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Dropper Posts

(23 products)

A dropper post is a height-adjustable seat post used on mountain bikes and gravel bikes. It allows riders to quickly change saddle height - without getting off the bike.

By pressing a lever mounted on the handlebars, riders can lower or raise the seat without stopping. This improves control on technical terrain.

Lowering the saddle helps with steep descents by lowering the centre of gravity. Raising it provides better pedalling ergonomics on flat or uphill sections.

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RockShox Reverb AXS dropper seat post and controller

What is a dropper seat post?

A dropper seat post is a type of adjustable-height seat post that lets the rider quickly raise or lower their saddlewhile riding. This is usually by pressing a handlebar-mounted lever.

Here’s how it works and why it’s useful:

  • Mechanism. Inside the post is a hydraulic or mechanical system, similar to an office chair’s gas spring. The lever releases or engages it so you can change the saddle height instantly.
  • Raise the dropper post for flat terrain or climbs. You keep the saddle high for maximum pedaling efficiency.
  • Keep it lowered for steep descents, jumps, or technical sections. You drop the saddle low so you can shift your body weight more freely and stay balanced.

Benefits:

It’s considered essential equipment for modern trail, enduro, and increasingly XC bikes.

That said, we also install these on hybrid e-bikes for riders with hip mobility issues.

Using the Rockshox Reverb AXS dropper seat post before a descent

Why Choose a Dropper Seat Post?

  • Better Handling on Descents. Lowering the saddle gives you more room to move your body and shift your weight for technical sections.
  • Climb Efficiently. Raise the saddle instantly for optimal pedalling position without stopping.
  • Ride with Confidence. Get your saddle out of the way for jumps, drops, and steep switchbacks.
  • Seamless Adjustment. Operated via a bar-mounted lever, making it easy to adjust without breaking your flow.

Key Features to Look For in a Dropper Seat Post

Travel Length is the distance your saddle can drop from its highest position.

  • 100–125mm: Ideal for XC and smaller riders.
  • 150–200mm: Suited for trail, enduro, and downhill riders who need maximum clearance.

Match the dropper’s diameter to your bike’s seat tube:

  • Common sizes: 27.2mm, 30.9mm, 31.6mm, 34.9mm.
  • Check your bike’s specs or measure your current post before buying.

Actuation Type

  • Mechanical (Cable): Affordable, easy to service.
  • Hydraulic: Smooth operation, more sealed from dirt.
  • Electronic: Wireless, low-maintenance, premium option.

Cable Routing

  • Internal (Stealth): Cable runs inside the frame for a clean look.
  • External: Easier to install because the cable runs outside the frame. Suits older frames.

FAQs - Dropper Posts

Do I need a dropper post for XC riding?

While not essential, it can still boost confidence and efficiency on technical XC courses.

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Can I fit a dropper post to any bike?

Most modern mountain and gravel bikes are compatible. Older frames may require an external-routing post.

How often should I service my dropper post?

Light maintenance (cable checks, cleaning) every few months; a full service annually or as per manufacturer guidelines.

What is the disadvantage to a dropper seat post?

Weight. Maintenance. Cost.

Dropper posts are heavier than a fixed seat post. However, lightweight options do exist.

They need to be serviced yearly (at least), depending on the conditions you ride in.

And, you often need to buy the dropper post, plus the remote. So, they're more expensive than a fixed seat post.

How to Measure Your New Dropper Post

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