2015 Ermini Seiottosei Bolt Pattern & Tire Size
The 2015 Ermini Seiottosei OEM tire size, bolt pattern, and wheel specifications are listed below. All data is based on industry-standard OEM reference specifications.
The 2015 Ermini Seiottosei has a 4x108 bolt pattern, an OEM tire size of 215/45R17, and a 63.4mm center bore.
Other years of the Ermini Seiottosei
2015 Ermini Seiottosei Engine & Trim Levels
Detailed tire and wheel breakdown for the 2015 Ermini Seiottosei
Tire geometry — 215/45R17
The 215/45R17 fitted to the 2015 Ermini Seiottosei has a section width of 215mm and an aspect ratio of 45%, mounted on a 17-inch rim. That gives a sidewall height of 96.8mm (3.81") and an overall outside diameter of 625.3mm (24.62"). At highway speed this tire completes roughly 509 revolutions per kilometre, which is what your speedometer and odometer are calibrated against.
Plus-sizing window
If you want to upsize wheels on the 2015 Ermini Seiottosei while keeping the speedometer accurate, target a 225/37R18 (plus-one). For a softer ride or winter setup, a 205/53R16 (minus-one) keeps the overall diameter within ±3% of stock, which is the industry tolerance for ABS and stability control to stay calibrated.
Wheel fitment specs
The 2015 Ermini Seiottosei uses a 4x108 bolt pattern with a 63.4mm hub bore. Safe rim width range for the OEM tire is 7.0J – 8.0J, and offsets in the ET30 – ET40 window will clear suspension and fender without rubbing on most setups.
Staggered setup notes
The 2015 Ermini Seiottosei ships staggered: 215/45R17 up front and 245/40R17 on the rear. That is a 245mm vs 215mm width difference — do not rotate front-to-rear, and replace tires in axle pairs to keep ABS and traction control balanced.
Tire pressure guidance
Manufacturer-recommended cold tire pressure for the 2015 Ermini Seiottosei is printed on the driver-side door jamb sticker — always defer to that value, not to the maximum pressure printed on the tire sidewall. Check pressure monthly and before long trips; under-inflation by 20% can reduce tread life by 25%.
OEM Wheel & Tire Specs
Frequently Asked Questions
What tire size does the 2015 Ermini Seiottosei Roadster use?
The 2015 Ermini Seiottosei Roadster uses 215/45R17 tires as standard equipment.
What is the bolt pattern of the 2015 Ermini Seiottosei?
The 2015 Ermini Seiottosei has a 4x108 bolt pattern with a center bore of 63.4mm.
What is the wheel offset of the 2015 Ermini Seiottosei?
The 2015 Ermini Seiottosei has a wheel offset of ET35.
Other Vehicles with 4x108 Bolt Pattern
The following vehicles share the same 4x108 bolt pattern as the 2015 Ermini Seiottosei, making wheel interchangeability possible (verify offset and center bore before swapping).