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Description
ARRMA Kraton Outcast 8S 20T Mod1 Safe-D8 Pinion Gear 311040The ARRMA Safe D8 20T Mod1 Pinion Gear ARA311040 is a steel drivetrain gear designed for compatible ARRMA Kraton and Outcast 8S vehicles requiring reliable power transfer and secure motor shaft engagement. The Safe D8 design provides a strong connection for high power RC applications using compatible 8mm motor shafts. Features Steel Construction: Durable material designed for demanding large scale RC drivetrain use 20 Tooth Mod1 Gear: Provides the
The ARRMA Safe-D8 20T Mod1 Pinion Gear ARA311040 is a steel drivetrain gear designed for compatible ARRMA Kraton and Outcast 8S vehicles requiring reliable power transfer and secure motor shaft engagement. The Safe-D8 design provides a strong connection for high-power RC applications using compatible 8mm motor shafts.
Features
- Steel Construction: Durable material designed for demanding large scale RC drivetrain use
- 20 Tooth Mod1 Gear: Provides the correct gearing option for compatible ARRMA 8S power systems
- Safe-D8 Shaft Design: D-shaped bore matches compatible motor shaft profiles for secure engagement
- Precision Manufactured Teeth: Supports smooth and consistent drivetrain operation
- Replacement And Tuning Part: Suitable for drivetrain maintenance or gearing adjustments
Specifications
- Brand: ARRMA
- Part Number: ARA311040
- Product Type: Pinion gear
- Tooth Count: 20T
- Pitch: Mod1
- Shaft Fitment: Safe-D8 8mm motor shaft
- Material: Steel
- Compatibility: ARRMA Kraton 8S and Outcast 8S vehicles
Includes
- 1 x ARRMA 20T Mod1 Safe-D8 pinion gear
FAQ
Does the ARRMA ARA311040 pinion gear fit the Kraton 8S? Yes. The ARRMA ARA311040 20T Mod1 Safe-D8 pinion gear is compatible with supported ARRMA Kraton 8S vehicles.
What motor shaft size does this pinion suit? The ARRMA ARA311040 Safe-D8 pinion gear is designed for compatible 8mm motor shafts.
Important Notes
- Check your vehicle and motor specifications to confirm ARA311040 compatibility before installation
- Ensure correct gear mesh adjustment after fitting to reduce drivetrain wear
Shipping Notes
- Free Standard Shipping on $100+ Orders to the USA.
- Except Preorder products are shipped in 48 hours.
- Delivery to the USA:
- Standard Shipping : 3-10 business days
- If time is of the essence, please consider selecting expedited delivery for faster service.
Exchange/Return Notes
- We offer a 30-day return/exchange service after receiving.
- Final sale items are not eligible for returns or exchanges.
- To process your return/exchange, please contact us at [email protected]
- Please click here for more details>>> Return & Exchange Policy
4.1 ★★★★★
Based on 7 reviews
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Product Reviews
★★★★★ 5
Excellent down alternative insert
Size: Full/Queen, Style: All-Season
I purchased this down alternative for my Airbnb because we can easily wash it. I love that it is fluffy and warm and easy to put into the duvet. Price was great as well!!
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Reviewed in the United States on April 19, 2026
★★★★★ 5
Feels luxury, I approve
Size: King, Style: Warm
I have purchased high end comforters/duvet inserts and this one is somehow my favorite. It's so thick and fluffy.
I was going to do the double duvet insert method to create an extra lush bed situation, but honestly it's not needed at all with this comforter! It poofs up wonderfully inside my duvet cover (king duvet, king insert) and it's like heaven. It's very cozy yet airy, and it moves well during the night and does not fee too heavy despite its weight.
This thing is definitely on the warm end and probably won't be suitable for Florida summers, but depending on how you set the AC at night it could be fine!
The comforter is weighty, it feels like quality, and has a soft fabric. I wouldn't use it without a duvet cover, that's more of an aesthetic choice but I like keeping it clean. The white is very white.
Honestly, I will be getting another one simply because I'm so impressed. Definitely no need to drop $300+ dollars elsewhere.
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Reviewed in the United States on October 25, 2025
★★★★★ 4
ALL SEASON IS TOO WARM!
Size: King, Style: All-Season
I got the King, All Season, to squeeze into a Queen duvet for extra floof and it's sooo cozy. Highly recommend.
I redacted 1 star though because although it says All Season, the amount of down in here feels like it's for winter. The first night I used it I woke up dripping in sweat. It's currently March, I live in Los Angeles area, hitting about 75° weather outside rn, but I sleep with AC full blast at night (usually hit about 64 when I wake up). I can't sleep with it, I'll need to buy the "cool" one, and hope that isn't tooo thin.
Don't get me wrong, it's a great insert, but holy hell, it's too heckin' warm. I saw someone else mention it and wish I had honed in on their comment. I don't wanna return it as it was used, so I'm stuck with it now.
*UPDATE*
I am back because I also bought the "Cool" blanket as well after experiencing the heat of the all season and it too is also too hot for me. I've had a duvet before but I guess not filled to the capacity of these blankets. If you're a hot sleeper maybe look elsewhere?
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Reviewed in the United States on March 12, 2026
★★★★★ 5
Buy this instead of the ‘brand name’ one
Size: Twin, Style: Warm
Tl:DR:
Buy it, it’s super cheap, better than the one I paid 2x the price for and soft as it can get, and it really is a ‘Winter comforter’.
This review is going to sound like I got paid off for it but I actually didn’t. I bought another comforter prior to this one, paid close to double of this one and that the ‘on sale’ price, and it is trash compared to this Amazon basics one. Both claim to be thick warm comforters but I can literally stack two of the other brand and maybe they’d be almost as thick as the Amazon one. I only bought this one because the other ‘winter’ one I bought was so thin and flimsy I figured adding another ‘cheapie’ one might make me not freeze to death. As soon as I arrived I noticed that this Amazon one was WAY thicker, nicer looking, softer and warmer than the old one. Just to try it out I stacked both of them together to see if I wouldn't freeze to death like I was doing with the old ‘expensive’ one: five minutes in and I was sweating. That’s all it took, I immediately removed the duvet cover from the old one, switched it to the Amazon one and threw the old one somewhere where I couldn’t see the money I had wasted, and yes the Amazon was warmer and softer even WITHOUT the duvet cover. I’m probably going to get the light version for when fall hits and I don’t quite need the heavy one yet. Buy it you won’t regret it and hey it’s Amazon brand so if you don’t like it they’ll take care of you, but I HIGHLY doubt you won’t love this thing.
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Reviewed in the United States on April 14, 2026
★★★★★ 5
Great duvet insert
Size: King, Style: Light
Perfect duvet insert. I got a pretty expensive duvet to cover this and they worked great together. The fit was perfect and I didn’t feel like the duvet was smaller than its cover. This was a cheap option that keep us warm while not being too think. This product is also breathable and recommend if you live in a place that transitions from hot to cold often.
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Reviewed in the United States on April 6, 2026