JConcepts 48P Associated "Silent Speed" Machined Spur Gear (69T)

Read Reviews
3 (2)
Write a Review
With your purchase, receive at no cost:
BSG Kicker Button

This is an optional JConcepts 48 Pitch, 69 Tooth "Silent Speed" Machined Spur Gear, and is intended for use with the Associated RC10 B4, T4, B44 and SC10 vehicles. By popular demand, JConcepts has expanded the Silent Speed line with this 69 tooth gear, developed specifically for stock class racing to provide more gear ratio options. The heart of any R/C vehicle is its transmission, and at the top of the transmission lies the spur gear; an integral part of racing performance. Spur gears or straight-cut gears are one of the simplest forms of gear; however they directly influence the ratio, speed and sound of R/C vehicles and are an extremely important tuning option. These gears when meshed together correctly, provide the transfer of power from the motor to the transmission and are one of the key elements in the versatility and sound of a vehicle.

Silent Speed spur gears are precision machined making them uniquely concentric over standard or molded gears giving the user a consistent gear mesh allowing a more precise adjustment and more “silence” on the race track. The detailed machining provides a pattern vented area and secured slipper pad on both sides giving more consistent slipper performance. The gears are marked for size in 2 different ways so they are identifiable either assembled within a slipper assembly or as a stand-alone part. Silent Speed spur gears are also branded with the small JC logo for brand identification and authenticity.

Machined, recessed dots on the outer edge indicate size while assembled within the slipper assembly for easy identification:

  • 1 dot = 69 tooth
  • 2 dot = 72 tooth
  • 3 dot = 75 tooth
  • 4 dot = 78 tooth
  • 5 dot = 81 tooth
  • 6 dot = 84 tooth
  • 7 dot = 87 tooth


  • JConcepts simple design and function
  • Precision machined for durable and concentric design
  • Machined to indicate size while assembled or stand-alone
  • Fits Associated B4.1, T4.1, B44.1 and SC10 vehicles
  • JConcepts - World Proven Innovation and Design

This product was added to our catalog on October 12, 2012.

Monday, Dec 30 2013 (about a year ago)
JConcepts 48P Associated "Silent Speed" Machined Spur Gear (69T)
These spur gears are great. As opposed to "just molded"(and out of round usually) gears these are concentric and easier to find proper mesh. They do not have pronounced high and low points of gear mesh providing best wear caracteristics. These cost more because of the extra cnc work; as each is machined seperately, but well worth it. Dont forget to keep them covered to prevent debris from ruining the investment. I personally like a wide(thicker than the spur), hardened aluminum pinion also.
Ryan Hodges
Verified Owner
Monday, Jul 22 2013 (about a year ago)
JConcepts 48P Associated "Silent Speed" Machined Spur Gear (69T)
Don't waste your money on this. There is no difference in sound vs. the AE one. Save the extra $4-$5 and buy something to eat instead.

$1.99 Flat Rate Shipping!

Low Price: $8.39
In Stock!
Limited Quantities Available.
This item is eligible for $1.99 flat rate shipping Learn More
This item earns up to 8 VIP Reward Points Learn More

Manufacturer Info

Browse other products from JConcepts