# Small chassis for XRP, with LiPo batteries

**URL:** <https://xrp.discourse.group/t/small-chassis-for-xrp-with-lipo-batteries/720>\
**Category:** Robot Hardware\
**Created:** [May 5, 2025, 4:56pm UTC](https://xrp.discourse.group/t/small-chassis-for-xrp-with-lipo-batteries/720 "2025-05-05T16:56:19Z")\
**Posts on this page:** 3\
**Page:** 1

<div class="post-metadata">

**Author:** ![shurik179](https://avatars.discourse-cdn.com/v4/letter/s/278dde/32.png) [@shurik179](https://xrp.discourse.group/u/shurik179)\
**Post date:** [May 5, 2025, 4:56pm UTC](https://xrp.discourse.group/t/small-chassis-for-xrp-with-lipo-batteries/720/1 "2025-05-05T16:56:19Z")

</div>

Continuing my project of making a customized XRP robot, here is the modified chassis:

 ![PXL_20250505_140454204](https://canada1.discourse-cdn.com/flex011/uploads/xrp/original/1X/81612ee4feabbb5cc34a46b29da7966895c172e0.jpeg)  
Features:

- Smaller size (15.2cm x16cm, compared to 19x19cm for the original)
- Uses either two 18650 Li-Ion batteries or a 2s LiPo battery pack
- Battery pack is shifted back, putting more weight on the wheels and less weight on the casters
- Same side rails and casters, so existing sensor/servo mounts can be used without modification

The design files and detailed description is here:

> **[Small XRP frame by shurik179 | Download free STL model | Printables.com](https://www.printables.com/model/1286151-small-xrp-frame)**
>
> This is a modified version of a frame for XRP robot; it is smaller and intended to be used with Li-Ion batteries | Download free 3D printable STL models

---

<div class="post-metadata">

**Author:** ![Fgrossman](https://avatars.discourse-cdn.com/v4/letter/f/b77776/32.png) [@Fgrossman](https://xrp.discourse.group/u/Fgrossman)\
**Post date:** [May 5, 2025, 5:57pm UTC](https://xrp.discourse.group/t/small-chassis-for-xrp-with-lipo-batteries/720/2 "2025-05-05T17:57:33Z")

</div>

Fun, how is the traction with those treds?

---

<div class="post-metadata">

**Author:** ![shurik179](https://avatars.discourse-cdn.com/v4/letter/s/278dde/32.png) [@shurik179](https://xrp.discourse.group/u/shurik179)\
**Post date:** [May 5, 2025, 6:12pm UTC](https://xrp.discourse.group/t/small-chassis-for-xrp-with-lipo-batteries/720/3 "2025-05-05T18:12:44Z")

</div>

Traction is quite good, but I din’t run any formal tests. Should do that.