Description

Q140MD mid drive frame – Compact. Modular. Strong.

The 2025 Q140MD is Qulbix’s latest high-performance frame, built for both off-road and street use. With a compact, lightweight Cr-Mo steel structure and modular design, it’s ideal for riders who want to build their own electric beast – whether as a pedal-assist e-bike or a full-power electric motorcycle. Perfect for builders, commuters, and off-roaders alike, the Q140MD frame kit offers flexibility, strength, and room to grow.

Key highlights:

• Motor-in-swingarm pivot for constant chain tension – no guides needed, minimum chain slap
• Dual-purpose shell frame serves as structural core and watertight battery housing
• Qulbix Removable Battery System (QRBS) with top-loading and secure lockable hood
• Premium materials: 1200 N/mm2 Cr-Mo steel frame, 7075 aluminum sideplates
• Customizable modular setup: Add components over time, upgrade as you go

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Battery Installation Options:

• Top-Loading (QRBS System – Green Opening)
  For quick and convenient battery installation, use the Qulbix Removable Battery System (QRBS) with the top-loading hood. Compatible batteries are available in the Qulbix shop, or you can build your own to fit the system.
• Side-Loading (for Maximum Capacity – Red Opening)
  To maximise battery size and capacity, use the side opening for installation. Shape the battery pack to match the side cutout, allowing for a higher cell count. You can either build your own high-capacity pack or explore battery kits available in the Qulbix shop. The top hood compartment remains usable as a convenient storage space, even with a side-installed battery.

Motor compatibility:

– Qulbix QS 205 50H V3MD motor (available in Qulbix store)

You can also use standard “in-wheel” QS 205 50H V3 motor (spoke ring does not need to be removed):

What’s included:

Frame

• 1 x Q140MD frame
• 2 x Q140MD aluminium side plate
• 1 x Q140MD hood

Rear shock bracket set

• 4 x M8x16 allen bolt
• 1 x M8x45 hex bolt
• 1 x M8 lock nut
• 6 x M8 washer
• 1 x MD rear shock bracket

Side plate mounting set

• 20 x M5x10 torx bolt
• 20 x M5 lock nut

Clamping drop-out

• 2 x M6x30 allen bolt (drop-out)

Seal set

• 7 x D20 seal
• 3 x D35 seal
• 1 x hood seal, 10 mm wide, 1 m
• 2 x hood bumper sticker, D8x2

Hood mounting and lock set

• 1 x hood lock
• 1 x hood lock seal cap
• 4 x M5x6 torx bolt
• 2 x M5x16 torx bolt
• 6 x M5 lock nut
• 4 x M5 large PA washer
• 2 x M5 large inox washer

Ignition keylock set

• 1x Ignition keyswitch
• 1x M3x8 Torx bolt

Additional information