PerixxPERIPRO-303X2A 1.34 Inches Trackball 2 pcs Pack - Replacement Ball for M570, M575, PERIMICE-517/520/717/720, and Other 1.34inches Trackball Mouse - Glossy Red and Green…

I got this ball for the Logitech MX Ergo. The original ball had too much static friction, making it hard to make precise small movements. It would stick, then move too far. This ball has very low friction. It is easy to make small movements. The feeling is very smooth as well. It fits well in the mouse.If anything, I wish the rolling (not static) friction was higher. My thumb sometimes gets tired because this ball moves so easily, you have to engage a lot of thumb muscles to hold the pointer in place at times. This is sort of hard to describe. I personally like the slightly gritty and slower feeling of the blue Logitech M575 trackball better. Sadly you cannot buy that by itself.I recommend this ball. The red looks good in the MX Ergo. It is a deep dark blood red. Not much glitter in it unfortunately. Some room for improvement but largely better than the original silver ball. Price is reasonable, too.

I bought the glossy purple trackball for my gameball mouse. The ball had a lot of friction at first but after spinning it around for 30 seconds and covering it in forhead juice, it is smoother than the old balls I was using. The original ball I was using came with the mouse and the second one was from an old dead mxergo. Feels very smooth and it's purple. Did I mention that it's purple?

I literally just got this, and the difference is incredible. I mean, that probably sounds like an exaggeration, but seriously. I got this to upgrade my Elecom EX-6 wireless trackball mouse. I needed more control for gaming, and more precision for productivity.So to go into detail, the difference is amazing. The original ball that came in the mouse seemed great, it was smooth, and glided effortlessly, but over time would stick. It would slide smooth, but not gradually. In other words, trying to make small movements would cause jittering as the ball would stick and release. Trying to click small buttons, or highlight text characters would be a real challenge, as the cursor would jump across a word instead of smoothly across a few pixels as intended. Trying to aim in games was almost impossible, like the mouse was overdoing every small movement.Now, the upgraded red ball. I chose the smooth glossy one because I wanted smooth control, and that's what I got. Instead of effortlessly gliding, the ball has enough resistance to give you that sense of control, like every movement is intentional. No free spinning. Also, it does not stick. Even on high tracking, when the cursor should move fast, I can still make adjustments one pixel at a time. You have immediate control, rather you want to swipe across the screen, or navigate to an exact point, even a hairpin size point. It's so natural, and effortless, better than I expected.This upgrade was essential, and any mouse it fits in would surely benefit from one of these.Small update, just wanted to say it's been a few days, and I've noticed the experience has been great. My accuracy with the mouse feels effortless now. If that changes over time, I'll update this, but if this doesn't change, you can consider it to still be true. Really glad I got this.

After spending so much money on the Logitech MX Ergo to try and correct some RSI issues I was having, I was quite disappointed with the tracking of the ball. It was just a little too loose, causing it to frequently jump in the housing. I bought this on the suggestion of a random internet stranger, and I could not be happier. This took the mouse from a three star product to a solid five. No more tracking issues, and it is far smoother and better to use. Easily the best trackball mouse I have used now.

I bought this replacement ball for my Logitech MX ERGO, which worked well for me before I accidentally dropped it and subsequently put a pock mark on the original ball. The ERGO still worked but would occasionally get stuck when the support pegs would catch the pock and cause the ball to resist - not enough to really hurt anything but just enough to make digital drawing difficult and just enough to annoy me. This replacement ball has taken care of that for me and has proven to be a worthwhile expense for me.The ERGO and the M570 have the same size ball, so this ball can be used in either (I was using the ball from my old M570 in the ERGO while I waited for this ball to arrive). Replacement is a 30-second procedure and requires no special tools, though a pencil does make getting the old ball out a lot easier.There are two different finish types available, glossy and matte. I chose the glossy in red. Operation has been absolutely smooth with no resistance at all and no catches. I haven’t noticed any operational differences between it and the original gray ball that came in my ERGO. And, in my opinion, the dark red of this ball actually looks a little nicer than the original silver ball as well as the blue M570 ball.This wasn’t an expensive replacement and so far it has worked out very well for me. It has restored operation of my trackball to what it was before I damaged the original ball, which is really all I needed. Based on my experience with it, this is an easy replacement ball to recommend if you need to replace the ball in either a Logitech M570 or an MX ERGO.

Having a variety of colors is good for my artistic soul. The balls are surprisingly slightly different sizes.Sadly, my dark purple one ended up with a bubble. I thought it was a bit of food stuck on it. Attempted to scratch it off, ended up ruining the surface. Because the nodules are so tiny and sensitive, the ball kept getting caught.Was sad to have to toss it.

My concern was they would not fit a standard trackerball mouse but they do. Both work nicely and are a nice color other than the standard red or blue.

Decoration….so far…

Llego en el tiempo indicado. Al MX ERGO de logitech le queda muy bien sin problema, a mi parecer solo 2 colores de los 4 que vienen en el paquete me agradan mas ( rojo y morado), en cuanto a movimiento y presicion no percibo cambio en relacion al gris original. En general me gusto para variarle un poco.

Ho avuto diversi problemi con la sfera originale del mouse Logi MX Ergo: risultava avere alcune irregolarità che impedivano uno scorrimento ottimale della sfera. Questa sostitutiva funziona perfettamente ed è anche leggermente più grande dell'originale, il che la rende più stabile. Al momento mi ritengo soddisfatto!

Replaced a ball in MX Ergo. Silky smooth!

sieht klasse aus.

Been needing a new ball for my trackball for quite a while, found these were compatable and went for the purple one. Great colour and great feel, very happy.