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O.S. Engine O.S. ENGINE 1/8 R2103 On-Road 21 Class Engine OSMG2020

USD 309.90 USD 400.90 (Save 22.7%)

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Tags: O.S. Engine Engine

O.S. ENGINE 1/8 R2103 On-Road 21 Class Engine OSMG2020 #OS1AY00


The next generation of on-road performance has arrived with the Speed R2103 from O.S.! Capable of a wider range of torque than the R2102, the Speed R2103 dominates even on high-grip surfaces. Superior fuel consumption ensures you get the most mileage from every fill-up. Factory-applied two-color graphics add signature style to this sleek-looking power plant.


  • For: 1/8 On-Road
  • Material: Metal / Plastic
  • Color: Black
  • Compatible with 16% nitro fuel, which complies with EFRA regulations.
  • Crankshaft with Diamond-Like Coating (DLC) and an embedded tungsten weight.
  • Outer head with factory-applied two-color graphics.
  • Inner button head allows for finer tuning to meet track conditions.
  • Steel rear ball bearing.
  • Slide valve carburetor.
  • 8.5 mm reducer installed in the carburetor venturi to reduce the amount of airflow for greater torque.
  • Turbo RP7 glow plug.
  • Includes exhaust seal ring, tapered collet and three carb dust seal caps.
  • Also available with the T-2080SC Pipe Set, constructed of polished aluminum and tuned for competition.


  • Displacement: 0.213 cu in (3.49 cc)
  • Bore: 0.633 in (16.08 mm)
  • Stroke: 0.677 in (17.2 mm)
  • RPM Range: 4,000-45,000
  • Output: 2.76 hp @ 33,000 rpm
  • Weight: 11.99 oz (340 g)


  • O.S. ENGINE 1/8 R2103 On-Road 21 Class Engine OSMG2020 (1 set)

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