The ROP Shop FUEL CAP fits Troy-Bilt TB 100 (2020 & 2022) TB 105B (2022) TB 110 (2020 & 2022)

What It Is

This is a replacement fuel cap for specific Troy-Bilt TB series lawn mowers, designed to seal the fuel tank to prevent leaks and evaporation during operation and storage. It fits models from the 2020 and 2022 production years.

Fitment & Compatibility

Check your mower’s model number (e.g., TB 100, TB 105B, TB 110) and the year of manufacture—this cap is only confirmed for 2020 and 2022 versions of these models. Measure your existing cap’s outer diameter and thread pitch (common Troy-Bilt caps are ~1.5 inches wide with a fine thread). This is an aftermarket part, not OEM Troy-Bilt, so it may differ slightly in plastic color or vent design. Verify the cap is vented or non-vented based on your mower’s original cap (most TB series use a vented cap). If your mower has a different year or model suffix (e.g., TB 110 XP), it likely won’t fit.

Key Things to Know

• Quality: Rated 3.9/5 from 20 reviews—some users report a good seal, others note it may feel slightly loose or require extra tightening.
• Installation: Tool-free—simply twist off the old cap and screw on the new one. No special skills needed.
• Gotcha: The aftermarket plastic may be less durable than OEM; avoid overtightening to prevent cracking. Check for a rubber gasket inside—if missing, the cap won’t seal properly.
• Venting: If your mower’s original cap has a small hole or vent lever, ensure this replacement matches. A non-vented cap on a vented system can cause fuel flow issues.

Should You Buy It

Buy this cap if you own a 2020 or 2022 Troy-Bilt TB 100, TB 105B, or TB 110 and need a quick, low-cost fix for a lost or leaking cap. It’s a decent budget alternative to OEM, but if you want guaranteed fit and better long-term durability, spend a few dollars more for an OEM Troy-Bilt cap. Skip it if your mower is outside the listed years or models.