# Technical Regulations

See below for technical regulations for the latest series. Previous regulations [are available on the forum](https://rush.sr/resources/regulations-for-rush-sr-spec-series.18/).

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## What Changed for 2026

### Brake System

* **Section 7.1:** Brake pads changed from open (any brand/compound, Lotus Elise fitment) to RAW OEM only. All brake components including pads, rotors, and calipers must be as originally manufactured and purchased from RAW.
* **Section 7.3 (NEW):** Brake fluid is open spec but must meet minimum DOT 4.

### Minimum Weight

* **Section 3.2.1:** SR minimum weight increased from 1,325 lbs to 1,350 lbs (dry tires).
* **Section 3.2.1:** SR wet tire minimum increased from 1,305 lbs to 1,325 lbs.

### Setup Restrictions (NEW)

* **Section 3.5.1:** Maximum camber limit added: −3.0° front and rear. No camber limit existed in 2025.
* **Section 3.5.1:** Minimum ride height added: 17.25 inches measured from ground to top of front chassis bar at tag location. No ride height rule existed in 2025.

### Fuel

* **Section 13.1:** 2026 allows only 91–94 octane pump gas. Sunoco 94 and Sunoco 95 Optima are no longer named options.
* **Section 13.4 (NEW):** Cooling of fuel is prohibited in any form.
* **Section 13.5 (NEW):** Fuel must be used exactly as supplied — no additives or modifications.

### Gear Ratios

* **Section 11.4.1:** Front sprocket options reduced from 14/15/16 tooth to 14/15 tooth only. The 16-tooth option is eliminated.

### Springs

* **Section 6.4.1:** Only springs supplied by RAW are permitted. Specific color/rate designations from 2025 (700 lb Red, 800 lb Blue) no longer apply.

### Data, Electrical & Sensors

* **Section 16.2:** Sensor additions restricted to data sensor packs sold by RAW Aftersales only. 2025 allowed adding specific individual sensors (steering angle, fuel pressure, coolant pressure, oil temp).
* **Section 10.2:** No unauthorized device may be connected to any electronic control system (CANBus).
* **Section 10.3.2:** Permitted to hardwire clocks, USB chargers, cameras, SmartyCams, GoPros, Garmin Catalyst, rear-view cameras, and Garmin Zumo R1 Radar System.
* **Section 16.6:** Resetting the data acquisition system after official sessions is not permitted.

### Tires

* **Section 12.4.2:** All drivers must use the same tire type (slick or rain) in all races and qualifying sessions.
* **Section 12.5.1:** Tire warmers and any means of artificially varying tire temperature are prohibited.
* **Section 12.5.3–12.5.4:** Cleaning tires after sessions is permitted; chemical or thermal treatment beyond normal cleaning is prohibited.

### Safety Equipment

* **Section 15.1:** Arm restraints now mandatory (were optional in 2025).
* **Section 15.1:** Camber plate upgrade now mandatory (was optional in 2025).
* **Section 15.1:** Case saver now mandatory (was optional in 2025).
* **Section 15.1:** Clutch switch (or equivalent per 10.3.1) now mandatory (was optional in 2025).
* **Section 15.5.1–15.5.2:** FHR and helmet requirements clarified with specific standards.
* **2027 mandates announced:** Trident rollbar, behind-seat fuel tank, and FIA 8860/8059 ABP helmet.

### New Procedural Requirements

* **Section 2.1.1:** Annual technical inspection required before competition each calendar year.
* **Section 2.2.3:** Top 5 finishers must drive directly to Parc Fermé after qualifying and races.
* **Section 12.3.3:** Formal Tire Replacement Request form required for damaged tire replacement.
* **Section 22.2:** Formal Vehicle Replacement Request form required for spare (X) car usage.
* **Section 1.6:** Non-RAW parts must be reported to technical inspectors before competition via a Tech Variance Form.
* **Section 25.4:** Protest fee of $250 added for technical and administrative protests.

### Video & Communications

* **Section 17.0.2:** Livestreaming without telemetry is now explicitly permitted.
* **Section 17.0.4:** Video cameras mounted outside the vehicle are prohibited unless authorized by RAW.
* **Section 19.2:** Wind deflector source opened from RAW-manufactured only (2025) to OEM or aftermarket.

### Permitted Modifications Now Requiring Declaration

* See sections 19.3–19.5 for specific information.


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