# Dave's a genius

**URL:** <https://community.electricforum.com/t/daves-a-genius/6448>\
**Category:** GEM Forum\
**Created:** [October 30, 2016, 6:54am UTC](https://community.electricforum.com/t/daves-a-genius/6448 "2016-10-30T06:54:15Z")\
**Posts on this page:** 3\
**Page:** 1

<div class="post-metadata">

**Author:** ![LithiumGods](https://yyz2.discourse-cdn.com/flex030/user_avatar/community.electricforum.com/lithiumgods/32/672_2.png) [@LithiumGods](https://community.electricforum.com/u/LithiumGods)\
**Post date:** [October 30, 2016, 6:54am UTC](https://community.electricforum.com/t/daves-a-genius/6448/1 "2016-10-30T06:54:15Z")

</div>

well we all know that already . 😃

but anyway after modifying my gem for higher top speed the one thing I didn’t like was having to run the speedo at half speed to let the car go over 25mph . it wasn’t a big deal I just always wished I could get it to show actual speed . ride 4 fun well send your controller out to be reflashed so it well show actual speed over 25mph but I didn’t think it was worth $300 .

Well Dave mentioned using kmh . made me start thinking about trying the kmh setting and see if it could work . well it did . At 36mph it shows 39kmh so I need to adjust rolling radius a little to compensate . but now I get to see real speed numbers and I didn’t have to spend $300.

thanks again Dave.

---

<div class="post-metadata">

**Author:** ![Inwo](https://yyz2.discourse-cdn.com/flex030/user_avatar/community.electricforum.com/inwo/32/1067_2.png) [@Inwo](https://community.electricforum.com/u/Inwo)\
**Post date:** [October 30, 2016, 8:01am UTC](https://community.electricforum.com/t/daves-a-genius/6448/2 "2016-10-30T08:01:26Z")

</div>

Thank you for the kind words.:o

And now for a plug. Grant reports that the adjustable MMs can be set to read correct mph in the kph setting.

Another customer used a MM to correct speedometer after a gear change.

---

<div class="post-metadata">

**Author:** ![grantwest](https://yyz2.discourse-cdn.com/flex030/user_avatar/community.electricforum.com/grantwest/32/15_2.png) [@grantwest](https://community.electricforum.com/u/grantwest)\
**Post date:** [October 30, 2016, 8:47am UTC](https://community.electricforum.com/t/daves-a-genius/6448/3 "2016-10-30T08:47:46Z")

</div>

[http://www.electricforum.com/cars/gem-nevs-forum/10636-magic-magnet-km-p-version.html](http://www.electricforum.com/cars/gem-nevs-forum/10636-magic-magnet-km-p-version.html)