How to choose Rivian R1T and R1S mud flaps
By ReferCharge. Updated 2026-08-17.
Choose by listed vehicle and model-year fitment first, then balance coverage against ground clearance. A longer flap can catch more spray while sitting closer to obstacles.
Fitment and hardware checks
- Confirm the listing names R1T, R1S or both and includes your exact model year.
- Treat Gen 1 as 2022–2024 and Gen 2 as 2025+; do not infer cross-generation fit.
- Check whether the set includes two or four flaps, all hardware and any aero-hole covers it requires.
- Compare the mounting method with the vehicle before removing clips or drilling any panel.
Slim or maximum coverage
LOW PROFILE
Slim splash guards
- Keep more ground clearance and a subtler side profile.
- Cover less area behind the tire than a longer flap.
COVERAGE
Longer mud flaps
- Place more material between tire spray and the body side.
- Need extra attention to curb, snow and trail clearance.
After installation, turn the steering through its range and check for tire contact, rubbing, loose clips and uneven gaps.
Mud-flap options
We do not own a Rivian, so nothing below is a hands-on review. Each pick is checked for fitment against the maker's own listed compatibility, and we say plainly where owners report problems.
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Fitment checked
TWRAPS slim mud flaps, set of four
Set of 4The maker lists a no-drill slim set covering the 2021-2026 Rivian R1T and R1S, with aero hole covers.
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Fitment checked
BestEvMod splash guards for the R1S
R1SThe listing states a four-piece splash guard set for the 2022-2026 Rivian R1S.
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Common questions
Do R1T mud flaps fit an R1S?
Only when the maker lists both vehicles. Some products name the R1T and R1S together, while others are sold for one body style.
Do mud flaps require drilling?
It depends on the product. If a listing states no-drill installation, still inspect the supplied hardware and follow the maker's sequence without forcing factory clips.
Will mud flaps stop every stone chip?
No. They can reduce some tire-thrown spray and debris, but they cannot shield every painted surface or prevent damage from all road conditions.
Should mud-flap hardware be rechecked?
Yes. Follow the maker's maintenance directions and inspect the flaps after installation, winter buildup or rough-road use for looseness and rubbing.