This article contains an affiliate link. If you buy through it, we may earn a commission at no extra cost to you. Learn more.
Most golfers never think about which ball goes into their simulator. They grab whatever’s in the bag and start swinging. But indoors, the ball can change your numbers more than you’d expect, and the right choice depends almost entirely on which launch monitor you own.
The short version: it’s all about spin. Here’s why, and which balls to use with each type of launch monitor.
The quick answer
| Your launch monitor | Ball to use | Why |
|---|---|---|
| Rear radar unit (Garmin Approach R10, Trackman, FlightScope Mevo+) | Titleist RCT (Pro V1, Pro V1x, Pro V1x Left Dash or AVX) | A radar-reflective mark lets the radar measure spin indoors instead of estimating it |
| Rapsodo MLM2PRO | Callaway Chrome Tour or Titleist Pro V1 with RPT | Rapsodo says RPT balls are required to show measured spin |
| Side camera or overhead unit | A clean, consistent premium ball | Camera units read the ball itself, so condition and consistency matter most |
Why the ball matters indoors
Spin drives everything a simulator shows you. Launch monitors use spin rate to work out how high the ball climbs, how far it carries and how much it curves. Get the spin wrong and the shot on screen won’t match the shot you actually hit.
Outdoors, a radar launch monitor can follow the ball for a long way and measure spin as it flies. Indoors, the ball hits the screen a few feet later, which leaves the radar very little to work with. Without help, many radar units fall back on estimating spin from other data.
Camera-based units work differently. They photograph the ball right after impact, so they don’t need a long flight. What they do need is a ball they can read clearly.
Radar launch monitors: Titleist RCT
RCT stands for Radar Capture Technology. Titleist puts a radar-reflective mark on the casing layer under the cover of certain Pro V1, Pro V1x, Pro V1x Left Dash and AVX balls. That mark lets radar launch monitors measure spin indoors. Titleist says it raises indoor spin capture to over 99%.
The best part: Titleist says RCT balls are built the same way as the regular versions and perform identically, and they conform to the Rules of Golf. You’re not practicing with a weird ball. You’re practicing with your normal ball, plus a mark you can’t see.
If you own a rear radar unit like the Garmin Approach R10, this is the ball to look at first.
Rapsodo MLM2PRO: RPT balls
The MLM2PRO uses its own system. Its built-in Impact Vision camera reads a special print pattern on RPT balls, which come in Callaway Chrome Tour and Titleist Pro V1 versions. Rapsodo is clear that RPT balls are required to see measured spin numbers. With a regular ball, you’ll still get data, just not measured spin.
A small sleeve of RPT balls comes with the MLM2PRO. In the U.S., Rapsodo sells additional RPT balls on its own website.
Camera and overhead units: consistency beats everything
Side camera units and overhead units read the ball directly, so the most important things are condition and consistency:
- Use clean, unscuffed balls. Dirt and cuts can make the ball harder to read.
- Stick to one model. Switching balls mid-session makes it harder to compare numbers from shot to shot and week to week.
- Check your manual. Some camera units, especially older or entry models, recommend marked balls or specific ball types. Your launch monitor maker’s guidance comes first.
Callaway Chrome Tour
Good for: side camera and overhead launch monitors, or anyone who wants one consistent premium ball for every session. It’s a tour-level urethane ball, and at the time of writing the regular version is sold by Amazon itself, not a third-party seller.
Note: this is the standard ball, not the RPT version that the Rapsodo MLM2PRO needs to measure spin.
Balls to avoid in a simulator
- Foam or practice balls. They’re great for backyard swings, but launch monitors can’t read them accurately.
- Worn range balls. They’re built differently from course balls and tend to give lower, less realistic numbers.
- A random mix of balls. Different models spin differently, which makes your data inconsistent.
Where to buy them
- Titleist RCT: available from Titleist and golf retailers. You’ll also find RCT listings on Amazon, but at the time of writing they’re sold by third-party golf shops rather than Titleist or Amazon, so check the seller before you buy.
- RPT balls: sold by Rapsodo on its website in the U.S.
- Regular premium balls: widely available, including from Amazon directly.
Frequently asked questions
Can I use RCT or RPT balls on the course?
RCT balls conform to the Rules of Golf and play like their regular versions, so yes. The technology just isn’t needed outdoors. RPT balls are Callaway or Titleist tour balls with a special print, designed for the MLM2PRO camera.
Do I need special balls for a side camera launch monitor?
Usually not, but check your manual. Most camera units work with standard balls in good condition, and some makers recommend specific types.
Are RCT balls worth it if I only hit irons?
If you use a radar launch monitor indoors, yes. Spin matters for every club, and irons are where accurate spin really shows up in carry distance.
Ball recommendations are based on manufacturer information and published reviews, not our own testing. Always follow your launch monitor maker’s guidance.