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GT12 Racing

Old 11-20-2021, 04:13 PM
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change to the spool and it will shorten up the rear so the wheels fit inside of the body.
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Old 11-20-2021, 04:46 PM
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Originally Posted by TonyD.
change to the spool and it will shorten up the rear so the wheels fit inside of the body.
Doing that will also drastically change the handling characteristics.
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Old 11-21-2021, 04:24 AM
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Originally Posted by gwc
Doing that will also drastically change the handling characteristics.
yes it will make it handle better in and out of corners.
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Old 11-21-2021, 05:11 AM
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Originally Posted by TonyD.
yes it will make it handle better in and out of corners.

Wider Track Width: Both front and rear. The wider the car, the less lateral weight transfer and the less traction rolling you will have. In High bite conditions, you want to run wider. An added benefit of the wider rear is that it will put more leverage on the side springs making them act softer.
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Old 11-21-2021, 09:05 PM
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trust me you will get better cornering with a spool.
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Old 11-22-2021, 03:23 AM
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Default Gt12 gears options

Hey guys, Ive been racing gt12 on rubber for awhile. We run 1s,usgt motor,sjt, fixed gearing... anyways were looking at splitting the class by doing a fixed gear class and open gear class and using the fixed gearing more like a sportsman/ newer drivers.. Im looking for a good place to start gearing wise. Thanks
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Old 11-22-2021, 03:51 AM
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Originally Posted by rcracersb
Hey guys, Ive been racing gt12 on rubber for awhile. We run 1s,usgt motor,sjt, fixed gearing... anyways were looking at splitting the class by doing a fixed gear class and open gear class and using the fixed gearing more like a sportsman/ newer drivers.. Im looking for a good place to start gearing wise. Thanks
That depends mostly on the track & motor, we run on a black CRC carpet medium size track 21.5 motor rollout of 82.7 to 86.4
Tire dia. (41) x pinion (45-47) x 3.14 / 70 (spur) = rollout (your performance may vary) 😅
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Old 11-22-2021, 04:37 AM
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Originally Posted by rcracersb
Hey guys, Ive been racing gt12 on rubber for awhile. We run 1s,usgt motor,sjt, fixed gearing... anyways were looking at splitting the class by doing a fixed gear class and open gear class and using the fixed gearing more like a sportsman/ newer drivers.. Im looking for a good place to start gearing wise. Thanks
We use that same USGT spec motor on the rubber tires. This will sound crazy but my current gearing is 63 pinion, 67 spur. The track is 90 x 40.
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Old 11-22-2021, 04:48 AM
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Originally Posted by old_dude
We use that same USGT spec motor on the rubber tires. This will sound crazy but my current gearing is 63 pinion, 67 spur. The track is 90 x 40.
121.0 rollout = mind blown🤯
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Old 11-22-2021, 06:50 AM
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come to the Fla. with open motors, open gears and foam tires. .We'll be glad to help you on the gearing for our outdoor and one indoor (carpet Black)
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Old 11-22-2021, 06:55 AM
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Originally Posted by gwc
That depends mostly on the track & motor, we run on a black CRC carpet medium size track 21.5 motor rollout of 82.7 to 86.4
Tire dia. (41) x pinion (45-47) x 3.14 / 70 (spur) = rollout (your performance may vary) 😅

im in black carpet with usgt motor. Track is like 40x60. One long straight rest is pretty technical but fast
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Old 11-22-2021, 08:23 AM
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Originally Posted by BullFrog
come to the Fla. with open motors, open gears and foam tires. .We'll be glad to help you on the gearing for our outdoor and one indoor (carpet Black)
Lived in FL from 1959 to 1973 it was a great place to grow up back then.
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Old 11-22-2021, 08:38 AM
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Originally Posted by BullFrog
come to the Fla. with open motors, open gears and foam tires. .We'll be glad to help you on the gearing for our outdoor and one indoor (carpet Black)

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Old 11-22-2021, 01:43 PM
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Originally Posted by old_dude
We use that same USGT spec motor on the rubber tires. This will sound crazy but my current gearing is 63 pinion, 67 spur. The track is 90 x 40.
Is that ball diff or spool?
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Old 11-22-2021, 03:03 PM
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Originally Posted by rcracersb
Hey guys, Ive been racing gt12 on rubber for awhile. We run 1s,usgt motor,sjt, fixed gearing... anyways were looking at splitting the class by doing a fixed gear class and open gear class and using the fixed gearing more like a sportsman/ newer drivers.. Im looking for a good place to start gearing wise. Thanks
Hi, what is a fixed gearing class? Does everyone need to run the same tooth pinion & spur?
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