RSX Mountain Bike Direct Mount Stem 31.8mm vs Aluminum MTB Stem 1-1/8" 31.8mm, 35mm length

Overall winner: Aluminum MTB Stem 1-1/8" 31.8mm, 35mm length

Key Differences

FIFTY-FIFTY (B0924G8YVT) is a very lightweight 132g 6061-T6 CNC stem designed for 1-1/8" steerers and 31.8mm bars with a fixed 35mm length, while the Funn RSX (B076PSMVZ2) is a CNC 6061 direct-mount stem for 31.8mm bars aimed at dual-crown/downhill setups. Choose the FIFTY-FIFTY if you want a lighter, more affordable 1-1/8" steerer stem; choose the Funn if you need a direct-mount stem for dual-crown forks and downhill applications

RSX Mountain Bike Direct Mount Stem 31.8mm

RSX Mountain Bike Direct Mount Stem 31.8mm

Funn • ★ 3.9/5 • Mid-Range

Direct mount bike stem for dual crown forks, CNC machined from 6061 alloy for rigidity and lightweight build. Customers note easy installation, secure fit, and good appearance

Pros

  • direct mount compatibility for dual crown forks
  • precision CNC 6061 alloy
  • lightweight and rigid design
  • easy to install and adjust

Cons

  • 31.8mm diameter only
  • requires correct handlebar compatibility check
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Aluminum MTB Stem 1-1/8" 31.8mm, 35mm length

Aluminum MTB Stem 1-1/8" 31.8mm, 35mm length

FIFTY-FIFTY • ★ 4.1/5 • Mid-Range

6061T6 aluminum MTB stem, CNC machined for light weight and strength. Fits 1-1/8" steerers and 31.8mm bars. One customer notes easy installation and good value

Pros

  • lightweight 132g
  • full CNC machining
  • compatible with 1-1/8" steerer and 31.8mm bars
  • strong, well-made finish

Cons

  • specific length only
  • no alternative bar diameter options listed
Check current price on Amazon →

Head-to-Head

CriteriaWinner
Price FIFTY-FIFTY
Durability Tie
Versatility FIFTY-FIFTY
User Reviews FIFTY-FIFTY