Dedicated Subsystem WorkbenchPlatform Gen: 2018–2026

2021 Ducati Panigale V4 / V4 S / V4 R / V4 SP 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 2021 Ducati Panigale V4 / V4 S / V4 R / V4 SP.

Technical PassportOEM VERIFIED

Engine

1103cc

Cooling

Liquid-Cooled

Final Drive

525 (520 on V4 R / SP) Chain

Engine Oil

3.80 L (4.02 US qt)

Spark Plug

NGK RMAR9A-10

Front Tire

120/70 ZR17 (Pirelli Diablo Supercorsa SP V3 / V4)

Gen 2018–2026

Factory Platform Compatibility: All workshop fluid capacities, maintenance milestones, torque specifications, and consumables on this specification sheet are factory-identical across model years 2018 through 2026.

Select Model Year:(Active: 2021)
9 Production Years (2018–2026)

2018 2019 2020 2021 2022 2023 2024 2025 2026

Tire Engineering & Multi-Scenario Pressure Matrix

ETRTO Validated

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

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Multi-Scenario Inflation Pressures

Solo Street / CommutingCold Baseline

Front: 33 PSI

Rear: 30 PSI

Two-Up Passenger & LuggageMax Load

Front: 35 PSI

Rear: 42 PSI

Trackday / Closed CourseTrack Calibrated

Front: 32 Cold / 34 Hot

Rear: 28 Cold / 30 Hot

Rim Geometry & ETRTO Envelopes

Front Wheel

OEM Rim Width:3.50"

Permissible Envelope:3.50" - 3.75"

Rear Wheel

OEM Rim Width:5.50"

Permissible Envelope:5.50" - 6.00"

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 Supercorsa SP V3 / V4)

Rear:200/60 ZR17 (Pirelli Diablo Supercorsa SP V3 / V4)

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Verified Alternate Fitments

Factory Standard

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 (520 on V4 R / SP) Pitch

OEM Sprockets

16T Front / 41T Rear

Factory Final Ratio

2.560 : 1

Factory Link Count

110 Links

Tensile Rating

Not Available

Quick Gearing Presets

Front Countershaft SprocketStock: 16T

16 Teeth

Factory teeth count

Rear Driven SprocketStock: 41T

41 Teeth

Factory teeth count

Drive Ratio & Torque Impact

Calculated Final RatioStock: 2.560

2.563 : 1+0.10%

Drivetrain Torque Delta

+0.1% Rear Wheel Torque Increase

Quicker throttle roll-on response and aggressive low-to-mid range launch. Reduces top speed in each gear proportionally.

Countershaft Speedo Variance:-0.1%

At 70.0 mph indicated speed, true vehicle ground speed is 69.9 mph. Speedo calibrator module recommended.

Cruising Engine RPM in 6th Gear

60 MPH

Stock: 3,029 RPM

3,032 RPM

+3 RPM

70 MPH

Stock: 3,534 RPM

3,537 RPM

+3 RPM

80 MPH

Stock: 4,038 RPM

4,042 RPM

+4 RPM

Calculated using factory 6th gear ratio (0.923), primary reduction (1.681), and 200/60 ZR17 (Pirelli Diablo Supercorsa SP V3 / V4) 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 2021 Ducati Panigale V4 / V4 S / V4 R / V4 SP.

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

8 Active Campaigns

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

Verify VIN on NHTSA.gov

The U.S. National Highway Traffic Safety Administration reports 8 safety recall campaigns associated with this platform. Independent repair shops and riders should confirm that authorized dealership warranty remedies have been applied.

NHTSA #26V050000STRUCTURE / POWERTRAIN

Received: 01/01/2021▼

NHTSA #25V570000POWER TRAIN:AXLE ASSEMBLY:AXLE SHAFT

Received: 01/01/2021▼

NHTSA #19V382000FUEL SYSTEM, GASOLINE:STORAGE:TANK ASSEMBLY:FILLER PIPE AND CAP

Received: 01/01/2021▼

NHTSA #18V854000ENGINE AND ENGINE COOLING:ENGINE

Received: 01/01/2021▼

NHTSA #18V834000ENGINE AND ENGINE COOLING:ENGINE

Received: 01/01/2021▼

NHTSA #18V480000SERVICE BRAKES, HYDRAULIC:FOUNDATION COMPONENTS:DISC:PADS

Received: 01/01/2021▼

NHTSA #18V239000FUEL SYSTEM, GASOLINE:STORAGE:TANK ASSEMBLY

Received: 01/01/2021▼

NHTSA #18V238000FUEL SYSTEM, GASOLINE:STORAGE:TANK ASSEMBLY:FILLER PIPE AND CAP

Received: 01/01/2021▼

OEM Workshop Archives

Official Factory Service Bulletins & Field Updates

5 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

NHTSA Safety Campaign 25V-570 / Ducati SRV-RCL-25-002Desmosedici Stradale / Single-Sided Swingarm Platform

Bulletin #SRV-RCL-18-006Safety Recall 18V-834 / CR167: Panigale V4 Oil Cooler Output Port Welded Reinforcement & Hose Fittings

Source: RCRIT-18V834-1259.pdf

Mandated Torques:Oil Cooler Delivery & Return Hose Nuts: 15 N·m ± 10% (24mm open crowfoot socket adapter)Oil Cooler Radiator Duct Stud Nuts (2x M6): 5 N·m ± 10%Lower Half-Fairing Screws (M5x14): 4 N·m ± 10%

Consumable Specs:Shell Advance 4T Ultra 15W-50 (0.42 L top-up quantity)Klüberplus S 06/100 rubber vibration isolator assembly lubricantClean engine oil for Viton O-rings

Genuine Part Numbers:54811364A (Countermeasure Oil Cooler with Welded Gusset Plates)88641321A (Viton Fluoroelastomer O-Ring Seals, 4x)71314901A (Vibration Damper Spacers with Collar, 2x)

NHTSA Recall 18V-834Ducati Campaign SRV-RCL-18-006 / CR167

Ducati Panigale V4 Oil Cooler Output Port Reinforcement & Hose Fittings

Countermeasure cooler (54811364A) with dual welded port reinforcement plates, 24mm union nuts 15 N·m, duct mounts 5 N·m & 0.42L top-up.

Thermal Reliability UpdateHose Unions 15 N·m / Mounts 5 N·m

Recall Countermeasure Kit:54811364A88641321A71314901A

NHTSA Safety Campaign 18V-834 / Ducati SRV-RCL-18-006 / CR167Panigale V4 / V4 S / V4 Speciale (2018–2019)

Bulletin #SRV-RCL-18-008Safety Recall 18V-854 / CR169: Desmosedici Stradale Hydraulic Timing Chain Tensioner Torque Revision

Source: RCRIT-18V854-6810.pdf

Mandated Torques:Front Bank Hydraulic Chain Tensioner: 50 N·m ± 5% (27mm 12-point box socket, revised from 30 Nm)Rear Bank Hydraulic Chain Tensioner: 50 N·m ± 5% (27mm 12-point box socket, revised from 30 Nm)Left Fairing Puller Screws (M5x12): 5 N·m ± 10%

Consumable Specs:None (dry threads; interference crush washer A seated on tensioner body)

Genuine Part Numbers:42610491A (Hydraulic Chain Tensioner Assembly with Washer A)Washer A (Interference-fit seal ring; replace complete tensioner if missing)

NHTSA Recall 18V-854Ducati Campaign SRV-RCL-18-008 / CR169

Ducati Desmosedici Stradale Hydraulic Timing Chain Tensioner Sealing

Front and rear bank hydraulic chain tensioner torque revision: 50 N·m (increased from 30 N·m), 27mm 12-point socket & washer inspection.

Torque Revision Campaign50 N·m (27mm Box Socket)

NHTSA Safety Campaign 18V-854 / Ducati SRV-RCL-18-008 / CR169Desmosedici Stradale V4 1103cc / 998cc Platform

Bulletin #SRV-RCL-19-001Safety Recall 19V-382 & 18V-238 / CR177: Panigale V4 Fuel Tank Filler Cap Venting System & Check Ball Deletion

Source: RCSB-19V382-9239.pdf

Mandated Torques:Valve Block Fastening Screws (2x Torx T10): 0.9 N·mFiller Plug Outer Ring Screws (4x M5x16): 4 N·m ± 10%Fuel Tank Front Pivot Screw (M6x20): 10 N·m ± 10%

Consumable Specs:None

Genuine Part Numbers:43314761A (Fuel Tank Warning Decal: Fuel spray may cause injury, Open slowly)43314751A (Owner's Manual Rider Handbook Addendum Page)Check Ball 7 (Permanently extracted and deleted from valve chamber)

NHTSA Recall 19V-382 & 18V-238Ducati Campaign SRV-RCL-19-001 / CR177

Ducati Panigale V4 Fuel Tank Filler Cap Venting & Pressure Relief System

Fuel pressurization countermeasure: Valve block check ball removal, Torx T10 0.9 N·m, M5 ring screws 4 N·m & decal 43314761A.

Fuel Safety RecallCap Screws 4 N·m / Valve 0.9 N·m

Campaign Components:43314761A43314751ACheck Ball RemovalDDS 2.0 Global Scan

NHTSA Safety Campaign 19V-382 / 18V-238 / Ducati SRV-RCL-19-001Panigale V4 (all variants 2018–2019)

Bulletin #SRV-RCL-26-001Safety Recall 26V-050: Panigale V4 & Streetfighter V4 Rear Brake Line Heat Shield Protection

Source: RCLRPT-26V050.pdf

Mandated Torques:Rear Brake Line Banjo Screws: 25 N·m ± 5%Heat Shield Retaining Bracket Screws: 5 N·m ± 10%

Consumable Specs:DOT 4 Brake FluidThermal Shield Reflective Sleeve

Genuine Part Numbers:High-temperature thermal reflective sleeve assemblyCopper crush sealing washers

Explore Other Subsystems for this 2021 Ducati Panigale V4 / V4 S / V4 R / V4 SP

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Subsystem Guide/torques

Fastener Torques

Engine drain plug, axle spindles, caliper mounts, triple clamp pinch bolts & thread lubrication derating guide.

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Subsystem Guide/fluids

Fluids & Capacities

Oil: 3.80 L (4.02 US qt) • Coolant: 2.60 L (2.75 US qt) • Brake: DOT 4 (Brembo HTC 64T / Motul RBF 660 for track)

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Subsystem Guide/fuses-relays

Fuses & Relays

Main: N/A • Location: N/A

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Subsystem Guide/compression

Compression & Leakdown

Ratio: 14.0:1 • Std: 185-235 PSI • Limit: 160 PSI

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Subsystem Guide/valves

Valve Clearances

Intake: N/A mm • Exhaust: N/A mm

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Subsystem Guide/fuel-delivery

Fuel Delivery & TB Sync

Idle: N/A • Rail Pressure: N/A • Vacuum: N/A

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Subsystem Guide/electrical

Charging & Battery

Battery: YT12B-BS (12V 10Ah) / Lithium-Ion (12V 4Ah, OEM 66920031A on V4 S / SP / R)

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Subsystem Guide/suspension

Suspension & Sag

Front Travel: 120 mm • Rear Travel: 130 mm

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Subsystem Guide/maintenance

Maintenance Schedule

Oil: Every 7,500 miles (12,000 km) mi • Valves: N/A • Plugs: Every 15,000 miles (24,000 km) mi

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