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Lightweight 10-spline gears feature reduced rotating weight which is ideal for limited power such as crate engines, Constructed from high strength 8620 alloy steel making them suitable for use in high HP cars with bigger tires, REM polished surface reduces friction and extends gear life, Quick change gears have crown shaved profile teeth for maximum contact, NOTE: Some ratios offered at reduced price due to small gear in set not being drilled and/or lightened. See Installation Tips for details Premium Lightweight Quick Change Gear Set #27, 22/34 Teeth Sku # 917950-27 Mfr. Part # 917950-27 Condition New Brand Speedway Motors Sold Set Details
***2021 PRI Featured Product Award Winner***
- Premium Lightweight Quick Change Gears are drilled to reduce rotating weight, to deliver the most power to the ground
- 8620 Alloy Steel stands up to the demands of high horsepower engines and large tires
- REM polished surfaces and Crown Shaved Profile teeth reduce friction, run cooler and longer and deliver maxiumum tooth contact
- Lightweight gears are perfect for limited power such as crate engines to give quicker spin up time and maximum power transfer
- Suitable for 410 Sprint Cars, 360 Sprint Cars, 305 Sprint Cars, Modifieds, Open Late Models and Crate Late Models
- Polished surfaces run quieter, making for an excellent gear option for a street quick change rear end
- Available in a large number of gear ratios to fine tune to the track conditions or your street applications
Find the Competitive Advantage in a Durable, Lightweight Quick Change Gear
With the limits on today’s racing engines, it’s hard to find an advantage under the hood. But you can make the most of that horsepower by reducing weight in the driveline. Competition driveshafts and lightweight ring and pinions can reduce rotating mass, making starts quicker and more of that power making it to the rear wheels. But there’s one more place where you can get an advantage: the rear end quick change gears.
Track Tested 8620 Steel Stands Up to The Competition
High demands are placed on the quick change gears of rear ends but Speedway Motors has found a lightweight answer. Tested in race action for a full season before release, our Premium Lightweight Quick Change Gear Sets are drilled for weight reduction, yet constructed of durable 8620 Alloy steel in a perfect balance of strength and weight. Our lightweight gears are perfect for high-horsepower applications with large tires.
Less Weight and Reduced Friction Surfaces Means More Power to the Ground
Less rotating mass means more power goes to the tires. REM finished polished surfaces and crown shaved profile teeth provide better tooth contact which means reduced friction, longer life and cooler running, which not only makes these perfect for the demands of racing, but also make a great complement to a quick-change street setup - the tooth finish and profile make for a quieter running rear-end.
Our Premium Lightweight Quick Change Gear Sets are available in all common sets for any ratio you need. Suitable for 4.11, 4.12 and 4.86 rear ends. Get the most out of your 410 Sprint Car, 305 Sprint Car, 360 Sprint Car, Modified, Open Late Model or Crate Late Model with our award-winning Premium Lightweight Quick Change Gears.
The smaller gear has been undercut but not drilled on the following sets:
The smaller gear has not been undercut or drilled on the following sets
- 7A
- 13
- 15
- 17A
- 18
- 18A
- 21
- 22
- 23
- 24
- 32
- 37
Specs Tooth Count 22/34 Spline Count 10 Gear Material Steel Ratio 1.545 MFG. Part # 917950-27 Sold in Quantity Set Reviews I would buy this again Rated by E 27 on June 26, 2026
Summary: Wouldn't change a thing works as it should good gears
Yes, I recommend this product.
Yes I will buy it again, great quality. Rated by Mick on June 24, 2026
Summary: They're great gears, have bought many of them.
Yes, I recommend this product.
Excellent Product Rated by Iceman on April 01, 2026
Summary: this was put into my Super late model and works as advertised. will buy again when needed
Yes, I recommend this product.
Nice set of gears! Rated by Sam on March 10, 2026
Summary: Lightweight and REM polished all at a great price compared to similar gears!
Yes, I recommend this product.
Nice gears Rated by Smokinjoe26 on April 30, 2025
Summary: Paid a little more for the light weight but the weight savings was worth it for me.
Yes, I recommend this product.
Related Items / Suggested Parts Speedway Motors Quick Change Gear Service Kit, LW Gears Speedway Storage Case, 5 Qt Drain Pan, Quick Change Gear Kit Tech Support We\'re here to help before and after your purchase. If you have a question or need assistance with one of our products, please contact us through Messaging and a knowledgeable Speedway Motors team member will be happy to help. About Speedway Motors is America’s Oldest Speed Shop® and has been a trusted source for specialty rodding and racing products and friendly expert advice for more than 74 years. Founded in 1952 by “Speedy” Bill Smith – a racer and street rodder himself – Speedway has grown from a one-man operation to become the world’s largest manufacturer, distributor and retailer of street rod and racing products. Our industry-leading fast delivery is the result of same-day shipping from our state-of-the-art, centrally located 500,000 sq. ft. headquarters. Speedway’s size offers customers unmatched product selection and low pricing, while our excellent technical support and customer service have made us a recognized leader in the rodding and racing industries.
