# Variable ratio trans **URL:** \ **Category:** EV Small Talk\ **Created:** [July 28, 2008, 7:41pm UTC](https://community.electricforum.com/t/variable-ratio-trans/859 "2008-07-28T19:41:15Z")\ **Posts on this page:** 5\ **Page:** 1
**Author:** ![MikesTrikes](https://avatars.discourse-cdn.com/v4/letter/m/74df32/32.png) [@MikesTrikes](https://community.electricforum.com/u/MikesTrikes)\ **Post date:** [July 28, 2008, 7:41pm UTC](https://community.electricforum.com/t/variable-ratio-trans/859/1 "2008-07-28T19:41:15Z")
[B]The kind used on go-carts and some ATVs and I guess some cars. Other than the go-cart models who makes some thats suitable for say a 6.7" DC motor in a 1300 pound EV ?[/B] ---
**Author:** ![MikesTrikes](https://avatars.discourse-cdn.com/v4/letter/m/74df32/32.png) [@MikesTrikes](https://community.electricforum.com/u/MikesTrikes)\ **Post date:** [July 29, 2008, 1:17pm UTC](https://community.electricforum.com/t/variable-ratio-trans/859/2 "2008-07-29T13:17:57Z")
[B]Would an EV benefit from this ? As speed builds and the power it takes to keep you going drops the gear ratio will go higher and the motor will spin even less and in turn help extend the range and top speed ?[/B] ---
**Author:** ![enganear](https://avatars.discourse-cdn.com/v4/letter/e/ed655f/32.png) [@enganear](https://community.electricforum.com/u/enganear)\ **Post date:** [August 3, 2008, 5:40am UTC](https://community.electricforum.com/t/variable-ratio-trans/859/3 "2008-08-03T05:40:53Z")
A CVT tuned or actively controlled to keep the motor near its max efficiency point would of course be beneficial. This is just a stepless gearbox. There are not many in production capable of moving a full sized EV and the ones there are are usually computer controlled. There is a Ford crossover (now discontinued) and the small Mercedes hatchback that I have driven with this type transmission and I really liked it. Foot the the floor would bring the engine to its hp peak and hold it there while the speedometer climbed. -enganear ---
**Author:** ![MikesTrikes](https://avatars.discourse-cdn.com/v4/letter/m/74df32/32.png) [@MikesTrikes](https://community.electricforum.com/u/MikesTrikes)\ **Post date:** [August 3, 2008, 8:29am UTC](https://community.electricforum.com/t/variable-ratio-trans/859/4 "2008-08-03T08:29:01Z")
Well I contacted[B] COMET[/B] and they have some that would be good for light EVs like the Trike I want to build 1000-1300 pounds. Most are for High HP Snowmobiles… something to look into. ---
**Author:** ![ipodfansmail](https://avatars.discourse-cdn.com/v4/letter/i/48db29/32.png) [@ipodfansmail](https://community.electricforum.com/u/ipodfansmail)\ **Post date:** [August 7, 2008, 8:23pm UTC](https://community.electricforum.com/t/variable-ratio-trans/859/5 "2008-08-07T20:23:47Z")
I can’t agree with you more.