Wheels Manufacturing Dropout 143
Dropout 143
Dropout 143
Wheels Manufacturing

Wheels Manufacturing Dropout 143

In Stock

Direct-fit replacement derailleur hanger for Scott Addict frames (#143). CNC-machined 6061-T6 alloy restores alignment and shifting with minimal weight.

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Product Details

Dropout 143 Overview & Technology

Wheels Manufacturing Dropout 143 (DROPOUT-143) is a purpose-built derailleur hanger engineered as a direct replacement for Scott Addict road frames. Manufactured to match the original hanger geometry, this part restores the precise mounting location and derailleur alignment that modern drivetrains require. The hanger is CNC-machined from high-grade 6061-T6 aluminum and finished with a corrosion-resistant anodize for long-term durability. At just 0.03 lb and compact shipping dimensions, it’s lightweight and unobtrusive while delivering the strength and machined tolerances needed to keep shifting crisp and reliable.

Key Features & Benefits

Designed for accuracy. The Dropout 143 is produced to tight CNC tolerances so the derailleur sits exactly where the manufacturer intended—minimizing indexing errors and chain rub after installation. Real-world benefits include: • Exact fit for Scott Addict frames: Matches the #143 mounting pattern for plug-and-play replacement. • 6061-T6 alloy construction: Lightweight, stiff and resistant to fatigue for long service life. • Anodized finish: Improves corrosion resistance where road conditions are harsh. • Protects your frame: Designed as the sacrificial component to fail or bend instead of damaging the frame and derailleur.

Fit, Installation & Compatibility

The Dropout 143 is a frame-specific hanger that fits Scott Addict models using the #143 hanger pattern. Before ordering, check your frame’s hanger number stamped on the frame or compare the shape to manufacturer parts lists—this product is sold as DROPOUT-143 (Wheels Manufacturing part #270427). Installation is straightforward for any home mechanic or shop: remove the damaged hanger, align the new hanger to the frame’s mounting bosses and secure with the original or equivalent mounting bolt. Basic tools (hex keys or Torx depending on your bike) are all that’s required. If you’re unsure about fit or if your bike uses a thru-axle mount or integrated hanger design, contact us or your local dealer for confirmation before purchase.

Who the Dropout 143 Is For

This hanger is ideal for road cyclists who own a Scott Addict frame and need a precise, OE-style replacement to restore shifting performance after a crash or wear. It’s also a practical spare for mechanics and bike shops—lightweight to carry and quick to swap roadside. If you ride aggressively or frequently travel with your bike, keeping a Dropout 143 in your toolkit or saddle bag gives you a fast recovery option to avoid a long walk home and keeps your drivetrain functioning as intended.

Key Features

  • ✓ Direct replacement for Scott Addict frames using #143 hanger pattern
  • ✓ CNC-machined 6061-T6 aluminum for precision and long-term strength
  • ✓ Anodized finish for corrosion resistance in wet riding conditions
  • ✓ Lightweight — only 0.03 lb, won’t add noticeable weight to your bike
  • ✓ Restores derailleur alignment and indexing after impact
  • ✓ Compact part (shipping dims 3" x 3" x 0.3") — easy to carry spares

Specifications

Misc #143, Scott

Product Identifiers

Vendor Item # DROPOUT-143
UPC 836572006795

Frequently Asked Questions

How do I know if Dropout 143 fits my bike?

Check your frame model—Dropout 143 is specified for Scott Addict frames using the #143 hanger pattern. You can verify by comparing the hanger shape to the original or checking your bike’s parts list. If in doubt, contact Forest Bikes with your frame serial or photos of the existing hanger mount.

Is mounting hardware included with the hanger?

Hangers are often sold as the replacement part only; mounting bolts may or may not be included depending on the retailer. If you don’t have the original bolt, a suitable stainless or grade-appropriate replacement is recommended. Contact us if you need hardware options.

Can I bend the hanger back instead of replacing it?

Minor bends can sometimes be straightened with a derailleur hanger alignment tool, but repeated straightening weakens the part and risks poor shifting. Because hangers are inexpensive and designed to be sacrificial, replacement is usually the safest option for precise shifting.

Will this work with mechanical and electronic drivetrains?

Yes. The Dropout 143 restores the correct mounting location for both mechanical and electronic rear derailleurs. Proper alignment is essential for electronic shifting reliability, so replace any bent hanger before troubleshooting other components.

Can I install this at home, or should a shop do it?

Most home mechanics can replace a hanger with basic tools (hex/Torx keys). After installation, check derailleur alignment and indexing; if you’re unsure, a quick tune-up at a shop will ensure correct tension and limit screw settings.

Buying Guide

When choosing a derailleur hanger, match the hanger pattern number to your frame (in this case #143 for Scott Addict) rather than guessing by bike brand alone. Look for CNC-machined 6061-T6 or equivalent materials for a balance of strength and weight, and prefer anodized finishes for corrosion protection if you ride in wet conditions. Keep a spare hanger in your repair kit—replacing a bent hanger is quick and inexpensive compared with repairing a damaged frame or bent derailleur. If you’re unsure about compatibility, provide photos or your frame serial to seller support to confirm fit before purchase.

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