OS SPEED R21GT On-Road / T2060SC Combo

$665.00 USD
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O.S.

1CC01

$665.00 USD
$665.00 USD
Low stock! Only 1 left

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Product Description

The OS SPEED R21GT is a high-performance nitro engine specifically developed for the 1:8 GT On-Road Touring class and designed with top international events like the IFMAR World Championship in mind. The GT class is known for realistic racing scenarios with powerful, heavy vehicles – and the R21GT was optimized precisely for this.

Compared to its predecessor, the OS SPEED 21XZ-GT, the R21GT offers significantly improved performance across the entire rev range . The crankcase is based on the proven R2101 design , which has already proven itself many times over in classic on-road racing and ensures stability and optimal cooling.

The cylinder and piston feature an IFMAR-compliant port layout with 5 transfer ports and 3 exhaust ports , resulting in very smooth power delivery and high efficiency. The newly developed crankshaft has a DLC coating and precisely tuned counterweights. It is press-fitted and specifically designed for quick maintenance and reliable performance in racing conditions.

Another highlight is the redesigned cooling head , which has been specifically tailored to the thermal requirements of GT touring races and ensures stable temperatures even during long runs.

The newly developed 22E (B) GT carburetor with dual-needle adjustment is used for fuel supply. It impresses with excellent pickup characteristics , particularly important when accelerating out of corners – a key factor in the GT class. The included 7 mm restrictor fully complies with IFMAR regulations .

The engine is supplied as a matched combo set including T2060SC resonance tube , creating a perfectly matched overall package for the ambitious GT racer.

Scope of delivery (Combo)

  • OS SPEED R21GT 1:8 GT On-Road Nitro Engine
  • T2060SC Resonance Tube
  • Carburetor 22E (B) GT
  • Ø7 mm restrictor (IFMAR compliant)

Product features

  • 1:8 GT on-road nitro racing engine
  • Specifically designed for the GT Touring class
  • Increased performance across the entire rev range compared to the 21XZ-GT
  • Proven R2101 crankcase
  • IFMAR-compliant port layout (5-channel transfer ports / 3-channel outlets)
  • DLC-coated crankshaft with counterweights
  • New cooling head for maximum thermal stability
  • 22E (B) GT twin-needle carburetor for excellent pickup
  • Including T2060SC tuned pipe
  • compliant with IFMAR regulations

Technical data

  • Engine displacement: 3.49 cc
  • Bore: 16.08 mm
  • Stroke: 17.20 mm
  • Power output: 2.61 hp at 35,000 rpm
  • Practical speed range: 4,000 – 42,000 rpm
  • Weight: 369 g
  • Engine type: 2-stroke nitro
  • Intended use: 1:8 GT On-Road Racing
OS SPEED R21GT On-Road / T2060SC Combo

$665.00 USD

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