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Laser Rear Derailleur Alignment Tool – World's First Laser-Powered Derailleur Hanger Alignment, Fits 7–12 Speed, Allen & Torx Mount, Precision Shifting in Minutes

Name: Laser Rear Derailleur Alignment Tool – World's First Laser-Powered Derailleur Hanger Alignment, Fits 7–12 Speed, Allen & Torx Mount, Precision Shifting in Minutes
Brand: mysite
Price: 42.99 USD
Availability: InStock

$42.99 USD

Kiekis

Precision Laser Alignment Tool

Set Every Gear. True To The Line.

Whether you're a professional mechanic, a first-time home mechanic or a racer chasing a perfect shift — the Linientreu mounts straight onto your rear derailleur bolt and projects a precision laser line, so you set lower and upper stops in minutes. No guessing. No eyeballing.

See How It Works

Linientreu laser derailleur alignment tool with green handle

Product Overview

Setting The Circuit
Is Child's Play.

Born from an obsession with precision, the Linientreu makes rear derailleur setup easy for everyone — professional, beginner or mechanic. Attach it to the derailleur mounting bolt with an Allen or Torx key, and let the precision laser show you exactly where the lower and upper stops belong. Patented, hand-built in Germany and true to the line — every time.

7–12

Speed Compatible

Works with all 7-, 8-, 9-, 10-, 11- and 12-speed rear derailleurs, old or new.

466 g

Precision In A Light Package

Machined from 7075 aluminium with steel components — workshop sturdy, toolbox light.

Bits Included

Ships with a T25 Torx bit and a 5 mm Allen bit, each 25 mm long, to mount on the derailleur bolt.

Product Features

Laser Precision, Not Guesswork

True-To-The-Line Laser

The integrated linear laser beams straight onto the pulley wheel and sprocket, so alignment is measured — never eyeballed.

Fits 7–12 Speeds

Compatible with 7-, 8-, 9-, 10-, 11- and 12-speed rear derailleurs across road, mountain and gravel drivetrains.

Allen Or Torx Mounting

Fixes onto the rear derailleur mounting bolt with the included 5 mm Allen or T25 Torx bit.

Upper & Lower Stop Control

Adjust both derailleur limit stops with laser-guided precision for crisp, quiet shifting.

Checks The Hanger

The projected line shows you at a glance whether the derailleur hanger is straight — before you start riding.

Hand-Built In Germany

Machined from 7075 aluminium and finished by hand in Germany's Black Forest.

Using the Linientreu to adjust a rear derailleur

How It Works

Mount The Tool

Attach the Linientreu to the rear derailleur mounting bolt using the included 5 mm Allen or T25 Torx bit.

Switch On The Laser

Activate the precision line laser — it projects a clear reference line onto the pulley wheel and sprocket.

Set Your Stops

Adjust the lower and upper derailleur stops until the line runs exactly true, and check the hanger at a glance.

Ride In Gear

Every shift is crisp and precise — no wheel removal, no guessing by eye.

Designed For Precision

Laser Precision.
Hand-Built In Germany.

Made from 7075 aluminium with steel fasteners, the Linientreu is manufactured by hand in Germany. A patented line-true system, a linear laser display and universal 7–12 speed compatibility make it the cleanest way to set a rear derailleur — at home or in the workshop.

Built For

One Laser Tool.
Every Derailleur Setup.

Home Mechanics

Pro Workshops

Road Bikes

Mountain Bikes

Race Day Pits

Travel Toolbox

7–12 Speed Drivetrains

Bike Shops

Explore The Design

Always True To The Line

The linear laser projects a precise reference line onto the pulley wheel and sprocket, replacing guesswork with a clear visual target for lower and upper stop adjustment.

Allen Or Torx, In Seconds

Fix the tool via the 5 mm Allen or T25 Torx bit on the rear derailleur mounting bolt. The holder accepts all standard 1/4-inch bits, so you can add sizes such as a T27 for Campagnolo.

Precision Materials

Machined from 7075 aluminium with steel components, the Linientreu is precision-engineered and hand-finished in Germany.

7 To 12 Speeds

Designed for 7-, 8-, 9-, 10-, 11- and 12-speed rear derailleurs — from classic road groupsets to the latest 12-speed drivetrains.

Product Specifications

Specifications

Intended UseFine Adjustment Of Bicycle Derailleurs

LaserPrecision Linear Laser

MaterialAluminium 7075 & Steel

WeightApprox. 466 g

Compatibility7 · 8 · 9 · 10 · 11 · 12-Speed Rear Derailleurs

Mounting5 mm Allen Or T25 Torx On Derailleur Bolt

Included BitsT25 Torx + 5 mm Allen, 25 mm Each

Bit HolderAccepts Standard 1/4-Inch Bits

Extra BitsAdditional Sizes Supported (e.g. T27)

Hanger CheckLaser Line Shows Straightness

OriginHand-Made In Germany

CertificationPatented Design

Package Includes

Everything Needed To Get Started

1 × Linientreu Laser Alignment Tool

1 × Torx T25 Bit (25 mm)

1 × 5 mm Allen Bit (25 mm)

Linientreu tool with included bits and accessories

Good To Know

Frequently Asked Questions

No. The Linientreu is designed for professionals, beginners and mechanics alike — attach it, switch on the laser and follow the line.

All 7-, 8-, 9-, 10-, 11- and 12-speed rear derailleurs. It mounts on the rear derailleur fastening bolt with a 5 mm Allen or T25 Torx bit.

The integrated precision laser projects a straight line onto the pulley wheel and sprocket, letting you set the lower and upper stops accurately — and check whether the hanger is straight.

A T25 Torx bit and a 5 mm Allen bit, each 25 mm long. The holder accepts standard 1/4-inch bits, so additional sizes such as a T27 for Campagnolo work too.

7075 aluminium with steel components, hand-finished in Germany.

Yes — the Linientreu is compatible with rear derailleurs from 7 to 12 speeds, covering road, mountain and gravel drivetrains.

Precision Made Simple

TRUE TO THE LINE.
EVERY TIME.

Stop guessing your gear changes. Mount the Linientreu, follow the laser line and set your derailleur with workshop precision — in minutes, at home or in the pits.

Explore The Full Product

Patented · Hand-Built In Germany · Fits 7–12 Speed Derailleurs