Pedal Hysteresis: What It Means for Brake Feel

What hysteresis means for a pedal

Hysteresis is the lag that appears when a system responds to an input in a way that depends on the direction of that input. In a pedal set, hysteresis means the brake reading at one pedal position is not the same when you press the pedal as when you release it. The gap between the two readings is hysteresis.

Every pedal has some hysteresis. The mechanical parts, springs, pivots and rubber blocks, and the sensor that reads the pedal both contribute to it. Hysteresis is not the same as a dead zone. A dead zone is a range without response. Hysteresis is a difference based on direction.

The direct consequence is that your foot has to make a small correction every time you change direction on the pedal. That makes small brake adjustments less direct, and it matters most when you are releasing the brake gradually. You can compare racing wheel and pedal sets to see which sets state their sensor type.

Understanding hysteresis before you buy is a step toward choosing a pedal set that matches your expectations. The guides on this site compare stated details, so the sensor words a listing publishes become the most useful signal you have. When a listing says Hall effect or load cell, you know the principle behind the reading, even though the hysteresis figure is absent.

Mechanical hysteresis in the pedal mechanism

The pedal mechanism is a set of moving parts. When you press, the spring compresses and the pivot turns. When you release, the same parts travel back along a slightly different path because of friction in the bushings and the memory of the rubber.

That return path is the mechanical part of hysteresis. A listing rarely describes it. Words such as spring, rubber, pivot and linkage tell you that mechanical parts exist, but a stated figure for mechanical hysteresis does not appear in a catalogue.

The way the parts are put together affects how much the pedal sags or sticks. A worn bushing or a misaligned pivot can add to the lag, but the listing will not show that. You can only compare what the maker publishes, and that means you read the sensor type and the pedal count first.

• Springs return the pedal along a different path than the press
• Bushings around the pivot add friction that changes with direction
• Rubber blocks or stoppers affect how the pedal ends its travel

Sensor hysteresis in pedal readings

The sensor turns pedal position into a signal. Magnetic sensors like Hall effect sensors respond to a magnet moving past them. Load cell sensors measure the force applied to a bar or disc. Both have an internal lag of their own, which is separate from the mechanism.

A listing may name the sensor technology. Thrustmaster describes its T-LCM pedals as a multiplatform magnetic pedal set that features a brake pedal incorporating a load cell. Logitech describes its RS Pedals as Hall effect brake and gas pedals. Fanatec presents sim racing hardware and does not publish a hysteresis figure for its pedals.

Sensor words tell you the principle, not the amount of lag. Hall effect and load cell are both common, and a catalogue does not state which produces less hysteresis. The maker's support pages and manual are the place to look if the maker publishes a detail beyond the listing. Start with the pedal sensor types guide for the meaning of each word.

When you see a sensor word, you know the technology behind the reading. That is still a useful piece of information because it lets you compare two listings that use different words. The best approach is to read the maker's manual for any additional technical notes that go beyond the catalogue description.

How hysteresis affects brake modulation

Modulation is the ability to change brake pressure in small steps. Trail braking, releasing the brake as you turn into a corner, is the most common situation where modulation matters. Hysteresis makes those small steps less predictable because the reading for a given foot position changes with the direction of your foot.

You cannot remove hysteresis by reading a listing. What you can do is compare the stated details that relate to it: the sensor technology, the mechanical parts, and the number of pedals. A pedal set with a stated load cell rating, such as the 165.3 lbs (75 kg) figure Logitech states for the RS Pedals, tells you the force the sensor is built around, not the hysteresis.

The practical approach is to choose a pedal set that states its sensor type and then read the maker's support pages before deciding. This site compares stated details, so no article here claims a measured feel for any pedal. The load cell brake benefits guide explains what a load cell rating means.

Modulation is also about how your foot learns the pedal. If hysteresis is larger, your foot has to adapt. Knowing that hysteresis exists helps you understand why the first few sessions with a new pedal set feel different from what you expected.

What a listing can and cannot tell you

A listing can tell you the sensor technology, the number of pedals, and the mechanism words. It can state a load cell rating when the maker publishes one. It cannot state the amount of hysteresis, because hysteresis is not a listed specification.

When you read a listing, focus on the details that are there. The sensor type and the pedal count are stated. The material and the connector type are stated. Hysteresis is not stated, so you move on to the next signal.

Pedal technology words to read

Load cell is a force sensor that deforms under pressure. Hall effect is a magnetic position sensor that reacts to a magnet. A magnetic pedal set is a set that uses magnetic sensing. Spring and rubber describe the return mechanism.

These are all useful stated details because they let you compare different pedal sets on the same words. None of them is a hysteresis rating. The compare in the buying guides is based on the stated details the maker publishes, so the best racing wheel guide is the place to start when you want a set that states its sensor type.

The pedal sensor types guide goes into each word in more detail. The load cell brake benefits guide explains what the load cell number means. Both guides stay within what a listing states and what the source pages say.

What to pick for your situation

Questions

Is hysteresis a number in any racing wheel listing?

No. Makers state sensor type, pedal count and sometimes a load cell rating, but hysteresis is not a listed specification. The maker's manual or support pages may describe the mechanism further.

Does a load cell pedal have less hysteresis than a Hall effect pedal?

This site cannot say. The guides compare stated details, and hysteresis is not stated. Read the maker's support pages and manual for anything beyond the listed details.

What words in a listing relate to hysteresis?

Sensor words such as load cell, Hall effect and magnetic, and mechanism words such as spring, rubber and pivot. They describe the parts that contribute to hysteresis, not the amount.

Can I reduce pedal hysteresis?

This article does not advise on adjustments or modifications. Read the maker's manual and support pages for anything beyond the listed details.

Should a listing with no sensor word be avoided?

A missing sensor word is one of the missing details a buyer can note. The compatibility list and the rest of the listing tell you more about the set before you decide.

Is hysteresis the same as pedal dead zone?

No. A dead zone is a range of pedal travel where the reading does not change regardless of position. Hysteresis is a different reading depending on whether you are pressing or releasing at the same physical position.

Where can I find the maker's manual for a pedal set?

The manual is on the maker's support pages, not in the listing. Logitech and Thrustmaster publish manuals for each product on their official sites.