Rivian Dead Pedal Extension

🎁  Get $100(s) in Rivian Rewards points and 3 months free RAN charging by using my referral code TODD11893313 when 🛒 ordering a Rivian.

UPDATES

2025-06-02

• Added a split version of the insert so that all pieces can be printed on an A1 mini with 180mm x 180mm print bed.  The longest piece is now 170mm long.

2025-05-13

• I've updated the main models with new versions that support the OEM all-weather mats.

• ARGH!  If you downloaded the -all-weather STL models, you probably got bad models.  The locations on the base for the clips were not correct!  They shifted without me noticing.  The clips should be exactly between the second and third insets on the bottom.  They might work in other locations, but no guarantees.  Apologies.

Dead Pedal Extension

This is a dead pedal extension for a Rivian R1S or R1T.  It raises the dead pedal by about 1.25" (31mm) so your feet rest more evenly. This isn’t a factor of the driver’s height so much (I’m 6’2”) but rather the fact that the middle of the seat is positioned more in front of the accelerator.  Therefore, you have to reach further to the dead pedal.

I've designed this to closely mimic the OEM pedal look on my Adventure trim.  For those without the silver accents, you can just omit the insert and it looks pretty good … or do whatever you like, it's your vehicle.

Installation

It should be noted that my Rivian has a pretty decent gap (~½") on the left of the dead pedal to the side panel, but a friend's Rivian has pretty much no gap.  I'm pretty sure I'm the outlier and there isn't supposed to be a gap.  So, when you install the extension, you'll need to push against the side panel a bit to get the clips to slide between the side panel and the left edge of the dead pedal.  Once those drop down, you should be able to slide the extension forward/back until the cutouts on the bottom drop over nubs and it will sit flat.  The left clips should be fully attached at this point and feel solid and not want to come out.  Finally, hold the extension tight against the floor so it's nice and flat and then push the end of the long clip down and in so the end snaps under the plastic next to the carpet.

To remove, you'll likely need a tool of some sort (something plastic, like a trim removal tool) and just pull on the bottom end of the long clip near the carpet.  Once that end is unhooked, you can then push the extension left, against the side panel and wiggle it enough to release the small clips and the extension should be able to be lifted out.

Compatibility

As far as I know, Rivian uses the same dead pedal on all R1 models. They do differ by looks between trims, though, so it’s possible the clips don’t fit correctly on trims other than Adventure (I have a Gen1 R1S).

Please let me know if you have trouble with the clips not fitting properly. It’s possible we need different clips for different trims.

The extension is possibly NOT compatible with after-market all-weather mats, as those tend to cover part or all of the dead pedal.  This DOES work with the Rivian All-Weather mats.

R2 - I've test driven an R2 and the stock dead pedal feels like it's in a good location.  I don't think it needs an extension!

Printing

The following settings are included in the PrusaSlicer .3mf and what I used to print the model you see in the photos:

• Use PETG or ASA (or similar) to better withstand the heat of a car.  This is most important for the hooks!

• No supports, but there is some bridging.

• I used Black PETG-CF and Grey PETG in the photos.

• 0.4mm nozzle at 0.20mm layer height

• Base(s)

  • 8% gyroid infill

  • Hilbert Curve top infill pattern💡

  • 2 perimeters

  • Single perimeter on top surfaces

• Insert

  • 15% gyroid infill

  • Hilbert Curve top infill pattern💡

  • 2 perimeters

  • Single perimeter on top surfaces

• Hooks

  • Print these on their side for proper strength.

  • Print 2x left hooks (small ones)

  • Print 1x right hook (long one)

  • 4 perimeters (mostly solid)

💡Note: I use Hilbert Curve top infill pattern so that over time you don't see scratches.  It hides that kind of thing pretty well.  Up to you, though!

Support

If you like my models and want to make my day, you can buy me a ☕!