---

---

---

Page 3 - Investigate your driving & setup


Okay. So far we know

Applying that to GP79

Now the tricky part. We can use from 100% wear down to 12%, so we have up to 88% wear to use. But we need to know how much WE wear the tires every lap! If the races is 30 laps long, we must complete 31 laps (30 race plus formation). So 88% divided by 31 laps means 2.84% wear per lap. But how do I know how quickly MY setup and MY driving is wearing the tires every lap?!

Luckily there are various way and tools to do this

1) Easy/accurate: Run a race distance
The simplest option is chuck on your tires and drive a full race. That takes time, but confirms whether tires will last or not!
Legends advice: This tells you how long that set of tires will last at that track, with that setup and that fuel load. It is very reliable, but also time consuming. Also if you tested softs, you don't know how hards will last. So it's easy, it works, but it's not efficient.


2) Easy/rough estimate: Just use the HUD
One of the display options in RFactor shos tire wear - green, yellow and red. This is a VERY rough way to gather the data. Basically the indicator shows
Green: From 100% wear down to 81%
Yellow: From 80% wear down to 51%
Red: Below 50%
So first of all when the tires go red, you have 38% usable wear left. Secondly, if you can see how many laps it takes for one of your tires to turn yellow, you know that's how long it takes for 20% wear. So if one/both rear tire(s) turning yellow in 5.5 laps, the rear tires will last for 5.5 / 20 x 88 = maximum 24 laps.
Legends advice: Very easy, but risky as it gives quite rough data. In many cases that will be fine, but in cases where you want to use hard tires and they


3) Difficult but very precise: Use MOTEC
For those who know the MOTEC data gathering tool, you can get precise data of each tire's wear. This data is gathered lap by lap, and you can see precisely what is going on. This allows you to know exactly by how much per lap your tires are wearing, and make a very precise strategy.
Legends advice: MOTEC is a superb tool for those who want to use it, but it takes some installing and setting up. Too much work for many people.


4) Easy but very precise: RFDynHud
Simple but effective. The RFDynHud tool allows you to make data overlays. It can be configured to show those only in practice sessions but not in the race. One of the overlays shows precisely the level of wear remaining for each tire. It also shows the percentage of the initial grip remaining (smaller number in brackets - although we don't need this number, as already confirmed vua CarStat). This is a perfect tool, as you can drive 5-10 laps (more laps becomes more accurate), see precisely what the wear number is, and scale that number up to a full race distance. You can then repeat that with hard tires, and you can then know how long each will last.
Legends advice: This is the holy grail. Precise information, quick, and easy to use. Recommended. This tool can also be configured to show precise fuel consumption per lap, so it's perfect for knowing the exact fuel load you will need.


So, we know the tires. We know how to use them. And we know how we are wearing them. So, what do we do with this information? Let's put it together and consider