Active Circuit⭐ TDX Host Circuit

Circuit Meteorological Telemetry

Real-time circuit weather station, Doppler radar, and calibrated tire thermal rise modeling.

⭐ Official TDX Circuits (Southeast)Primary Event Venues

🌐 National Circuit Network (60+ Road Courses)

Select any North American road course to load live telemetry, Doppler radar, and tire pressure modeling.

🟢 Green Flag (Dry Track)ELEVATION: 15 FT // GPS: 27.4545° N, 81.3483° W

Sebring International Raceway

📍 Sebring, FL · Clear & Sunny · Surface: Historic Bumpy Concrete & Asphalt

📡 Station Reading

Live Feed

Updating telemetry...

Ambient Air

78°F

Est. Asphalt

~100°F

Humidity / Wind

55% · 6 mph

Density Altitude

1,461 ft

Power Delta

-4.2%

🏎️ Track Thermal Loading Characteristic

Turn 17 (The Sunset Bend) demands total commitment across historic WWII concrete seams. Turn 1 blind apex requires trail-braking past pit exit.

🌧️ Wet Track Driving Line Notice

Exercise smooth inputs; painted curbing and pit exit lines hold standing water when damp.

Live Doppler Radar

🛰️ Live Circuit Doppler Weather Radar

Animated Doppler radar loop centered over Sebring International Raceway. Use the bottom timeline scrubber to monitor approaching storm cells.

📡 RainViewer Live Feed

Tire Science

⚙️ Vehicle Setup & Compound Parameters

Calibrated for high-performance track fleet vehicles: GT3, Corvette, M-Chassis, and Spec Racers.

Tire Compound Category

Examples: Bridgestone RE-71RS, Nankang CR-S, Yokohama A052, Falken RT660, Michelin Cup 2

Chassis Weight Class

Drivetrain Layout

Desired Target Hot Operating Pressure33 PSI Hot

26 PSI (Slicks)33 PSI (Typical 200TW)40 PSI (Street Max)

🏁 Estimated Cold Starting Pressures

+9.3 PSI Thermal Rise

Front Cold Baseline

26 PSI

Targets ~33 PSI Hot

Rear Cold Baseline

26 PSI

Targets ~33 PSI Hot

⚠️ Cold Floor Protection Enforced (26 PSI): Calculated cold pressure fell below safe limits for Midweight (2,800 – 3,500 lbs). Starting lower risks tire carcass rollover, rim pinch flat, or shoulder delamination.

⏱️ The 60-Second Pit-In Rule: Hot tire pressures decay 1–2 PSI within minutes of parking. Check hot pressures immediately after pulling off the track into your paddock space, then bleed excess to keep all 4 corners balanced.

Tread Diagnostics

🌡️ Pyrometer Temperature Diagnosis: Inside — Middle — Outside

Diagnose your tire contact patch using a needle probe pyrometer immediately after completing an HPDE session:

Ideal Track Camber Spread

Inside is 10°F to 15°F warmer than Outside

Indicates optimal negative camber. The full tire contact patch is utilized when the vehicle body rolls through apexes.

Over-Inflated (Tire Crowning)

Middle temp is > 4°F hotter than avg(I, O)

Tire center is bulging and bearing excess weight. Grip feels greasy. Action: Bleed 1.5–2.0 PSI hot.

Under-Inflated (Tire Dishing)

Middle temp is cooler than both Inside and Outside

Tire center is concave; load is concentrated on outer shoulders. Action: Add 1.5–2.0 PSI.

⚖️ Advisory & Educational Notice: Target pressures and thermal compensations generated by this tool are educational guidelines for closed-course track events. Dynamics vary substantially by vehicle curb weight, corner balancing, wheel rim width, suspension alignment (camber/toe), driver aggression, and tire manufacturer specifications. Always consult manufacturer published technical specs.

🏎️ Session 1 Warmup Protocol: Never drop heavy performance vehicles (BMW M, Mustang, Camaro) below 28–29 PSI cold before Session 1. Cold radial carcasses lack pneumatic stiffness before core heat builds; running excessively low cold pressures can cause catastrophic sidewall rollover, rim pinch flat, or shoulder delamination. Stage pressure bleeds over multiple sessions.

🚨 MANDATORY HIGHWAY RE-INFLATION WARNING: Tires bled down for optimal track grip will become dangerously under-inflated once cooled to ambient temperatures in the paddock. Drivers driving home on public highways MUST re-inflate all tires to vehicle door jamb placard specifications using paddock compressed air before departing the speedway. Highway driving on track-bled cold tires risks catastrophic blowout, bead seal separation, and high-speed hydroplaning.

TrackDayXperienceDriveTDX.com

Trackside Meteorological Intelligence

Track Weather & Doppler Radar

Live circuit atmospheric telemetry, Doppler precipitation radar, Density Altitude, and calibrated tire thermal rise modeling for Southeast HPDE circuits.

View Live Telemetry Tire Pressure Advisory

Active Circuit⭐ TDX Host Circuit

Circuit Meteorological Telemetry

Real-time circuit weather station, Doppler radar, and calibrated tire thermal rise modeling.

⭐ Official TDX Circuits (Southeast)Primary Event Venues

🌐 National Circuit Network (60+ Road Courses)

Select any North American road course to load live telemetry, Doppler radar, and tire pressure modeling.

🟢 Green Flag (Dry Track)ELEVATION: 15 FT // GPS: 27.4545° N, 81.3483° W

Sebring International Raceway

📍 Sebring, FL · Clear & Sunny · Surface: Historic Bumpy Concrete & Asphalt

📡 Station Reading

Live Feed

Updating telemetry...

Ambient Air

78°F

Est. Asphalt

~100°F

Humidity / Wind

55% · 6 mph

Density Altitude

1,461 ft

Power Delta

-4.2%

🏎️ Track Thermal Loading Characteristic

Turn 17 (The Sunset Bend) demands total commitment across historic WWII concrete seams. Turn 1 blind apex requires trail-braking past pit exit.

🌧️ Wet Track Driving Line Notice

Exercise smooth inputs; painted curbing and pit exit lines hold standing water when damp.

Live Doppler Radar

🛰️ Live Circuit Doppler Weather Radar

Animated Doppler radar loop centered over Sebring International Raceway. Use the bottom timeline scrubber to monitor approaching storm cells.

📡 RainViewer Live Feed

Tire Science

⚙️ Vehicle Setup & Compound Parameters

Calibrated for high-performance track fleet vehicles: GT3, Corvette, M-Chassis, and Spec Racers.

Tire Compound Category

Examples: Bridgestone RE-71RS, Nankang CR-S, Yokohama A052, Falken RT660, Michelin Cup 2

Chassis Weight Class

Drivetrain Layout

Desired Target Hot Operating Pressure33 PSI Hot

26 PSI (Slicks)33 PSI (Typical 200TW)40 PSI (Street Max)

🏁 Estimated Cold Starting Pressures

+9.3 PSI Thermal Rise

Front Cold Baseline

26 PSI

Targets ~33 PSI Hot

Rear Cold Baseline

26 PSI

Targets ~33 PSI Hot

Tread Diagnostics

🌡️ Pyrometer Temperature Diagnosis: Inside — Middle — Outside

Diagnose your tire contact patch using a needle probe pyrometer immediately after completing an HPDE session:

Ideal Track Camber Spread

Inside is 10°F to 15°F warmer than Outside

Indicates optimal negative camber. The full tire contact patch is utilized when the vehicle body rolls through apexes.

Over-Inflated (Tire Crowning)

Middle temp is > 4°F hotter than avg(I, O)

Tire center is bulging and bearing excess weight. Grip feels greasy. Action: Bleed 1.5–2.0 PSI hot.

Under-Inflated (Tire Dishing)

Middle temp is cooler than both Inside and Outside

Tire center is concave; load is concentrated on outer shoulders. Action: Add 1.5–2.0 PSI.