How the cars communities compare
A few giants dominate — r/cars, r/IdiotsInCars and r/whatcarshouldIbuy together account for 85% of the combined membership. Size and activity don't line up perfectly: r/cars has the most members, but r/whatcarshouldIbuy gets the most new posts (about 111 a day, against 24 in r/cars). Per member, the liveliest is r/ArAutos: 20 posts a day from 38K members — a smaller crowd, but an engaged one. Among the communities we track weekly, r/cars grew fastest recently (+0.01%, +943 members since Oct 26). The oldest is r/cars, founded in 2008, and every community here is more than five years old — this is a long-established corner of Reddit.
The 14 biggest cars subreddits
r/cars 7,442,417 members · ~24 posts/day · +943 since Oct 26 · since 2008r/Cars is the largest automotive enthusiast community on the Internet. We're Reddit's central hub for vehicle-related discussion, industry news, reviews, projects, DIY guides, advice, stories, and more.
r/IdiotsInCars 4,065,802 members · ~16 posts/day · +412 since Oct 26 · since 2015When idiots get behind the wheel of a vehicle, shit gets funny.
- Wr/whatcarshouldIbuy ↗ 508,168 members · ~111 posts/day · since 2013
Car model advice and general buying discussion.
- Fr/fuckcars ↗ 465,724 members · ~22 posts/day · since 2016
Discussion about the harmful effects of car dominance on communities, environment, safety, and public health. Aspiration towards more sustainable and effective alternatives like mass transit and improved pedestrian and cycling in…
- Cr/CarsIndia ↗ 458,391 members · since 2012
Cars India - Discuss cars and other automobiles here. (CarInd 🚗-🇮🇳) Auto enthusiasts discuss carIndia scene, sedans, SUVs, hatchbacks, motor racing, safety etc here on reddit. Any automobile that moves on four wheels can be disc…
- Cr/classiccars ↗ 366,142 members · since 2011
A place to discuss and/or post pictures of classic cars, trucks, or bikes; including hot rods, car shows and auto museums. Note - this is not for classifieds. Posts selling vehicles or vehicle parts will be removed.
- Cr/CarsAustralia ↗ 237,022 members · since 2013
A subreddit for discussing cars in Australia.
- Rr/rccars ↗ 129,143 members · ~41 posts/day · since 2011
Subreddit devoted to RC Cars, Buggies, Truggies, Short Course Trucks, and everything in-between!
- Sr/SelfDrivingCars ↗ 91,886 members · ~3.4 posts/day · since 2012
News and discussion about Autonomous Vehicles and Advanced Driving Assistance Systems (ADAS).
- Ar/AndroidAuto ↗ 85,735 members · ~7.9 posts/day · since 2014
PLEASE READ SUB RULES ESPECIALLY ON USER FLAIR REQUIREMENT AND THE FAQS BEFORE POSTING A community for Android Auto users, including those on OEM and aftermarket head units and all phones accommodating the Android Auto app. Share…
- Vr/vintagejapaneseautos ↗ 80,357 members · since 2014
A place to share images, videos, and discussions of classic (25+ years old) Japanese cars, trucks, and motorcycles.
- Mr/ModelCars ↗ 46,889 members · ~14 posts/day · since 2011
This subreddit is the home of model cars, trucks and bikes. Feel free to share photos of your completed models, works in progress, tips and techniques.
- Ur/UsedCars ↗ 44,646 members · since 2008
UsedCars: Everything with Buying & Selling Used Cars.
- Ar/ArAutos ↗ 38,031 members · ~20 posts/day · since 2015
Hogar de los fierreros de Argentina
Choosing where to post
If you have a question, start in r/whatcarshouldIbuy: it is set up for exactly that, and with about 111 new posts a day there are plenty of people around to answer. Competition for attention differs a lot: r/cars has 7.4M members but only about 24 new posts a day — roughly one new post for every 314K members — while r/whatcarshouldIbuy gets about 111 a day, one for every 4.6K. A strong, well-made post therefore has more room to be seen in r/cars; r/whatcarshouldIbuy is better when you want quick replies. There are regional communities too — r/CarsIndia and r/CarsAustralia — which are the better choice for local prices, shops, events or rules.
A simple rule of thumb: ask questions in the specialised communities and share your best finds in the big ones, where they can reach the most people. Always read the rules in the sidebar first — each community is run by its own volunteer moderators. Our guide to searching Reddit explains how to dig through any of these communities, and the subreddit info tool gives you the stats of one we don't list.
Frequently asked questions
Which cars subreddit has the most members?
r/cars is the largest, with 7,442,417 members, followed by r/IdiotsInCars (4.1M) and r/whatcarshouldIbuy (508.2K).
Where are the most new cars posts?
By new posts per day, r/whatcarshouldIbuy leads with about 111, ahead of r/rccars (41). Counts are averages over the last seven days.
Which cars subreddit is best for questions?
r/whatcarshouldIbuy is the one built around questions and advice, with about 111 new posts a day. Check its rules and search it first — common questions have usually been answered.
How many cars communities are on this list?
We list 14 active, safe-for-work cars communities with at least 25,000 members each, 14.1M members in total (people can be in several). Reddit has many smaller ones too; our guide on searching Reddit shows how to find them.
What is the oldest cars subreddit?
r/cars, created on Mar 20, 2008.
Are these cars subreddits safe for work?
Yes. Every community on this page is public and not marked 18+ by Reddit, and we filter out communities whose name or description points to adult content.
Data: Reddit's public subreddit search and the Arctic Shift archive (Nov 6, 2026), growth from SubMouse's weekly snapshots. Member counts of communities outside our Top 1000 come from the archive and can lag a little. Not affiliated with Reddit.