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hammer-ebikes MTX39 Wheel Rim Review: Built for downhill and e-bike loads

MTX39 DOUBLE WALL Downhill ebike Wheel Rim 29" 36 HOLE Black
4.6
[29-inch MTX Rim]  Durable 29-inch rim engineered for stable rides across varied terrains.
[36-Spoke Compatibility]  Optimized for 36-spoke wheel builds, ensuring strength and balanced load distribution.
[12G Spoke Ready]  Works with 12G spokes for robust, long-lasting wheel assemblies.
[All-Terrain Performance]  Built to handle downhill and trail conditions with dependable stability.
[Cargo & Delivery Ready]  Supports heavy loads and frequent use for reliable courier and cargo cycling.
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Automotive wheel component built to handle e-bike and downhill stresses, the hammer-ebikes MTX39 Wheel Rim promises robust performance. Confident riders and cargo couriers get peace of mind from strength suited to heavy loads and trail impacts. Does the construction and spoke compatibility match your build requirements?

⚡ At a Glance
  • Rim Construction: Double wall design compatible with 36 spokes and 12G spokes, aimed at e-bike, downhill, tandem and delivery use
  • Best for: Riders needing robust rims for heavy-duty e-bikes, downhill runs, tandems or cargo and delivery duties
  • Not ideal for: Lightweight road racing or cross-country use where minimal rotational mass is the priority

Double wall 29-inch rim built for 36-spoke wheel builds and compatible with 12G spokes. Suited to e-bike, downhill, tandem and delivery applications.


Greater Load Durability – Thanks to Double-Wall Construction

Two parallel rim walls form a stiffer cross-section that resists compression and reduces the chance of dents during impacts. The increased section depth spreads impact forces across more material.

Enables wheel builds that tolerate heavy rider weight, cargo and hard landings with fewer occurrences of rim deformation.

Stable Wheel Builds – With 36-Spoke Compatibility

A 36-hole pattern distributes spoke tension across more attachment points, lowering the load on individual spokes and the rim bed. This configuration reduces the likelihood of spoke failure under sustained stress.

Supports stronger, longer-lasting wheels well suited to the higher torque and sustained loads common on e-bikes and downhill riding.

Easy Maintenance and Replacement – With 12G Spoke Compatibility

Designed to accept 12G spokes, a commonly used gauge that is widely available and straightforward to work with in most workshops. Wheel builders can use standard nipples and spokes for repairs.

Simplifies sourcing replacements and keeps workshop time to a minimum for couriers, commuter cyclists and remote riders.

✨ The 4 Key Reasons for hammer-ebikes MTX39 Wheel Rim
  1. Double-wall construction – Improves resistance to impacts and maintains rim shape
  2. 36-hole pattern – Allows stronger, evenly distributed spoke tension for durable wheels
  3. 12G compatibility – Uses common spoke size for easy sourcing and replacement
  4. 29-inch diameter – Better rollover over obstacles and retains momentum on rough trails
📋 Technical Details at a Glance
  • Category: Automotive Parts and Accessories
  • Brand: hammer-ebikes
  • Model: MTX39
  • Rim Diameter: 29 inch
  • Hole Count: 36
❓ Frequently Asked Questions

Q: Is the rim compatible with 12G spokes?

A: Yes, compatibility with 12G spokes is specified in the product description.

Q: How many spoke holes does the rim have?

A: The rim has a 36-hole pattern intended for 36-spoke wheel builds.

Q: What types of riding is the rim intended for?

A: Designed for e-bikes, downhill, tandem and delivery use according to the product description.

🏆 Our Verdict

Suitable for riders who need robust wheel builds for e-bikes, downhill runs, tandems or cargo and delivery duties. Double-wall construction combined with 36-hole layout and 12G compatibility delivers strength and straightforward maintenance. Durability and compatibility translate into long-term value for heavy-use cyclists who want fewer repairs and reliable wheel performance.