Expandable Aluminum Side Cases – 70mm Telescopic Expansion, Fits XL Modular Helmet, 10kg Capacity

$37.99 USD
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Product Introduction

Ever found yourself leaving your helmet behind because your side cases were too small — or squeezing your bike through gaps that felt tighter than they should?

We know the feeling. So we built a solution that adapts to your ride.

A set of expandable aluminum side cases built around a patented Dynamic Tensigrity mechanism — a compensated tension system inspired by architecture that lets the cases expand and contract telescopically in seconds. Press a button and the case grows +70mm in width, increasing volume by 40% — enough to swallow an XL modular helmet (ECE 22-06) with room to spare. Need to squeeze through traffic or park in a tight garage? Push it back together and you're back to the most compact helmet-capable case on the market. The aluminum cover delivers rigidity at minimal weight, while the Double Locking System secures the case to the bike and seals the contents with a single turn of the key. Built for touring riders, daily commuters, and anyone who refuses to choose between cargo capacity and lane-splitting confidence.

⭐ Customer Reviews

Marcus T.
M

"The expansion mechanism is genius. I ride a GS and needed cases that could hold my modular helmet for daily commutes but narrow enough for city filtering. These do both. The +70mm expansion takes literally two seconds."

★★★★★
Sarah K.
S

"I was skeptical about the Tensigrity system — it sounded like marketing. But after a year of use, the expansion still feels factory-tight. No rattles, no leaks, no sag. This is genuinely well-engineered."

★★★★★
David R.
D

"The single-key system is underrated. One key opens both cases, and you can add a third lock for a top case so everything runs off the same key. No more fumbling with a keyring full of locks."

★★★★★
Jessica M.
J

"The aluminum finish looks incredible in person. It's rigid but not heavy — my bike doesn't feel top-heavy even when both cases are loaded. The integrated handle makes carrying them into a hotel effortless."

★★★★★
Tom B.
T

"Rode through a full day of rain on a tour and everything inside stayed bone dry. The double-channel frame with rubber seals actually works. My old cases leaked at the seams — these don't."

★★★★★
Priya N.
P

"The inner nets and tray are small touches that make a big difference. I can keep small items from sliding around and access my documents without digging through the whole case. Thoughtful design."

★★★★★
Chris L.
C

"The Reddot award caught my attention, but the function is what keeps me using them daily. Expanding for grocery runs and shrinking for the daily commute — it's the versatility I didn't know I needed."

★★★★★
Emma W.
E

"I bought these for my partner's adventure bike. He said it's the best luggage investment he's made. The 10kg per-side capacity handles everything he throws at them, and they still look brand new."

★★★★★

Product Features

🏆 Dynamic Tensigrity Expansion —Inspired by architectural tensigrity structures, the mechanism expands and contracts uniformly with no sag, no rattles, and no loss of structural integrity. Press a button, pull the case outward, and it locks into place in seconds.

📐 +70mm Expansion = 40% More Volume — fits an XL modular helmet when open. Compressed: 23L per case. Expanded: 36L per case — enough for an XL modular helmet (ECE 22-06). When narrow, it's the most compact helmet-capable case on the market. When wide, it swallows a full touring load.

🔒 Premium Smart Lock + Double Locking System — one key, two functions. A single turn of the key simultaneously locks the case to the motorcycle and seals the interior. Includes 2 safety keys and an extra cylinder lock, so one key can operate three cases (side cases + optional top case).

🌧️ Double-Channel Frame with Rubber Seals — proven water resistance. The aluminum cover and double-channel frame construction keep contents dry in sustained rain. Rigid enough for off-road vibration, light enough to avoid upsetting your bike's handling.

🧳 Integrated Retractable Handle + Inner Nets & Tray Included. The large fold-out handle makes carrying the case off the bike effortless. Each case includes an inner net and a load tray to keep smaller items organized and prevent shifting during the ride. 10kg recommended load per side.

Frequently Asked Questions

What's the actual volume and weight of each case?
Each case holds 23 liters in the compressed position and expands to 36 liters at full extension (+70mm, 40% increase). The set weighs approximately 12.5 kg total (roughly 5.76 kg per case). Maximum recommended load is 10 kg per side.
Will these fit my motorcycle?
It can be used for any type
What helmet sizes fit inside?
When fully expanded, each case can accommodate one XL modular helmet (ECE 22-06). In the compressed position, the case is too narrow for most full-face helmets but is ideal for gloves, rain gear, tools, and daily essentials.
Are they waterproof?
Yes. The double-channel frame with rubber seals is designed to keep contents dry in rain. They are water-resistant and handle sustained wet weather, but they are not intended for submersion.
Does one key really open everything?
The set includes 2 safety keys and an extra cylinder lock. One key can open both side cases and, if you install the extra cylinder in a compatible top case, a third case as well. A single turn locks the interior access and secures the case to the bike simultaneously.
Can I remove the cases quickly?
Yes. The Double Locking System allows you to open, close, remove, and reattach the cases in seconds. The integrated retractable handle makes carrying them easy when off the bike.

Specifications

  • Expansion: +70mm telescopic, 40% volume increase
  • Volume per case: 23L (compressed) / 36L (expanded)
  • Dimensions per case (L × W × H): 50 × 27/34 × 39 cm
  • Weight: Approx. 12.5 kg (set) / 5.76 kg per case
  • Max load: 10 kg per case (recommended)
  • Cover material: Aluminum (rigid, lightweight)
  • Frame: Double-channel with rubber seals
  • Locking: Premium Smart Lock with Double Locking System
  • Mounting: It can be used for any type
  • Included: Inner nets, internal tray, 2 safety keys, 1 extra cylinder lock
  • Best for: Touring, commuting, adventure riding, daily use

What's in the Box

  • 1 × Set of Expandable Side Cases (Left + Right)
  • 3 × Locks (2 for side cases + 1 for optional top case)
  • 2 × Safety Keys
  • 2 × Inner Nets
  • 2 × Internal Load Trays
  • 1 × User Guide

✨ Expand when you need it. Compress when you don't. Ride with confidence either way.

Ordering & Delivery

Payment, Shipping & Dispatch Information

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Global Distribution

We offer global delivery services. Orders will be dispatched to the destination through appropriate international logistics channels to ensure that the goods can be safely delivered.

The actual delivery time may be affected by:

  • The country or region where the goods will be received
  • International transportation routes
  • Customs clearance time
  • Local delivery efficiency
  • Holidays and weather conditions

Some remote areas may temporarily be unable to receive deliveries. If your address cannot be arranged for transportation, we will contact you during the order processing.

Delivery Instructions

Regular standard specifications:

Usually dispatched within approximately 5 working days after placing the order.

Special specifications:

Expected to be shipped progressively starting from October 1, 2026, and the goods will be released from storage in the order of the received orders.

The actual delivery time may vary slightly depending on the selected size, color and inventory status.