Wheels Manufacturing Dropout 27
Direct-fit replacement derailleur hanger CNC-machined from 6061 aluminum with a black anodized finish. Designed for #27 frames (Jamis, Marin, Mongoose, Schwinn) and ships with an M8 chainring bolt.
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Overview & Technology
Key Features & Benefits
Fit, Compatibility & Specifications
Who This Hanger Is For
Key Features
- ✓ CNC-machined 6061-T6 aluminum for accurate alignment and light weight
- ✓ Black anodized finish provides corrosion and abrasion resistance
- ✓ Direct-fit replacement for Jamis, Marin, Mongoose and Schwinn frames
- ✓ Includes one M8 chainring bolt for easier reassembly after install
- ✓ Small, lightweight part — perfect as a carry-along spare on rides
- ✓ OEM-style tolerances minimize derailleur misalignment and shifting issues
- ✓ Compact shipping size: 3 x 3 x 0.4 inches, weighs 0.05 lb
Specifications
Product Identifiers
Frequently Asked Questions
How do I know if Dropout 27 fits my bike?
Compare the shape and mounting hole pattern of your existing hanger to the Dropout 27 or check your frame’s parts diagram for hanger #27 compatibility. This hanger is known to fit select Jamis, Marin, Mongoose and Schwinn frames — if in doubt, measure hole spacing and drop out profile.
Can I install this hanger myself?
Yes — installation is straightforward for any home mechanic with basic tools. Remove the rear wheel, unbolt the old hanger, align the new hanger to the dropout and torque fasteners to the frame manufacturer’s spec. If there’s any doubt about alignment, have a shop check hanger straightness for optimal shifting.
Is the included M8 chainring bolt the only fastener provided?
The Dropout 27 includes one M8 chainring bolt as noted by the manufacturer. It does not include all frame mounting bolts in every case, so retain or replace any frame-specific hardware as needed.
What are the advantages of 6061-T6 aluminum for a hanger?
6061-T6 balances strength, stiffness and light weight. It provides predictable bending (sacrificial behavior) in impacts, protecting the derailleur and frame. The alloy also machines cleanly for tight tolerances and anodizes well to resist corrosion.
How should I tighten the hanger bolts and derailleur?
Use a torque wrench when reinstalling to the torque values recommended by your frame and component manufacturers. Over-tightening can distort the hanger or strip threads; under-tightening risks movement and poor shifting.
Can I use this hanger on eMTBs or high-torque e-bikes?
Dropout 27 is intended for the compatible OEM frames listed. For high-torque e-bikes consult the frame maker: e-bike loads are higher and sometimes require reinforced hangers specifically designed for e-assist use.
Buying Guide
When choosing a replacement derailleur hanger, prioritize direct-fit compatibility first — the exact hole pattern and profile determine alignment and shifting performance. Materials like 6061-T6 aluminum are common because they balance light weight and predictable deformation in a crash, which can save more expensive parts. Keep a spare hanger in your toolkit if you ride aggressively or travel remote trails. A compact, lightweight hanger such as the Dropout 27 is easy to stow in a saddlebag and can get you back on the trail quickly after an impact.
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