Introduction
“Tank-to-Wheel” (TTW) refers to the analysis of a vehicle’s performance from the moment fuel is stored onboard to when it is used to power the wheels. It’s one half of the full “Well-to-Wheel” (WTW) lifecycle assessment.
🔗 Read more – IEA: Tracking Transport
🧠 What It Means
TTW focuses only on the energy conversion and emissions that occur inside the vehicle.
It’s useful for comparing different vehicle types (hydrogen, electric, diesel).
Does not account for upstream emissions like fuel production or delivery.
❗ Key Challenges
Can misrepresent total environmental impact.
Needs to be combined with Well-to-Tank data to provide full picture.
Assumes fuel is already onboard, ignoring the cost or emissions of getting it there.
🦁 Muzaffar’s Comment
“People hear ‘zero emissions’ and think that’s the whole story. TTW is just the final chapter—we’ve got to look at the whole book.”
🦉 Sameer’s Comment
“I thought hydrogen cars were clean full stop—TTW helped me realise it’s just one slice of the puzzle.”
