Zero SR/S tires
The Zero SR/S runs one fitment, 120/70 R17 58W. It is staggered: a 120 section at the front and a 180 at the back, so the two can never be swapped across axles and the rear goes first. The Energica Ego takes the same size.
Every fitment
| Generation | Trim | Wheel | Tire size | Load index | Speed | Construction | Marking | Pressure |
|---|---|---|---|---|---|---|---|---|
| Current | SR/S and SR/S Premium | 17in cast | 120/70 R17 front, 180/55 R17 rear | 58 | W | SL | none | see plate |
Your own placard is the authority. You will find it on the the specifications section of the owner's manual. Where it disagrees with this page, it wins. Match or exceed the size, load index, speed rating and construction class it gives, and use its pressure figure rather than anything printed on the tire.
What changes on this machine
The faired SR/S uses the SR/F's wheels and sizes exactly, but Zero's 2025 manual lists it at 235kg against the SR/F's 227kg and gives it the lower carrying capacity of the two, 219kg.
Pirelli also makes the factory Diablo Rosso III as a 120/70 R17 58H. That is not one Zero lists: every alternative in the manual is a ZR tire rated 58W at the front and 73W at the rear.
No tires listed against this fitment yet. Product specifications are published from each manufacturer's own data and that work is not finished for 120/70 R17. Match or exceed every figure in the table above and you cannot go far wrong.
Where these figures come from
- Zero Motorcycles 2025 FST Street owner's manual, Zero SR/S (Europe and Rest of the World) specifications: factory Pirelli Diablo Rosso III 120/70-17 and 180/55-17; listed alternatives 120/70 ZR17 M/C (58W) TL and 180/55 ZR17 M/C (73W) TL: https://zeromotorcycles.learnupon.com/r/yeso10k89oa54uqysn1hr1tzi1s3xzr (linked from https://www.zeromotorcycles.com/owners)
- Zero Motorcycles 2020 SR/S owner's manual (OM-SRS-MY20), Specifications: same factory sizes and the same listed (58W) and (73W) alternatives: https://zeromotorcycles.learnupon.com/r/9nsvq4rxlwhy5c05ck9hrot5ies50mk (linked from https://www.zeromotorcycles.com/owners)
- Pirelli Diablo Rosso III catalogue page, 120/70 ZR 17 M/C (58W) TL and 180/55 ZR 17 M/C (73W) TL, plus a separate 120/70 R 17 M/C 58H TL: https://www.pirelli.com/tyres/en-ww/motorcycle/catalogue/product/diablo-rosso-iii
Including the manufacturer's own published figure. Neither source is standing next to your vehicle, which is why the placard still wins.
Other machines on the same size
Common questions
- What size tires does the Zero SR/S take?
- It runs 120/70 R17. The exact fitment for your machine is on The specifications section of the owner's manual.
- Can I fit a cheaper tire to a Zero SR/S?
- Only at 120/70 R17 58W or better. That is the figure to hold: a tire below the load index, the speed rating or the construction class is not a cheaper one, it is the wrong one.