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6v Capacity @7
5 (Short 21
Strong titanium gear train with hardened steel output gear and 25 tooth spline
Thickness: 1mm
Easily win your rival
OS Speed R2105 .21 Nitro On Road Engine Combo 200mm 6v Capacity @7Overview The O. S. SPEED R21 series won the previous World Championships held in the United States. The "R2105", most of the parts has been newly designed, aiming for consecutive victories at the world championship to be held in Japan this year. To increase torque on high grip track surfaces, a newly designed 9 port sleeve is adopted. O. S. SPEED's traditional DLC coated crankshaft delivers linear power from low to top by changing the counter balance.
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