# 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/). {% file src="" %} {% file src="" %} ## 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.