Dedicated Subsystem WorkbenchPlatform Gen: 2007–2016
2015 Harley Davidson Twin Cam 96 / 103 (Dyna / Softail / Touring) 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 2015 Harley Davidson Twin Cam 96 / 103 (Dyna / Softail / Touring).
Gen 2007–2016
Factory Platform Compatibility: All workshop fluid capacities, maintenance milestones, torque specifications, and consumables on this specification sheet are factory-identical across model years 2007 through 2016.
SPECS-TO-CART BUNDLESFactory Direct-Fit Maintenance Bundles Available
1-Click verified Motul engine oil service kits, race filters, spark plugs, and brake fluid pre-measured for this 2015 Harley Davidson Twin Cam 96 / 103 (Dyna / Softail / Touring).
Select Model Year:(Active: 2015)
10 Production Years (2007–2016)
Suggested Items3 Verified Workshop Consumables Available for this Job
View Suggested Items ↓Tire Engineering & Multi-Scenario Pressure Matrix
ETRTO ValidatedInflation targets calibrated across operating modes, verified rim width ranges, and certified alternate sizes.
Multi-Scenario Inflation Pressures
Solo Street / CommutingCold Baseline
Front: 36 PSI
Rear: 40 PSI
Two-Up Passenger & LuggageMax Load
Front: 38 PSI
Rear: 42 PSI
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:3.50"
Permissible Envelope:3.50" - 3.75"
Rear Wheel
OEM Rim Width:5.00"
Permissible Envelope:5.00" - 5.50"
Operating outside ETRTO envelope width alters crown radius, accelerates shoulder wear, and impacts lean stability.
Factory Dimensions & Verified Alternates
Factory Standard Sizes
Front:130/80B17 (Touring) / 100/90-19 (Dyna) / 130/90B16 (Softail)
Rear:180/65B16 (Touring) / 160/70B17 (Dyna) / 200/55R17 (Fat Boy)
Shop In-Stock Matched 2-Tire Sets→Verified Alternate Fitments
Dunlop American Elite Dual Compound Series
Michelin Commander III Touring / Cruiser
Alternate profiles verified for swingarm, chain guard, and fender clearances.
Final Drive Gearing & Speed/RPM Calculator
Belt DriveFactory reduction ratios, interactive sprocket gearing simulator, 6th gear cruising RPM matrix, and swingarm chain adjustment tolerances.
Drive Architecture
Poly-Chain Carbon Belt
OEM Pulleys
32T Transmission / 68T Wheel
OEM Final Ratio
2.125 : 1
Belt Teeth & Width
140T • 1.00 in (25.4 mm)
Cold Tension Deflection
1/4 - 3/8 in (6.4 - 9.5 mm) deflection with 10 lbs force (on jiffy stand cold)
Quick Gearing Presets
Front Transmission PulleyStock: 32T
32 Teeth
Factory teeth count
Rear Wheel Belt PulleyStock: 68T
68 Teeth
Factory teeth count
Drive Ratio & Torque Impact
Calculated Final RatioStock: 2.125
2.125 : 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: 2,295 RPM
2,295 RPM
70 MPH
Stock: 2,677 RPM
2,677 RPM
80 MPH
Stock: 3,060 RPM
3,060 RPM
Calculated using factory 6th gear ratio (1), primary reduction (1.35), and 180/65B16 (Touring) / 160/70B17 (Dyna) / 200/55R17 (Fat Boy) rolling circumference.
Belt Tension & Deflection Spec
Cold Deflection Tolerance
1/4 - 3/8 in (6.4 - 9.5 mm) deflection with 10 lbs force (on jiffy stand cold)
Check tension using a 10-lb belt tension gauge at the lower belt run midpoint window on the side stand.
Belt Architecture
140T • 1.00 in (25.4 mm)
Features factory automatic primary chain tensioner. Inspect compensator sprocket for fretting and spring pack wear every 20,000 miles.
Recommended Belt: Gates Poly Chain Carbon 1" Rear Drive Belt
Factory Chassis Geometry
Chassis Alignment, Drive Tension & Rear Axle Calibration
Precision workshop alignment tools, dynamic drive tension tolerances, and axle spindle calibration for the 2015 Harley Davidson Twin Cam 96 / 103 (Dyna / Softail / Touring).
Belt Drive Architecture
Secondary Belt Deflection & 10-lb Tension Calibration
FACTORY BELT DEFLECTION SPEC:
1/4 - 3/8 in (6.4 - 9.5 mm) deflection with 10 lbs force (on jiffy stand cold)
Measure cold deflection with a spring-loaded belt tension tool applying exactly 10 lbs (4.5 kg) of upward force at the lower belt run inspection window on jiffy stand.
CARBON BELT TOOTH & FLANGE INSPECTION:
140T • 1.00 in (25.4 mm)
Inspect polyurethane cog teeth for stone gouges or embedded gravel. Verify rear pulley chrome flanges show even belt tracking without edge fraying.
OEM Workshop Archives
2 Documented BulletinsOfficial Factory Service Bulletins & Field Updates
Bulletin #M1524M1524: RECALL 0177 - 2019 - 2021 SPORTSTER - HEADLAMP BULB SHIELD
Source: Harley_M1524_Recall0177.pdfMandated Torques:Torque: 5.8–6 in-lbs (0.66–0.68 N·m) (Bulb Shield Screw)Torque: 35–44 in-lbs (4–5 N·m) (Bracket to Visor Screws)Torque: 10–16 ft-lbs (13.5–21.6 N·m) (Visor Bracket Screws)
Consumable Specs:Loctite 243 Medium Strength Blue Threadlocker (HD Part # 99642-97)
Genuine Part Numbers:68297-05A9150010799642-97
Bulletin #Recall0171Part 573 Safety Recall Report 18V-076: ABS Hydraulic Control Unit Flush & Fluid Replacement
Source: Harley_Recall0171_ABS_4574.pdfMandated Torques:Torque: 17–22 ft-lbs (23.0–30.0 N·m) (ABS Manifold / Caliper Banjo Bolts)Torque: 35–61 in-lbs (4.0–6.9 N·m) (Brake Caliper Bleeder Screws)
Consumable Specs:Harley-Davidson Platinum Label DOT 4 Brake Fluid
Genuine Part Numbers:41731-01
Explore Other Subsystems for this 2015 Harley Davidson Twin Cam 96 / 103 (Dyna / Softail / Touring)
Jump straight into dedicated factory specifications and interactive workshop diagnostic engines.
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 (4.00 US qt) • Coolant: N/A • Brake: DOT 4 Glycol-Based High-Temp (Dry BP ≥ 260°C / Wet BP ≥ 165°C)
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Subsystem Guide/fuses-relays
Fuses & Relays
Main: 50A Maxi-Fuse • Location: N/A
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Subsystem Guide/compression
Compression & Leakdown
Ratio: 9.6:1 • Std: 165-185 PSI • Limit: 140 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: YTX20HL-BS (Dyna/Softail) / YIX30L-BS (Touring) • CCA: 385 • Regulated: 14.2 - 14.8 V DC at 3,000 RPM
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Subsystem Guide/suspension
Suspension & Sag
Front Travel: 117 mm • Rear Travel: 76 mm
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Subsystem Guide/maintenance
Maintenance Schedule
Oil: Every 5,000 mi (8,000 km) mi • Valves: N/A • Plugs: Every 10,000 mi (16,000 km) mi
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