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Let us take some of the stress out of holiday gift buying this season by giving you more time to qualify for price adjustments. Price adjustments on purchases are available 10/8/2022 until 12/25/22. If an item you buy has a price reduction before Christmas, we will credit the difference upon request, so you can shop confidently knowing your price is guaranteed.
All credits will be issued as Loyalty Club Points on your Tower Hobbies account.
While inheriting the smooth feeling and good fuel efficiency of the previous model O.S.SPEED R21GT, which was well received in the European market, the home of GT cars, the power feeling in the medium and low speed ranges has been improved by revising the counterbalance of the crankshaft. In addition, the newly designed inner head improves idling performance, and an inner head O-ring is used to reduce vibration and improve dust resistance. The outer head has been made lighter, and has evolved into the O.S.SPEED R21GT II with attention to the detail. O.S. Engines also has a combo set with TB01 (EFRA2042) tuned silencer and MB01-70 manifold.
The crankshaft uses two tungsten counterweights. We have optimized the mass balance by reviewing the detailed dimensions.
The inner head has been revised. Improved low and medium speed feeling and idling performance. An O-ring is also used to reduce vibration and improve dust resistance.
The weight of the new outer head, compared to previous model has been reduced. Fins of outer head has been machined.
Equipped with 5 scavenging ports and 3 exhaust ports to meet IFMAR regulations.
Equipped with a double-adjust type 22E(B) GT carburetor. The new venturi is 7.0MM(RED) AL2.
COMBOSET comes with TB01 EFRA2042 (T-2060SC) + MB01-70 (M2003SC).
The points displayed will be earned based on your membership level, and the cost value of the product. Be sure you Sign In to your account to see the most accurate points estimate for your purchase.
Points displayed here do not include bonus points for select products. If the product is marked with the Bonus Points Badge below, you will earn the extra bonus points listed in the banner in addition to the calculated points displayed.
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