RISK RL257/RL258 Bike Saddle Height Measuring Tools – Seat Height Marker & Bottom Bracket Center Locator for Accurate Bicycle Fit

The RISK RL257/RL258 Bike Saddle Height Measuring Tools are designed to help cyclists, mechanics, and bike fit enthusiasts measure and record saddle height more accurately and efficiently. Whether you are adjusting your own bike setup, switching saddles, or maintaining multiple bicycles, these compact tools make saddle height measurement easier, faster, and more repeatable.

Available in three options:

• 1: RL257 Seat Height Marker Tool
• 2: RL258 Bottom Bracket Center Locator Tool
• 3: RL257 Seat Height Marker Tool + RL258 Bottom Bracket Center Locator Tool Set

Made with a lightweight polymer material and produced using a 3D printing process, these tools are compact, easy to carry, and convenient for workshop or home use.

Key Features

Accurate Saddle Height Measurement

The RL257 seat height marker works with a measuring tape to help locate and mark the saddle reference point, making it easier to measure saddle height from the bottom bracket area to the saddle.

Bottom Bracket Center Positioning

The RL258 bottom bracket center locator helps identify the center point of the bottom bracket axle area, providing a more consistent measuring reference when checking saddle height.

Magnetic Design for Easy Use

The RL258 locator is equipped with a magnet, allowing it to attach securely to a steel measuring tape. This helps reduce slipping and makes measurement more convenient.

Lightweight & Portable

Both tools are small and lightweight, making them easy to store in a toolbox, workshop drawer, bike fitting kit, or travel tool bag.

Practical for Bike Fit Adjustments

Ideal for saddle replacement, bike fitting, seatpost height adjustment, and recording your preferred riding position.

3D Printed Polymer Construction

Made from high-polymer material using 3D printing technology. Layer lines or seam marks may be visible due to the production process and do not affect normal use.

Specifications

 RL257 Seat Height Marker Tool

• Product Name: Seat Height Marker Tool
• Model: RL257
• Brand: RISK
• Size: Approx. 80 × 40 × 10 mm
• Net Weight: Approx. 12.6 g
• Gross Weight: Approx. 14.6 g
• Package Size: Approx. 164 × 100 × 10 mm
• Packaging: RISK branded bag

 RL258 Bottom Bracket Center Locator Tool

• Product Name: Bottom Bracket Center Locator Tool
• Model: RL258
• Brand: RISK
• Size: Approx. 33 × 18 mm
• Net Weight: Approx. 9.4 g
• Gross Weight: Approx. 10.8 g
• Package Size: Approx. 100 × 80 × 20 mm
• Packaging: RISK branded bag

RL257 + RL258 Tool Set

• Product Name: Seat Height Marker Tool + Bottom Bracket Center Locator Tool
• Models: RL257 + RL258
• Brand: RISK
• Size: Approx. 80 × 40 × 10 mm + 33 × 18 mm
• Net Weight: Approx. 22 g
• Gross Weight: Approx. 24.5 g
• Package Size: Approx. 164 × 100 × 10 mm
• Packaging: RISK branded bag

How to Use

1. Attach or position the RL258 bottom bracket center locator at the bottom bracket area.
2. Place the measuring tape on the locator to establish a center reference point.
3. Use the RL257 seat height marker on the saddle to locate the saddle measuring point.
4. Measure the distance from the bottom bracket center to the saddle reference point.
5. Record your saddle height for future adjustment or bike fitting reference.

Package Options

Option 1

1 × RISK RL257 Seat Height Marker Tool

Option 2

1 × RISK RL258 Bottom Bracket Center Locator Tool

Option 3

1 × RISK RL257 Seat Height Marker Tool
1 × RISK RL258 Bottom Bracket Center Locator Tool

Notes

• Measuring tape, bicycle, saddle, and other display items are not included.
• Manual measurement may result in slight size or weight differences.
• Due to the 3D printing process, minor layer lines, texture marks, or seams may appear. These are normal production characteristics and do not affect performance.
• Product color may vary slightly due to lighting and screen settings.