring rate

The classic Hagon Roadshock style is especially relevant for a Tomos because it keeps a clean, period-correct look while giving you modern hydraulic damping, progressive springs, and adjustable spring preload. For Tomos builds, the key is to choose the correct length first, then match the spring and damping setup to the rider and use.

The 290 mm versions are a good visual reference for the classic Hagon Roadshock look. For most Tomos street builds, 280 mm remains the standard-feeling starting point. Other shock lengths are listed in the comparison table below.

Shop 290mm black / chrome Shop 290mm all-black

How Hagon Roadshocks work

The Hagon Roadshock uses hydraulic damping. Inside the shock, a piston moves through an oil-filled cylinder. When the rear wheel hits a bump, the shock compresses and the piston forces oil through small passages and valves. That controlled oil flow slows the suspension movement gradually instead of letting the rear end bounce freely.

The Roadshock also uses an emulsion system, where oil and nitrogen are in one chamber. Hagon describes this as a simple and reliable design with fewer components, fewer wear points, and less chance of leaks or pressure loss. For street-driven mopeds, that is exactly what you want: consistent damping without unnecessary complexity.

Another important feature is the progressive spring. A progressive spring becomes firmer as it compresses. That means the first part of the travel can stay comfortable over small bumps, while the spring adds more support when you hit a larger bump, ride harder, or load the rear suspension more aggressively.

Finally, the adjustable preload ring lets you fine tune the starting compression of the spring. This helps adapt the shock response to rider weight and riding style after installation.

Choosing the right shock length

Shock length changes more than the look of the moped. It affects ride height, rear suspension angle, steering feel, stand angle, chain clearance, tire clearance, and fender clearance. For many Tomos builds, 280 mm is the closest to a standard-feeling setup. A 290 mm shock gives a small lift, 300 mm raises the rear more noticeably, and 320 mm should be treated as a high rear setup that needs careful clearance checks.

The travel number matters because it tells you how much movement the shock has between extended and compressed positions. More travel can help the suspension absorb bumps more smoothly, but only if the frame, tire, fender, chain, and stand clearance all work with the chosen length.

Rider weight, spring rate, and damping

The spring holds the weight of the rider and moped. The damper controls how fast the suspension moves. Both parts need to work together. A spring that is too soft will sit too low and bottom out easily. A spring that is too stiff can reduce comfort and traction. Weak damping can make the moped bounce, while excessive damping can make the rear feel harsh.

Hagon lists 5 damper types and 12 spring rates for the Roadshock range. That does not mean every rider simply needs the stiffest option. The correct setup is a matched combination. A 70 kg rider, a 90 kg rider, and a rider carrying luggage or riding aggressively do not need the exact same setup. A tuned Tomos that is ridden hard also asks more from the suspension than a standard cruising bike.

For Tomos riders, the main takeaway is simple: choose the shock length for the stance and fitment, then make sure the spring and damper setup match the rider and how the moped is used.

Adjustable preload and fine tuning

Preload is the first adjustment you should understand after installing new shocks. Increasing preload compresses the spring slightly before you sit on the bike. This can help set the correct sag and stop the rear from sitting too low.

Preload does not replace the correct spring rate. If the spring is completely wrong for your weight, adding preload is only a temporary workaround. The goal is to start with the correct spring and damping choice, then use preload for fine tuning.

On Hagon Roadshock units, the adjustable spring preload gives you a simple way to tune the rear suspension after installation. Start with the lightest practical setting, sit on the moped, check the sag, and increase preload only if the rear sits too low or feels too soft under load.

Installation checks for a Tomos

Installing rear shocks is usually straightforward, but small fitment details matter. Always compare the new shocks to the old ones before installation, and check the mounting bush width, bolt diameter, washer position, and clearance around the chain, tire, fender, and frame.

As a general Tomos A35/A52/A55 reference, the shock absorber bolt is listed as M10 at 25 Nm. Use this as a reference value only, and always confirm the correct value for your own frame, hardware, and aftermarket parts before final assembly.

Available Hagon Roadshock options at Tomoshop

For Tomos builds, the most important starting point is the 280 mm length because it keeps the rear ride height close to standard on many Tomos models. Longer lengths can work, but they change the stance and geometry.

The best choice depends on what you want from the moped. A daily street bike usually benefits from comfort and control. A tuned setup may need more stability and a firmer rear feel. A show or custom build may place more importance on finish and stance, but the shock still needs to work correctly on the road.

You can also view the full Tomos Hagon shock absorber assortment at Tomoshop.

Are Hagon shocks worth it?

If your current shocks are old, leaking, too soft, or low-quality replacements, the upgrade is immediately noticeable. You can expect a more controlled rear end, better comfort over bumps, and more predictable handling at speed.

For performance builds, suspension is just as important as the engine setup. More speed only feels good if the moped can stay stable, absorb bumps, and keep grip through corners. Good shocks make the whole bike feel more complete.

Conclusion

Hagon Roadshocks are a strong upgrade for a Tomos because they combine classic styling with a more serious suspension setup. The hydraulic damping, emulsion design, progressive springs, coordinated damper and spring options, and preload adjustment all help create a rear suspension setup that feels more stable and controlled than worn original shocks.

For most Tomos riders, 280 mm is the safest starting point if you want a standard-feeling ride height. A 290 mm shock gives a small rear lift, 300 mm is a sportier raised setup, and 320 mm is best reserved for high-stance custom or dirt-style builds where clearance has been checked carefully. Whichever length you choose, make sure the setup matches your weight, riding style, and the way your Tomos is built.

FAQ: Hagon shocks for Tomos