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Traxxas TRX-4 Machined Overdrive Ring & Pinion Gear (12/33T)

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Traxxas TRX-4 Machined Overdrive Ring & Pinion Gear (12/33T)
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The Traxxas TRX-4 Machined Overdrive Ring & Pinion Gear is a heavy duty gear upgrade for your TRX-4 build. This ring and pinion gear set is overdriven compared to the stock gear ratio, meaning it will provide increased wheelspeed. This gear is more durable than the stock parts and is better suited to high power ESC/Motor systems. Package includes one 33T ring gear and one 12T pinion gear.

A popular tuning option is to overdrive the front axle, and underdrive the rear axle. This can be achieved using a variety of gear combinations. You can run standard in the front, and underdrive in the rear, overdrive in the front and standard in the rear - or for the most dramatic impact, run overdrive in the front and underdrive in the rear. See option list below.

Gear Options:

  • Underdrive: TRA8288
  • Standard: TRA8279R
  • Overdrive: TRA8287 

This product was added to our catalog on February 19, 2018

Zachary James
Verified Owner
Wednesday, Dec 8 2021 (about 2 years ago)
Traxxas TRX-4 Machined Overdrive Ring & Pinion Gear (12/33T)
Easy installation, as for performance, I noticed a bigger boost with the overdrive than the underdrive when tested separately. I have both in a Trx4 Sport and do serious rock crawling. If you have extra cash to spend buy both overdrive and underdrive, buy honestly you could just get by fine with the overdrive.
Louis Milinazzo
Verified Owner
Thursday, Aug 27 2020 (about 4 years ago)
Traxxas TRX-4 Machined Overdrive Ring & Pinion Gear (12/33T)
I installed this on the front axle of my trx4 sport. Climbing seems a bit better with no downside. Side Hilling is still very good and is fine on the trail. My Sport is geared down so I'm not going very fast like a TRX4 with a 2 speed trans. I'm adding the rear underdrive gear to gain further advantage on the rocks.
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