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MEROCA RAO Hollow Integrated Crankset 170mm 32/34/38T Narrow-Wide Chainring 24mm Spindle, 8-12 Speed MTB Single Ring
MEROCA RAO Hollow Integrated Crankset 170mm 32/34/38T Narrow-Wide Chainring 24mm Spindle, 8-12 Speed MTB Single Ring
Regular price
$32.00 USD
Regular price
$69.90 USD
Sale price
$32.00 USD
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Product Description
Overview
Upgrade your mountain bike or folding bike drivetrain with the MEROCA RAO Hollow Integrated Crankset. Forged from lightweight aluminum alloy, this single-ring crank features a narrow-wide (positive/negative tooth) chainring design to keep the chain securely in place—no chain guide needed. With a 24mm spindle, 170mm arm length, and 8–12 speed compatibility, it’s a solid, wallet-friendly upgrade for MTB single-speed / 1x builds.
Key Features
✅ Hollow Integrated Design – Reduces weight while maintaining stiffness; left/right crank arms weigh just 700g together.
✅ Narrow-Wide Chainring (Positive/Negative Teeth) – Excellent chain retention on rough terrain; ideal for 1x drivetrains.
✅ Multi-Tooth & Multi-Speed – Available in 32T / 34T / 38T; compatible with 8/9/10/11/12 speed chains (note: original source text had a double colon "速别::" and listed 8/9/10/11/12, main title emphasizes 9-12 MTB mod).
✅ 24mm Spindle, 118mm Length – Standard 24mm outer-diameter axle, 118mm spindle length fits common BSA/BB shells (confirm BB type before order).
✅ 170mm Crank Arm – Balanced leverage and pedal clearance for most riders.
✅ Two Color Options – Black / Red anodized finish to match your bike's style.
Specifications
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Parameter
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Details
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|---|---|
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Brand
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MEROCA
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Model
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RAO
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Product
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Hollow Integrated Crankset / Single Ring Crankset
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|
Material
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Aluminum Alloy
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Crank Arm Length
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170 mm
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|
Chainring Teeth
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32T / 34T / 38T (Narrow-Wide / Positive-Negative Tooth)
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|
Spindle / Axle OD
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24 mm
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Spindle Length
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118 mm
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|
Weight (Left + Right Crank)
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700 g (chainring/bb weight not included unless specified)
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|
Speed Compatibility
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8 / 9 / 10 / 11 / 12 Speed
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Colors
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Black / Red
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Application
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MTB, folding bike 1x conversion, single-disc modification
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Why Choose the MEROCA RAO Hollow Crankset?
- Better chain security – Narrow-wide teeth grip the chain firmly, reducing drops on bumps and jumps.
- Light yet rigid – Hollow aluminum forging cuts grams (700g crank arms) without sacrificing pedaling stiffness.
- 1x drivetrain ready – Ditch the front derailleur and simplify your cockpit; perfect for modern MTB or minimalist folder builds.
- Plug-and-play with 24mm BBs – Standard 24x118mm axle fits most 68/73mm BSA bottom brackets (BB sold separately).
Installation Note
⚠️ Confirm your bottom bracket shell width, BB type, and chainline requirement before ordering.
⚠️ 24mm spindle / 118mm length typically suits 68–73mm BSA shells; measure your existing setup first.
⚠️ Torque crank bolts to the correct spec; check chainring bolts and re-tighten after the first 50 km.
Package Includes
- 1 × MEROCA RAO Left Crank Arm
- 1 × MEROCA RAO Right Crank Arm (with 24mm integrated spindle)
- 1 × Narrow-Wide Chainring (32T / 34T / 38T selected variant)
(Bottom bracket and pedals not included unless stated in your variant.)
