PRECISION AND POWER SAVINGS

Save Up To 50% Off!

CLEARANCE SALE

Save Big While Supplies Last

PRECISION AND POWER SAVINGS

Save Up To 50% Off!

CLEARANCE SALE

Save Big While Supplies Last

  • Cars & Trucks
  • Motorcycles
  • Aircraft
  • Boats
  • Radios
  • Batteries & Chargers
  • Parts
  • Part Finder
  • Learn & Enjoy
  • Sale
  1. Shop
  2. Cars & Trucks
  3. Parts, Electronics & Accessories
  4. Parts

In Stock

Connecting Rod O.S. Speed R21

OS Engines - OSMG2178

$59.99

RC Club points earned on this item shown at checkout.

Replacement Connecting Rod for the O.S. SPEED R21 engine.

Product Details

In The Box

Connecting Rod1

Replacement Connecting Rod for the O.S. SPEED R21 engine.

Product Details

In The Box

Connecting Rod1

What Our Customers Are Saying

We’re looking for stars!
Let us know what you think

HORIZON HOBBY, WHERE RC MEMORIES LIVE.

Who We Are.

At Horizon Hobby, our personal goal is to inspire dreams and build memories. We take pride in providing the best hobby store experience for our customers, whether that’s online, at RC events, or in the RC community with RC cars, RC planes, RC boats, and so much more.

Our Values.

Our purpose is simple: deliver WOW moments. By pursuing the best experience through our portfolio of RC cars, helicopters, airplanes, boats, and more, we bring the RC community together in every city, town, and country. We are radio control innovators and Driven is our middle name.

Our Promise.

Our promise to our customers is creating one-of-a-kind experiences that keeps you coming back for more. We are more than an online hobby store. Our RC cars and trucks, RC airplanes and helicopters, and other radio control products are with you at home, on the go, and with your friends. We bring the fun.

Same Day ShippingFree Shipping Over $99Expert Product SupportEasy Returns

Shop

  • New Releases
  • Our Brands
  • Spektrum Certified Used
  • Fan Gear
  • E-gift Card
  • Vehicle Finder
  • Shop Local
  • Find a Wishlist
  • Trains

Support

  • Technical Product Support
  • RC Blog
  • Order Status
  • Repairs
  • Product Registration
  • Check E-Gift Card Balance
  • Shipping, Billing & Returns
  • Event Donations
  • Train Support
  • Know Before You Fly
  • Get Help

Company Info

  • Our Story
  • Contact Us
  • Horizon Brands
  • RC Club
  • Horizon Hobby Visa Card
  • RC Events Calendar
  • Careers
  • Purchasing & Dealer Inquiries
  • Hobbies for Good
  • Affiliate Program

Legal

  • Privacy Policy
  • Terms & Conditions
  • Site Map
  • Compliance
  • Patents
  • Product Recalls
  • Trademarks

Sign up & save 10% on your next order!*

Be the first to know about new products, deals, and events.

*Some exclusions may apply. First time subscribers only. Your discount code will be emailed to you. By clicking sign up, you agree that you would like information, tips and offers about our events and products. See our privacy policy here.

Sign up for Horizon Hobby Text Alerts!

Never miss out - text HOBBY to 44721. Learn More

Copyright 2025 © Horizon Hobby, LLC

Our cookies

This site uses cookies to enhance your web site experience. By continuing to browse or use this site, you are agreeing to our use of cookies. See our privacy policy here.

    Sign up & save 10% on your next order!*

    Be the first to know about new products, deals, and events.

    *Some exclusions may apply. First time subscribers only. Your discount code will be emailed to you. By clicking sign up, you agree that you would like information, tips and offers about our events and products. See our privacy policy here.

    Sign up for Horizon Hobby Text Alerts!

    Never miss out - text HOBBY to 44721. Learn More