Speed R2102 Competition .21 On-Road Engine by O.S.

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The O.S. Speed R2102 Competition .21 On-Road Engine was developed with a goal of dominating the world championships. O.S. went back to the drawing board to give the Speed R2101 a facelift, resulting in the Speed R2102. Virtually everything about the R2102 has been tweaked, in an effort to deliver the world class performance 1/8 scale on-road racers demand. But, the key features that have made Speed engines popular among enthusiasts are still here, including the DLC coated and tungsten weighted crank and a ceramic rear bearing.

  • Center of gravity is 3mm lower, for better handling
  • A second inner button head allows for finer tuning to meet track conditions
  • Ceramic rear bearing reduces friction loss
  • Sharp laser etched graphics
  • Compatible with 16% nitro fuel, which complies with EFRA regulations
  • Retains Speed innovations such as DLC coating and tungsten weighted crank

Displacement: .213 cu in (3.49 cc)
Bore: 0.633 in (16.08 mm)
Stroke: 0.677 in (17.2 mm)
Practical RPM: 4,000-45,000
Power Output: 2.8 ps/2.76 hp @ 33,000 rpm
Weight: 11.99 oz (340 g)

  • R2102 inner head
  • T-RP7 plug
  • Exhaust seal ring
  • Tapered collet

This product was added to our catalog on April 19, 2016.