Roll Stabilizers


roll stabilizers
Roll stabilizer in dark blue color


Controls the roll of the car from side to side and helps stabilize the car during cornering.

Weight transfer during the roll (left corner)Weight transfer during the roll (left corner)
Weight transfer during the roll (right corner) Weight transfer during the roll (right corner)

When both wheels are on the same level, the anti-roll bar does not affect the suspension motion. When one wheel is riding on a hump, the anti-roll bar will be twisted and transfer the force to another wheel to push it down, so the car body will remain balanced. The thicker the bar, the more anti-roll ability it has.

Based on the above description, you might be surprised to find out that anti-roll bar can introduce even more roll when the car is subjected to cornering force. Nevertheless, such impression is actually incorrect.

When body roll occurs due to cornering, the outside wheels are compressed, hence the anti-roll bars will push the inside wheels away from the body. Does this action result in even more body roll ? No. Because even without the anti-roll bar, the inside wheels will also keep in contact with the ground (due to weight of the car and the expansion force from springs), thus are pushed far away from the body (don't expect them to hang in the air!). In other words, the anti-roll bar doesn't alter the natural movement of the inside wheels.

Anti roll bar
                                                                                 Typical Anti Roll Bar


On the contrary, the twist torque of the anti-roll bar always tries to fight against the compression in outside suspension. Therefore it also reduces body roll.
The advantage of anti-roll bar is very clear - it suppresses body roll on bump or during cornering, but does not deteriorate ride comfort in straight line.

A stiff stabilizer makes the car respond well to sharp turns. Car feels more stable. Downside to that is if stabilizers are too stiff, it reduces weight transfer to the outside tires, reducing grip during cornering and causes understeer or oversteer. Softer allows the car to lean into the turn giving greater grip. But too soft, causes the car to be unresponsive.
If car understeer too much you need to reduce front stabilizers or likewise increase rear stabilizers. Make the front stabilizer softer than the rear to reduce understeer.

Different kind of antiroll bars and different arrangement
Lower right (rear suspension) and left (front suspension) type of antiroll bars is basicaly the same as                                                                   one on  the upper picture


Forward engined cars exhibit a slightly different response to the above; you want a higher front stabilizer setting than the rear. This will have an affect of reducing body roll of an forward engined car, keeping both tires firmly on the road rather than shifting all the weight to the outside tires and reducing grip.


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Books to read


Some useful links:

- f1technical.net, a great site with a lot of technical information’s and explanations. Site is updated daily with news from F1 word.

 - autosport.com, This site is a legend. A bible for racing lovers. News from all around the word. Unfortunately, to get access to all news, interviews and to open the site completely you should be subscribed to Autosport magazine. Anyway, great read.

James Allen on F1
- JA.F1 site (or blog) ovned by ITV Sport’s lead commentator on Formula 1 James Allen

Joe Saward blog
- joesaward is the Joe Saward official blog about Formula 1 world. Joe is an journalist, who write primarily about politics in and around motorsport, specifically on the FIA Formula 1 World Championship

Vital F1
 - vitalf1.com/ is another great site for Motor Sports fan’s like me. Site is relatively new, but great fun, with great discussion forum, Formula 1 news and forum.

 GP update
- f1.gpupdate.net, Site with fresh news from Formula 1

Planet F1
 - planetf1, another site with many different articles, news and statistics. Biased toward British teams, but anyway good read.

Gurney flap
 - gurneyflap.com, Great history site. You can learn a lot from this site. Pictures, cars and many many more. Great.

4ormula1 is a database of Formula 1 history and statistics of drivers, teams, grand prix, and all results since 1950.

Missed Apex Podcast
Enjoy range of Podcasts and Articles on Motorsport. Every week a Formula one chat on Missed Apex F1 Podcast with F1 journalist Joe Saward and tech Analyst Matthew Somerfield as guests. Also the exciting all electric racing series formula E on eRadio Show and Bike Show Lean Angle Podcast.

Racecar engineering
-Racecar Engineering, an online magazine with a lot to learn from, a lot of technical information’s and explanations

 - fia.com, La Fédération Internationale de l'Automobile, representing the interests of motoring organisations and motor car users. Head organisation and ruler in auto sport.

 - wikipedia.org, I don’t believe that I have to tell you anything about this site. It’s not about Formula 1 technology, but you can learn a lot about that too.

Sutton Images

grandprix photo

 - carbibles.com, a great site for normal car users. Here you can find explanations of almost everything about your car and how it works. Technical reviews and explanations of some in-car gadgets.

Dare To Be Different
- Daretobedifferent.org Susie Wolff and UK governing body of UK motorsport have joined forces to launch Dare To Be Different, a high-profile new initiative which is about increasing female participation, not just on the track but in all aspects of the sport.

Giorgio Piola web site