Dedicated Subsystem WorkbenchPlatform Gen: 2020–2026

2025 Ducati Streetfighter V4 / V4 S / SP / SP2 Tire Sizes, Cold Pressures & Gearing Ratios

OEM tire sizes, front cold PSI (), rear cold PSI (), sprocket teeth count, final drive ratio, and chain pitch for 2025 Ducati Streetfighter V4 / V4 S / SP / SP2.

Technical PassportOEM VERIFIED

Engine

1103cc

Cooling

Liquid-Cooled

Final Drive

525 Chain

Engine Oil

3.80 L (4.02 US qt)

Spark Plug

NGK RMAR9A-10

Front Tire

120/70 ZR17 (Pirelli Diablo Rosso Corsa II / IV)

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Gen 2020–2026

Factory Platform Compatibility: All workshop fluid capacities, maintenance milestones, torque specifications, and consumables on this specification sheet are factory-identical across model years 2020 through 2026.

Select Model Year:(Active: 2025)
7 Production Years (2020–2026)

2020 2021 2022 2023 2024 2025 2026

Suggested Items3 Verified Workshop Consumables Available for this Job

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Tire Engineering & Multi-Scenario Pressure Matrix

ETRTO Validated

Inflation targets calibrated across operating modes, verified rim width ranges, and certified alternate sizes.

Shop Direct-Fit Tires

Multi-Scenario Inflation Pressures

Solo Street / CommutingCold Baseline

Front: Not Available

Rear: Not Available

Two-Up Passenger & LuggageMax Load

Front: Not Available

Rear: Not Available

Off-Highway / Terrain Pressure

Maintain OEM cold baseline for street transfers; adjust -2 to -4 PSI for loose terrain.

Rim Geometry & ETRTO Envelopes

Front Wheel

OEM Rim Width:Not Available

Permissible Envelope:Not Available

Rear Wheel

OEM Rim Width:Not Available

Permissible Envelope:Not Available

Operating outside ETRTO envelope width alters crown radius, accelerates shoulder wear, and impacts lean stability.

Factory Dimensions & Verified Alternates

Factory Standard Sizes

Front:120/70 ZR17 (Pirelli Diablo Rosso Corsa II / IV)

Rear:200/60 ZR17 (Pirelli Diablo Rosso Corsa II / IV)

Shop In-Stock Matched 2-Tire Sets→

Verified Alternate Fitments

Factory standard sizing recommended.

Alternate profiles verified for swingarm, chain guard, and fender clearances.

Final Drive Gearing & Speed/RPM Calculator

Chain Drive

Factory reduction ratios, interactive sprocket gearing simulator, 6th gear cruising RPM matrix, and swingarm chain adjustment tolerances.

Launch Full Gearing Simulator Shop Chains & Sprockets

Factory Pitch / Size

525 Pitch

OEM Sprockets

15T Front / 42T Rear

Factory Final Ratio

2.800 : 1

Factory Link Count

110 Links

Tensile Rating

Not Available

Quick Gearing Presets

Front Countershaft SprocketStock: 15T

15 Teeth

Factory teeth count

Rear Driven SprocketStock: 42T

42 Teeth

Factory teeth count

Drive Ratio & Torque Impact

Calculated Final RatioStock: 2.800

2.800 : 1

Drivetrain Torque Delta

OEM Factory Baseline Dynamics

Balanced all-around factory engineering calibrated for EPA emissions and street usability.

Countershaft Speedo Variance:0.0%

Speedometer reads true to factory calibration standards.

Cruising Engine RPM in 6th Gear

60 MPH

Stock: 3,313 RPM

3,313 RPM

70 MPH

Stock: 3,865 RPM

3,865 RPM

80 MPH

Stock: 4,417 RPM

4,417 RPM

Calculated using factory 6th gear ratio (0.923), primary reduction (1.681), and 200/60 ZR17 (Pirelli Diablo Rosso Corsa II / IV) rolling circumference.

Chain Sizing & Swingarm Slack

Recommended Drive Chain Length:110 Links

Fits within factory swingarm axle slot adjustment range. Retain stock 110 links.

Factory Swingarm Slack Tolerance

Measure slack at midpoint between countershaft and rear axle on the bottom strand with the motorcycle on its side stand unladen.

Master Link Requirement:Not Available

Recommended Hardware: •

Shop Chain Breaker & Rivet Tools Find Direct-Fit Gearing Sets

Factory Chassis Geometry

Chassis Alignment, Drive Tension & Rear Axle Calibration

Precision workshop alignment tools, dynamic drive tension tolerances, and axle spindle calibration for the 2025 Ducati Streetfighter V4 / V4 S / SP / SP2.

Factory Swingarm Slack Tolerance

Not Available

Test Condition: Measure midway on lower chain run with bike on side stand (unweighted).

Measured Chain Slack

30 mm

10mm (Too Tight)Factory Window: 25 - 35 mm65mm (Critical Slack)

PASS: IN FACTORY SPEC(30 mm / 1.18 in)

FACTORY TOLERANCE CERTIFIED: Chain tension is in optimal balance. Allows complete swingarm articulation through the entire suspension stroke without countershaft binding or excessive snatch on deceleration.

Precision Alignment

Rear Axle Caliper Alignment

Why mechanics never trust swingarm stamped notches: Factory stamping tolerances can be off by up to 3mm, causing the rear tire to "dog-track" and chew through tire shoulders.

LEFT PIVOT TO AXLE:

215.0 mm

RIGHT PIVOT TO AXLE:

215.0 mm

PERFECT WHEEL ALIGNMENT (PASS)Δ 0.0 mm

Rear axle is square to the swingarm pivot within 0.5mm. Sprocket and chain tracking run in direct true plane.

Wear Limit Diagnostic

21-Pin (20-Pitch) Chain Stretch Test

Pull chain tight and measure distance across 21 consecutive pins with a vernier caliper. Standard new length = 317.5 mm; factory discard limit = 323.0 mm (1.5% stretch).

MEASURED 21-PIN DISTANCE:

317.5 mm

Stretch: +0.0 mm (0.0%)

Remaining Chain Pin/Bushing Life:100% (GOOD)

Three Professional Workshop Alignment Techniques

Method 1 — Swingarm Pivot to Axle Center (The Gold Standard):

Insert a precision rod or vernier caliper measuring from the center dimple of the swingarm pivot bolt to the center dimple of the rear axle on both left and right sides. Both sides must match within 0.5 mm. This mechanically guarantees that the rear axle is perfectly perpendicular to the motorcycle chassis centerline regardless of factory swingarm stamping defects.

Six-Step Workshop Chain Adjustment Protocol

Rear Axle Nut: Not Available - Refer to Factory Workshop ManualAdjuster Locknut: 16 - 22 N·m

1Loosen Axle Spindle Nut

Loosen the rear axle nut 1 to 2 full turns (Not Available - Refer to Factory Workshop Manual). Keep it snug enough so the wheel does not cock sideways freely.

2Back Off Adjuster Locknuts

Back off the jam locknuts on both the left and right adjuster bolts by 2 to 3 turns using a 12mm or 14mm box wrench.

3Turn Adjusters in Small Increments

Turn both adjuster bolts equally. One full 360° turn of an M8 bolt moves the axle by 1.25 mm. Adjust 1/4-turn at a time.

4Kick Tire Firmly Forward

Kick the rear tire firmly toward the front of the motorcycle to ensure the axle blocks are solidly seated against the bolt heads.

5Torque Rear Axle Nut to Spec

Torque the axle spindle nut to exactly Not Available - Refer to Factory Workshop Manual. Always use a calibrated 1/2" torque wrench.

6Crucial Re-Check of Slack

Torquing down the rear axle nut frequently tightens chain slack by 2 to 4 mm! Always re-check slack after full torque is applied.

Official NHTSA Safety Recalls & Technical Bulletins

0 Open Campaigns (Clean)

U.S. Department of Transportation compliance database (Title 49 U.S.C. Chapter 301).

Verify VIN on NHTSA.gov

No Active Federal Safety Recalls Reported

The U.S. DOT National Highway Traffic Safety Administration (NHTSA) records zero open safety recall campaigns for the 2025 Ducati Streetfighter V4 / V4 S / SP / SP2 platform. Always check your individual 17-digit VIN at an authorized dealership or via NHTSA.gov for individual recall completions.

OEM Workshop Archives

Official Factory Service Bulletins & Field Updates

2 Documented Bulletins

Bulletin #SRV-RCL-25-002Safety Recall 25V-570: Panigale V4 & Streetfighter V4 Single-Sided Swingarm Rear Wheel Axle Shaft Replacement

Source: RCLRPT-25V570-3457.pdf

Mandated Torques:Rear Wheel Collar Nut (M48x1.5): 230 N·m ± 5% (55mm 12-point socket, Shell Retinax HD2 grease)Eccentric Hub Pinch Clamp Screws (2x M12): 35 N·m ± 5% (1-2-1 alternating sequence)Rear Sprocket Cush Drive Nuts (6x M10x1.25): 48 N·m ± 5% (Loctite 243)Rear Brake Rotor Screws (4x M8x20): 25 N·m ± 5% (Loctite 270)

Consumable Specs:Shell Retinax HD2 or Gadus high-load axle greaseLoctite 243 medium-strength threadlockerLoctite 270 high-strength threadlocker

Genuine Part Numbers:81920831AA (Recalled Rear Wheel Shaft)81920611A (Recalled Rear Axle Assembly)81920951AA (Countermeasure Rear Wheel Shaft)75010071E (M48x1.5 Wheel Collar Nut)85210571A (Conical Belleville Spring Washer)75990081A (Safety Circlip Hairpin Pin)

NHTSA Recall 25V-570Ducati Campaign SRV-RCL-25-002

Ducati Panigale V4 / Streetfighter V4 Single-Sided Swingarm Rear Wheel Axle Shaft

Structural integrity recall: Replacement of rear wheel shaft (81920831AA / 81920611A), notch effect mitigation, M48 collar nut 230 N·m & eccentric clamp 35 N·m.

Critical Safety CampaignM48 Nut 230 N·m / Eccentric 35 N·m

Genuine Part Numbers:81920831AA81920611A81920951AA75010071E