Saturday, April 13, 2024

ProTek Announces New CR21 3-port .21 Off-Road Engine

ProTek announces new CR21 3-port .21 off-road engine that features the same DNA as the successful ProTek Samurai line, but the suggested MSRP is under $300.

ProTek RC Announces New CR21 3-port .21 Off-Road Engine

The CR21 features a newly designed crankshaft to improve engine response and a lightweight piston that further assists with a crisp engine response on throttle input. The combustion chamber design optimizes low to medium RPM ranges, perfect for newer racers, while still offering high performance output at high speeds for more experienced drivers. And it is easy to tune and stabilize with a 2-needle carburetor with 6mm and 7mm inserts available.

ProTek RC Announces New CR21 3-port .21 Off-Road Engine

An “EBIS” version of the ProTek RC CR21 is also available at amainhobbies.com, featuring the engine break-in services of RC racing and industry legend Adam Drake.


  • Displacement: 3.49cc
  • Bore: 16.27mm
  • Stroke: 16.8mm
  • Practical RPM: 4,000-40,000
  • Maximum Output: 2.45ps/33,000 RPM
  • Weight: 381g
  • Included Standard Equipment: T-P3 glow plug, orange 6mm venturi, yellow 7mm venturi, exhaust seal

The budget-friendly ProTek CR21 is now available at AMainHobbies.com or through your local track store or hobby shop.

For more information on the ProTek RC CR21, click the links below:
ProTek RC CR21: https://www.amainhobbies.com/protek-rc-cr21-3port-.21-offroad-engine-turbo-plug-ptk-2670/p1407302
ProTek RC CR21 ‘Drake-In’ Break In Service provided by Adam Drake: https://www.amainhobbies.com/protek-rc-cr21-drakein-3port-.21-offroad-engine-turbo-plug-ptk-2670-1/p1449079