underdrive vs overdrive gears

[Redfox]

I was looking through the Yeti manual for information on the over/underdrive gears. I notice that it says for more speed you would use the underdrive gears. Is this true? I thought the overdrive gears would give a little more speed than the underdrive. Also, which gears are better?

[AWraith build]

Must be a miss print.

[gbean]

Underdrive gears are known to have better mesh.

[Redfox]

I thought it was a little strange that the underdrive gears would give a higher top speed.

[Hfrajuncajun]

I've been running overdrive gears pretty much since the beginning. No problems yet.

[Meatwad]

It's not about the gear ratio, it's about the durability of having a better gear mesh.

[CamaroTom]

I hear people say the underdrive gear set has the better gear mesh, but wouldn't a pinion with more teeth on the ring gear have better mesh like the 36/14 overdrive gears?

[nfcrockett]

This explains the better mesh.

Wheels7 handmade Ultra class car with a DLUX twist

[CamaroTom]

Originally Posted by nfcrockett

This explains the better mesh.

Wheels7 handmade Ultra class car with a DLUX twist

Thanks for the link that explains it. Glad I went with the UD gear set.

[Tommy23490]

I too run the underdrive gears front and rear after stripping the stock kit gears.. No problems since.. Fingers crossed!!!

[Caswell]

If it is anything like 1:1, different ratios have different angles. You also end up with thicker and thinner pinions.

On top of all that, you have more or less torque multiplication.