I wouldn't get one at all.
I used standard road tyres for over 4 years before recently changign to a direct drive trainer, with the exception of trying a trainer tyre in the hope of a noise reduction at one point maybe 3 years ago. I tried it for a couple of months before disposing of it. It slipped horrendously more than either the Continental or Felt tyres I've generally used and made zero perceptible difference to noise, particulate shedding, or any other potential benefit.
As far as I'm concerned, trainer tyres are a gimmick.
If you are having serious slippage at 250W than I reckon your tyre/roller is contaminated. Any chance you've managed to get something like a tiny trace of chain lube or sweat infused with sunscreen, or something on the tyre? Unlike road use, there's nowhere for a contaminant to go, it'll just get spread around. It's not going to get wiped off by the road, or absorbed by grit. It'll be rolling on the exact same surface a moment later. I had this issue on one occasion and it was a b#'&h to get rid of. It caused lots of slipping even at relatively low power. However, the rest of the time I had no issue with slippage except occasionally for the first few pedal strokes of a sprint when I'd expect to be doing 600-1000W.

I should add for context: I was using a KK Road machine which has an aluminium alloy roller. Grip characteristics will undoubtedly differ for plastic/elastomer rollers. I can't say whether this changes things, but I still doubt a trainer tyre is the best solution.

Both the tire and the trainer are brand new but I suppose it couldn’t hurt to just wipe everything down in case of some factory coverings or dust.

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I still lapped everyone on the couch!

Wipe things down with alcohol and a clean rag.

I get slippage on my KK with both an old road tire and a trainer tire (Different bikes). But have learned to control it so I don't. (I treat the control as I need to for power surges when racing the MTB).

I found it well worth the money to pick up a vittoria zaffiro indoor tire. Been on the trainer wheel a couple years with no issues

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Banger

get a tannus solid tire

Continental trainer tires have worked great for me.

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Let food be thy medicine...

^^this^^ We have thousands of miles on ours over the last 2-3 years & they look like new. I vote for the Vitorria hands down.

What trainer tire are you using that you’re getting slippage with??

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Swimming Workout of the Day:

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Vittoria Zaffiro trainer tire has served me very well for years without any issue. Plenty of traction and seems to last forever.

A note of caution.

Twice I have had to replace the tube on these tires. When you ride for 2.5 to over 3 hours...make sure you unlatch your trainers roller from contact with the tire itself. When you ride, a tremendous amount of heat builds up on the roller. If you stop after a three hour training ride and let the hot roller sit on the tire...that heat transfers directly to the tube.

My wife has this tire on her zwift trainer...and after the second time mapping out where the tube failure happened...I figured it out that she stopped with her pedals in a particular position each time she rides...and the contact point where the roller met the tire is where the failure occurred. Both times were after ~3 hour rides.

Ever since she has unlatched the zwift roller from the tire so where was no contact.....and not a failure since.

So just a heads up.

Cheers
Collin

The design of the roller seems to me to be massively important here. I had an elite trainer which used rider pressure only to keep the wheel in contact with the trainer. Elite uses an 'Elastogel' coating which is optimized for use in combination with trainer tires and it really did work. Compared to a normal tire slippage was marginal to non-existant. I have also had Performance Bike own brand fluid trainer where slippage was an issues not matter what I tried. This trainer used a clamping mechanism to put pressure on the rear wheel and it has to be super tight to prevent slippage.

I also found the Performance bike trainer ate tires as evident by the tire dust bits I would find all around the trainer. I mostly used Tacx indoor tires which have a very clear blue colour. I used the Elite trainer for nearly 10 years pretty heavily and always with the same tire.

I think this is why there is always a strong split in opinion over trainer tires. In some case they are worthless and in others they are very helpful. There are comments on this thread about heat and again I think that is turbo specific. My recommendation is to use a trainer tire if you use the trainer a lot and have a dedicated wheel you can just leave the tire on. If you are constant having to change the tires around because you need the wheel for both indoor and outdoor riding its much more of a hassle. If you only use the trainer every now then I also wouldn't mess with a trainer tire unless your trainer is coated, like the elite ones, to specifically mate with a turbo tire.

maybe if I post a picture too it will make much more sense to you why to use this tire on a trainer (tannus solid tire)