Street League Spec

Spec Guidelines


1280g AUW


Gemfan 7043

HQ 7x4x3


5s 2200mah

Maximum charge is 4.25 per cell! ~21.25v!


Open Source

With durability to spare!


LEDs Visible

Show off what you've got from all angles!


The longest motor list in spec racing!


Download below

Get Started

Spec Software

We’ve made spec racing easy for pilots and approachable for brands by developing flight control software that automatically equalizes motor performance. Grab the latest build here!

We want to thank Infinitee as well as all the other awesome Betaflight Developers for their hard work on this software. Please consider donating to support their efforts!

Download the spec firmware and get racing!

What's New?

Betaflight Updated

Our Goal is to maintain parity with the main Betaflight project. That means you get the latest features from both Betaflight and Street League! It also means the spec software is more likely to work with the latest and greatest gear. 

Current Betaflight version: 4.4

Boost Mode has been enabled! Find the best spot on the track to activate one of 3 momentary boosts to get an edge on your competitors.

  • 3 individual boosts can be used per battery
  • Each boost lasts for 5 seconds 
  • 1k initial RPM upon activation

Boost Setup

  • In the modes tab, set a range for the beeper mode
    • This will enable the boost during flight
  • Optional: in the OSD tab, enable “Battery Usage (graphical remaining)”
    • This will show boost usage and tanks remaining


Just in case someone needs it thrown at them…

Drone Spec Recommendations

This is not a full list. Refer to the rulebook for specifics.


Open source 7″ frames

  • Practice Rig by Project 399 Link
  • TBS Source One 7″ Link 
  • R4LA Link
  • Open Racer 4 Link 


2200mAh 5S



Throttle limit of 75%

Maximum RPM 26250

  • 1250kv: 100% motor limit
  • 1300kv: 96% motor limit
  • 1350kv: 92% motor limit
  • 1500kv: 83% motor limit

Max stator volume of 4950mm³

  • 2510
  • 2808
  • 2807
  • 3106
  • 2806.5

Weight & Accessories

Minimum weight of 1280 grams

LEDs visible from top and bottom