Wheels Manufacturing Dropout 308
Dropout 308
Dropout 308
Wheels Manufacturing

Wheels Manufacturing Dropout 308

$37.50
In Stock

Direct OEM-spec replacement derailleur hanger for a wide range of Niner frames with 12mm thru-axles. CNC-machined aluminum construction for precise alignment and durability.

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Product Details

Overview & technology

Wheels Manufacturing Dropout 308 (Manufacturer Part #: DROPOUT-308, Product #: 270802) is a precision replacement derailleur hanger made to restore shifting accuracy on compatible Niner frames. Designed as a bolt-on, direct OEM-spec replacement, it sits in the dropout where it protects your frame and drivetrain from damage in a crash or impact. This hanger is precision CNC-machined from 6061-T6 aluminum and finished with a corrosion-resistant hard anodize for long life in trail conditions. The 12mm thru-axle interface and tight manufacturing tolerances give a stable, repeatable mounting point for your derailleur — the real-world result is crisper shifts, reduced chain-suck and predictable gear indexing mile after mile.

Key features & benefits

Built for durability and easy replacement: The Dropout 308 uses precision machining to match Niner's dropout geometry, so installation is straightforward and alignment is consistent. The lightweight design (approx. 0.1 lb) keeps rotating mass minimal while providing a sacrificial failure point to protect your frame. • CNC-machined 6061-T6 aluminum for strength and precise tolerances. • Hard-anodized finish resists corrosion and abrasion from trail grit. • Direct OEM fit for multiple Niner models — replaces the original hanger without modification.

Fit, compatibility & installation

The Dropout 308 is specifically compatible with a broad set of Niner models: AIR (All), AIR 9 Alloy & Carbon (All), BSB 9 (All), JET (All), JET Alloy & Carbon (All), ONE 9 RDO (All), RIP (All), RIP Alloy & Carbon (All), RKT (All), RLT 9 Alloy (All), RLT RDO (All), and WFO 9 (All). It is intended for frames that use a Niner-specific #308 hanger with a 12mm thru-axle. Installation is a simple bolt-on job. Use the manufacturer torque spec for the hanger bolt, clean and lightly grease the threads to prevent seizing, and check derailleur alignment with a hanger alignment tool after installation. If you're unsure which hanger your frame uses, compare part numbers or contact Forest Bikes with your frame model and year.

Who this hanger is for

This is the right part for Niner owners who need a reliable, accurate replacement derailleur hanger that restores factory shifting geometry. It's ideal for trail and all-mountain riders who want a lightweight, dependable sacrificial part to protect their frame and drivetrain. If you ride aggressively, frequently swap wheels, or have repaired after a crash, keeping a Dropout 308 on hand is a smart move — it’s an inexpensive insurance policy that gets you back on the trail fast with OEM fit and function.

Key Features

  • ✓ Direct OEM-spec replacement for Niner frames with #308 hanger
  • ✓ Precision CNC-machined 6061-T6 aluminum construction
  • ✓ Corrosion-resistant hard-anodized finish for trail durability
  • ✓ Designed for Niner 12mm thru-axle dropouts and stable shifting
  • ✓ Lightweight — approx. 0.1 lb keeps rotating mass low
  • ✓ Restores factory derailleur alignment after impacts or crashes
  • ✓ Fits AIR, WFO, RIP, RLT RDO, JET, ONE 9 RDO and more

Specifications

Misc #308, Niner 12mm Thru Axle

Product Identifiers

Vendor Item # DROPOUT-308
UPC 811079024367

Frequently Asked Questions

Which Niner models does the Dropout 308 fit?

The Dropout 308 fits many Niner frames that use the #308 hanger with a 12mm thru-axle, including AIR (All), AIR 9 Alloy & Carbon, BSB 9, JET (All), ONE 9 RDO, RIP (All), RKT (All), RLT 9 Alloy, RLT RDO and WFO 9. Confirm your frame's hanger number or contact Forest Bikes if you're unsure.

Is hardware included with the hanger?

Check the product listing on Forest Bikes for included items. If no bolt is listed, reuse your existing mounting bolt or source the correct stainless steel bolt to manufacturer torque specs. Always apply light anti-seize or grease to threads during installation.

Can I straighten a bent hanger instead of replacing it?

Minor bends can sometimes be corrected with a hanger alignment tool, but if there's any doubt about the hanger's integrity or if threads/dimensions are damaged, replacement is recommended. The Dropout 308 is an inexpensive way to restore precise shifting and protect your frame.

How do I install the Dropout 308?

Installation is a bolt-on procedure: remove wheel and derailleur if needed, swap the hanger into the dropout, torque the mounting bolt to the frame manufacturer's spec, reinstall the derailleur and check indexing. Finish by verifying derailleur hanger alignment with an alignment gauge.

Will this hanger work with a 142x12 or Boost axle?

The Dropout 308 is intended for Niner frames using a 12mm thru-axle and the #308 hanger geometry. If your frame uses Boost spacing or a different axle spec, confirm compatibility by matching the hanger number or consulting Forest Bikes support.

What material is the hanger made from and how durable is it?

This hanger is CNC-machined from 6061-T6 aluminum with a hard-anodized surface for corrosion and wear resistance. It’s designed as a sacrificial component — strong in normal use but engineered to bend or shear instead of damaging the frame in an impact.

Buying Guide

When buying a replacement derailleur hanger, the most important factors are fit and alignment. Always identify the hanger number stamped on your old part or consult your frame's manual — a correct match (like the Dropout 308 for many Niner models) guarantees OEM geometry and straightforward installation. Consider material and finish: CNC-machined 6061-T6 aluminum hangers with hard-anodize deliver a good balance of strength, weight and corrosion resistance. Keep a spare on hand if you ride aggressively or travel; replacing a bent hanger is far quicker and cheaper than repairing a mis-shifted drivetrain or damaged frame.

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