Galvanized Axle 4x105 mm vs 4x120 mm: Which Fits Your Build
By eitech Metallbaukasten | Published: 2026-10-18
Category: Comparisons
Compare the eitech Axle 4x105 mm professional and Axle 4x120 mm profile. Learn which length suits your model based on clearance, fit, and structural needs.
Quick answer
Choose the 4x105 mm axle for tight, compact builds where every millimeter counts, and the 4x120 mm axle when you need extra clearance for moving parts or wider frames.
Length matters: clearance vs compactness
The main difference between these two galvanized axles is their length. The 4x105 mm professional axle is shorter, making it ideal for smaller models or sections where you need a snug fit without excess overhang. The 4x120 mm profile axle gives you an extra 15 mm, which can be crucial for accommodating wheels, gears, or brackets that require additional spacing.
Both axles share the same 4 mm diameter and galvanized finish, so corrosion resistance and compatibility with standard eitech parts are identical. Your choice comes down to the physical space inside your build.
When 15 mm makes a difference
In model building, even a small length difference can affect stability and function. The 4x105 mm axle works well for fixed axles in narrow chassis or as a support rod where you don't want protruding ends. The 4x120 mm axle suits applications like steering linkages, wheel mounts, or any spot where parts need to slide or rotate freely without binding.
If you're replacing an existing axle, measure the original part or the distance between mounting points. Using a longer axle than needed can cause interference, while a shorter one may not provide enough thread or shoulder for fasteners.
Trade-offs at a glance
- 4x105 mm: compact and precise: Best for tight spaces where a shorter axle prevents interference. Ideal for fixed axles in small chassis or as a support rod. Measure the distance between mounting points first to ensure a snug fit.
- 4x120 mm: extra clearance: Suited for builds with wheels, gears, or brackets that need room to move. The longer length also helps distribute load over a wider span. Check that the extra mm won't cause the axle to protrude into other components.
- Same finish, same compatibility: Both axles are galvanized and share the same 4 mm diameter, so they work with standard eitech hubs, brackets, and connectors.
Product facts
- Axle 4x105 mm professional, galvanized: The eitech Axle 4x105 mm professional is a galvanized axle from the Manufaktur range, SKU 01359P. Its shorter length fits compact builds where space is limited, reducing the need for trimming or extra spacers.
Axle 4x105 mm professional, galvanized - Axle 4x120 mm profile, galvanized: The eitech Axle 4x120 mm profile is a galvanized accessory from the Manufaktur range, SKU 01357P. The extra 15 mm provides clearance for moving parts or wider assemblies, making it versatile for larger models.
Axle 4x120 mm profile, galvanized
Which axle should you choose?
Best for
- Compact models where every millimeter of clearance is tight
- Fixed axles or support rods that don't require extra overhang
Not ideal for
- Builds that need extra spacing for wheels, gears, or moving linkages
- Applications where a longer axle provides better load distribution
