Scores are relative 0–100 marks within this atlas. Use them to browse, not as an engineering spec.
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Quick answers
Which local authority or corridor rules matter for this type?
Start with the local lens: type approval, operator licences and the hubs named on this page — not a single global checklist.
Is this a buying guide?
No. Tool-Lifes /vehicles is an educational atlas. It explains history, systems and culture without affiliate rankings.
Are the scores official?
No. The six scores are relative editorial 0–100 marks across the 48 types on this site.
Where do the photos come from?
Lead images resolve from Wikimedia Commons via Wikipedia titles on the English masters, with licences recorded on the credits page.
Why metric units?
Metric is the default. Regional notes (US customary, local brand culture) appear in culture and market chapters.
How is this different from a wiki article?
Each type gets seven fixed-depth chapters, comparable scores and cross-type labs — structured for browsing, not a single freeform page.
Every Tuk-tuk is a negotiated stack of structure, energy conversion, control and human interfaces under weather and regulation.
The systems, meters and hotspots below are type-level engineering — manufacturers vary; load paths and failure modes do not.
Systems
Three-wheel chassis
Two rear driven wheels with single front steer wheel—or reverse delta layout—define tippiness and brake bias. Tubular or pressed steel frame carries body and engine.
Small displacement engine
Single-cylinder or twin two-stroke or four-stroke engines (100–200 cc) drive rear axle via chain or shaft. CNG conversions common in polluted cities.
Open or semi-closed body
Canvas roof, side curtains, and bench seat for 2–4 passengers; cargo variants drop seats for goods.
Handlebar or wheel steering
Older auto rickshaws use motorcycle handlebars; newer models adopt steering wheel and partial cabin.
Drum brake trio
Three drum brakes with mechanical or hydraulic linkages—no ABS on most fleets.
Meter & livery
Taximeter, roof sign, and municipal paint codes identify legal hire vehicles.
Relative meters
Hotspots
Kingpin / steer head
Wear causes shimmy and loss of directional control on delta layouts.
Chain stretch
Unmaintained chains skip sprockets under full passenger load on hills.
CNG tank certification
Expired cylinders force groundings in cities mandating alt fuel.
Clutch slip
Stop-go traffic glazes plates; heat builds in enclosed engine bays.
Frame fatigue
Welds at rear hitch crack on cargo overload common in informal use.
Materials
Thin-wall steel tubing
Low-cost frames prioritize repairability over crash structure.
Cast aluminum engine cases
Air-cooled singles minimize parts count for roadside mechanics.
Natural rubber mounts
Isolate vibration from passengers on hard seat benches.
CNG Type I steel tank
Heavy but cheap cylinder common on retrofit fleets.