8TEN Flat Idler Pulley for Exmark Toro 50 54 inch Deck Quest E-Series S-Series Timecutter 106-2175 3 Pack

What It Is

This is a set of three flat idler pulleys (OEM reference 106-2175) designed to guide and tension the drive belt on 50- and 54-inch Exmark and Toro zero-turn mower decks. They’re a common wear item that keeps the belt tracking correctly and prevents slipping or premature belt failure.

Fitment & Compatibility

Check these before buying:

• Deck size: Fits 50-inch and 54-inch fabricated decks only. Not for 42-inch, 48-inch, or stamped decks.
• Brands/models: Exmark Quest, S-Series, E-Series; Toro TimeCutter, Z-Master, and Groundsmaster with compatible decks.
• OEM cross-reference: Replaces Toro 106-2175, 110-4561, 110-4562, and Exmark 103-4196.
• Measurements: Pulley is 4.0 inches outer diameter, 0.5-inch bore (bearing inner diameter), and uses a 3/4-inch-wide belt. Verify your existing pulley matches these specs.
• Bearing type: Sealed ball bearing – no grease zerk. If your old pulley has a zerk, this is a different style and may not fit.

Key Things to Know

• Quality vs. OEM: These are aftermarket but use sealed bearings and a steel hub. Most users report they last as long as OEM at a lower per-pulley price.
• Installation difficulty: Easy – remove the belt, unbolt the old pulley (usually a 5/16” hex or 1/2” socket), install new one, and re-tension the belt. No special tools needed.
• Common gotchas:
  • The pulley is flat-faced, not grooved. Make sure your deck uses flat idlers (most Exmark/Toro 50-54” decks do).
  • Check that the belt isn’t already damaged – a worn pulley can cause belt fraying. Replace both if needed.
  • The 3-pack gives you one spare – keep it for future replacement.
• Noise: Some users report slight bearing noise initially, but it usually quiets after a few hours of use.

Should You Buy It

If you own a 50- or 54-inch Exmark or Toro zero-turn with a flat idler pulley and need a cost-effective replacement, this 3-pack is a solid choice. It’s easy to install, matches OEM specs, and the spare pulley makes future maintenance convenient. Avoid if your deck uses a grooved or smaller pulley.