FISCHER Bicycle Seatpost Kerze steel Ø 25.4 mm, length 350 mm, compatible reducer sleeves available

FISCHER Kerze is a steel bicycle seatpost with a 25.4 mm diameter and 350 mm length, designed to mount and adjust the saddle height on bicycles that require a 25.4 mm post. The post is made of steel for stable support and is supplied as a single unit. Optional compatible reducer sleeves (article 85642) allow the seatpost to be used in frames or seat clamps with larger diameters or different tolerances.

Advantages

The steel construction provides robust support and resistance to bending under normal riding loads while maintaining straightforward installation and maintenance. The standard 25.4 mm diameter meets common bicycle specifications, and the 350 mm length offers sufficient insertion depth and saddle height adjustment range for many city, trekking and vintage bicycles. Compatibility with optional reducer sleeves increases versatility when adapting the seatpost to frames with slightly larger seat tubes.

Suitable for

• Bicycles that require a 25.4 mm diameter seatpost.
• City and commuting bikes with moderate saddle height adjustment needs.
• Trekking, touring or vintage bikes where a steel post is preferred for durability.
• Frames that can accept a 350 mm long seatpost with adequate insertion depth.

When it may not be suitable

This steel seatpost may be heavier than modern aluminium or carbon alternatives, so it may not suit riders prioritizing minimal weight. It is a straight 25.4 mm post; without the optional reducer sleeves it will not fit frames designed for larger or smaller diameters.

Key specifications

• Material: steel
• Diameter: 25.4 mm
• Length: 350 mm
• Finish: painted/coated steel surface
• Mounting: standard single-piece seatpost for clamp-style saddle rails

How to use

Insert the seatpost into the frame's seat tube to the minimum insertion mark or until sufficient insertion depth is achieved, then align the saddle and tighten the seatpost clamp to the torque recommended by the bicycle or clamp manufacturer. If the frame's seat tube has a larger diameter, install a compatible reducer sleeve (art. 85642) before inserting the post. Regularly check clamp tightness and the post for corrosion; apply light grease or anti-seize compound to the post if required by the frame material to prevent seizing.

What to consider before purchase

• Measure the internal diameter of your frame's seat tube to confirm 25.4 mm compatibility or the need for a reducer sleeve.
• Verify required insertion depth to ensure the 350 mm length provides safe clamping and saddle height range.
• Consider whether a steel post meets your weight and corrosion resistance preferences compared with aluminium or carbon options.

Usage recommendations

Use the FISCHER Kerze seatpost with a correctly sized seat-clamp and, where applicable, with the optional reducer sleeve (art. 85642). Tighten clamps to the manufacturer-recommended torque, and perform periodic inspections for secure fastening and surface condition to ensure safe and reliable saddle support.