Parts/Drivetrain/Spur gears/Team Associated RC10B74 Center Differential Spur Gear Set (72T & 78T)
Team Associated RC10B74 Center Differential Spur Gear Set (72T & 78T)
Team Associated

Team Associated RC10B74 Center Differential Spur Gear Set (72T & 78T)

Part # ASC921494.0(3)
Where to buy
$10.99
AMain Hobbies
Seen Oct 12, 2026
$10.99Buy
Prices are as last seen at the store; stock is not tracked.

About this part

This is a replacement Team Associated RC10B74 Center Differential Spur Gear Set, including one 72 Tooth and one 78 Tooth Spur Gear. 
CA Residents Prop 65 Warning WARNING: This product can expose you to chemicals including Di(2-ethylhexyl)phthalate (DEHP), which is known to the State of California to cause cancer and birth defects or other reproductive harm. For more information go to www.P65Warnings.ca.gov Details...

Reviews4.0 · 3 reviews

BMTVerified owneron Team Associated RC10B74 Center Differential Spur Gear Set (72T & 78T)

These work well at a fair price but I'm running mod and I only need the 78t, but they have them in this pack where you are forced to buy both the 72t and the 78t which I don't need since the 72t is for stock motor racing. If they sold them seperate like they normally with their spurs for other cars I would only have to spend $6 for the 78t.

1 found this helpful
Charlie ArmesVerified owneron Team Associated RC10B74 Center Differential Spur Gear Set (72T & 78T)

I am writing this review having not actually used the 78t yet, ( I am currently running 13.5T Boost class with a 72t spur / 23t pinion). I was pleasantly surprised at the quality of the spur. I am assuming these are molded which can sometimes yield an oblong gear. But these seem to be perfectly round. I quadruple checked while setting the mesh. I was going to buy some of the Revolution designs machined spurs, but as long as these are perfectly round and wear okay, I'm going to just stick with the Associated.

Rrr8Verified ownerMay 30, 2021on Team Associated RC10B74 Center Differential Spur Gear Set (72T & 78T)

Fits well and works well as long as you don’t get any dirt, sand or tiny rock in a tooth. The spur gear is the only thing that I’ve had to replace on the b74.1d after 8 months of use. Strong little buggy

What reviewers say

Reviewers describe the gear set as fitting well and performing reliably at a fair price. One owner reports about eight months of use before replacing the spur, and notes that grit or small rocks lodged in a tooth cause problems. Another reviewer praises the gears as perfectly round and well-finished, though they had not yet run the 78T. A separate complaint is that the set bundles the 72T and 78T together, forcing buyers who run modified motors to pay for a 72T they do not need, since Associated sells spurs individually for other cars. Reviews are few and cover different use cases.

  • + Fits well
  • + Fair price
  • + Gears appear perfectly round
  • + Durable for about eight months of use
  • − Teeth vulnerable to dirt, sand or small rocks
  • − Bundled 72T and 78T forces unwanted purchase
  • − Spur needed replacement after eight months
Summary generated from the reviews above.

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