Keep your bike shifting smooth and precise with the ZTTO Road Bike Shifter Height & Angle Adjust Kit + Derailleur Hanger Alignment Gauge Tool. Crafted from durable aluminum alloy with a sturdy 375g build, this multifunction tool is a must-have for any cyclist, bike shop, or DIY repair enthusiast.
Misaligned derailleur hangers are the #1 cause of poor shifting — and this tool makes it easy to measure, adjust, and realign your derailleur hanger with professional accuracy. The threaded design attaches directly into the derailleur hanger, while the gauge bar (made from heavy-gauge chrome-plated steel) rotates with the wheel at 3, 6, 9, and 12 o’clock positions to spot even the smallest alignment errors. With a quick adjustment of the arm, you can straighten the hanger and instantly re-check results.
Not just for hanger alignment, this kit also includes a road bike shifter height & angle adjust adapter nut — compatible with all major tail hook straighteners on the market — so you can fine-tune your shifter setup for optimal performance.
✨ Why Cyclists Love It:
Solves shifting problems, especially with index systems
Heavy-duty, precise tool for bike mechanics and riders alike
Fits wheel sizes from 20" to 29"+ for maximum versatility
Replaceable threaded tip + upgraded inner shaft for durability
Works with thru-axle frames and low-clearance hangers
Adapter nut available for shifter height & angle adjustment
Perfect for road bikes, gravel bikes, and mountain bikes — whether you’re a home mechanic or a professional shop, the ZTTO Alignment Gauge Tool ensures your drivetrain runs flawlessly.
