[Closed] Soz, tyres: Spesh slaughter - squirmy ?

If it's not a GRID, then yes, Spesh non-GRID tyres are squirmy as hell, if run tubeless. Ok with a tube in and 30-35psi ime.
Slaughter GRIDs are superb in the dry otherwise. Unless, of course, you're one of those extreme downhiller types what can't get enough braking out of em cos of the SEMI-SLICKness of them. LoLZ

As Dez days, Grid ain't squirmy. Haven't tried control casing.

hmmmm, it is a GRID
p'raps I'll pump it up a bit

Unless, of course, you’re one of those extreme downhiller types

makes you think ...

I had these on my rigid bike, non GRID. They needed like 30-35psi to stop them bouncing as I pedalled fast. Replaced them with Schwalbe and I now run 23psi without bouncing or squirming, which obviously makes a huge difference.

I'm 14 odd stone, run Grid version around 20-25psi, not squirmy or bouncy

Run ours at 24 psi on the rear, Grid casing. Swap them out when we get the winter glop. You need to commit to get the side knobs working in the corners but never had one squirming.

Great summer tyre IME (grid version). Got one on the back of the Soul and it just works, rolls pretty fast and is surprisingly tough. 28psi for me at 10stone, no squirming.

(Obviously not a mud tyre - but you’d guessed that, right?j

I've got 27.5 in 2.6 and 2.3. Both grid. Both seam to be extremely sensitive to pressure. A 2 psi too soft and they squirm.

I have 27.5 x 2.6 Slaughter Grid and anything under 22psi feels horribly squirmy to me.  I’m about 11 stone.  I don’t think the grid casing is as stiff as it used to be or maybe I shouldn’t have gone for the 2.6?

BTW I do like them as a summer rear, just know all about it if I’ve been lax in checking my tyre pressures

Thanks all - never used a profile like this before so maybe it's just the transiton "up" onto the knobs that feels weird. Lke I said, actual grip seems OK but there is a definite step which I suppose would be right, just from looking at them

been out to the garage - my (uncalibrated 😉 ) track pump says it was, well

err

quite low actually 😳

so either I do have a slow leak or didn't do the squish test properly

The old Grid casing was a lot stiffer in the sidewalls than the Grid Gripton casing. That's why the Blck Dmnd was released and then the new Grid Trail.
Probably the reason Specialized was selling off the Grids and Controls at silly prices

Really liked the 2.6" 27.5 on my mulleted Stumpy Evo but it was too fragile (tore 2). Hope it reappears in BLCK DMND casing then it'd be near perfect as a fast summer tyre.

Do your sidewalls leak?

Grid and trail casings here and both are just covered in leaking sealant blobs, each ride sees more...

Mine squirmed something rotten. Took it off . Don’t think it’s a grid. Glad it isn’t just me.

Tell a lie, it’s a purgatory.

Run Stans in ours and Stans Race in daughters. She uses Blck Dmnd casing and the rest of our bikes are a mixture of Grid and Grid Trail. Not had a problem with leaking side walls but have had a couple of them that the Stans has turn to the consistency and colour of tea.

I had a 2.3 Grid on a hardtail and then a 2.6 Grid on the Geometron. As others have said, very pressure sensitive. Good rolling speed, good corner grip but never felt fully 'right' or 'planted'. It's a hard thing to explain.

Also, definitley very squirmy on faster DH type trails or if you're hitting berms hard enough to squash them.

running a 2.8 on 35 internal at 14ps. it might roll a bit if i'm being lazy sitting down on the road but other than that great tyre IME.

28psi for me at 10stone

That's 'rock hard' in my book.

Not sure how much I weigh at the minute but if I go any lower than 25psi indicated on my track pump, then I'll be running on the rim on every compression. I do spend as much time as possible off the ground though.

These people who run 14-18psi, surely you're just rolling along a beach on a fat bike? It can't be 'mountain biking' surely?

The 2.3 Grids are a lot less pressure sensitive than the 2.6 ones but both benefit from foam inserts to add damping and stability.

Would you not have to run a semi-slick at a reasonable pressure so that it runs on the slick bit ? Surely if you run too low a pressure you would end up running on the side knobs defeating the whole point of a semi-slick

I ran a 2.3 of the older one and it's been great, no squirm at all at about 22psi.
However, I bought a new Purgatory Grid and holed it within a week on the most innocent of descents. As above, I think they've changed the carcass. I used to love Spec Tyres for their value and performance, but I'm going back to Schwalbe and Maxxis now.

I run my 2.6 as around 25psi minimum (94kg) too. Anything less it just squirms too much.

They felt quite squirmy last night, but on investigation it turns out i was riding on "mud" which i'd forgotten existed until recently.

i can't speak for your track pump sharkattack but mine was indicating ~ 5psi over according to the topeak gauge i have. the absolute number isn't that important of course so long as you're measuring consistently but + tyres run lower pressures across the board. do a squeeze test and you'd think my + tyres were at the same pressure as anyone else's regular 27.5 or 29er. i set my rear tyres at pressures that will rim out if i get it very wrong but will otherwise give a bit of bounce and give on the hardtail - chameleon with 36s in this case. for comparison i run 14 or 15psi on a nobby nick front and 18 or 19psi rear on-one chunky monkey both in 2.3 guise on 29er rims on the same bike. i ran 18 front and 23 rear on my 26er chameleon i found out after i got the topeak gauge.
i weigh 70kg and try to ride with some mechanical sympathy, and the trails i typically ride at the mo i know very well indeed, however the rear hope enduro rim that has three decent sized dents in it suggests i do get it wrong sometimes. small drops and jumps, roots, loam, and flint. lots of flint. i run a lighter tyre up front but wouldn't use anything without 'some' protection such as exo on the rear - i'd just kill it. on the 26er until i went tubeless i used to run the maxxis heavier duty ( but not DH spec - the halfway house ) inner tubes on the rear because i was repeatedly pinching it.
i'm an amateur like the vast majority on here but you're very welcome to come for a ride and tell me if it's 'proper mountain biking'.
i have a 29er slaughter to go on the rear of these new rims i have when i've built them, so that'll be of some interest to me at least. 😀

Grids on my stumpy Evo were squirmy as a squirmy thing!
Replaced them with newer Grid trails all was squirm free!

"I run my 2.6 as around 25psi minimum (94kg) too"

Where did you get a 2.6 Slaughter from? Was it 29"

@HoratioHufnagel

Not had the best experience with mine (29x2.6 Butcher Grid front/29x2.3 Ground Control Grid rear). The front is squirmy unless the pressure is just right, settled on ~22psi, but the grip is good. Running ~25psi on the rear which seems to be a good balance between squirm/grip. On my second rear though as literally 20km into the first ride I slashed/popped a 2 inch tear across the carcass of it on a fairly innocuous rocky trail. Might have been bad luck but I've never done that sort of damage to another tyre and I wasn't riding particularly hard. Think I'll stick with them until they wear out as they're riding okay now I've fiddled with pressures, and then go to another brand.

Another weird thing is both the 2.3 and the 2.6 come up at exactly the same size (~2.45") on 30mm rims, anyone else found that?

I had to move my Eliminator Grid 2.4 to front only duties as found it squirmed on hardpack surfaces too much.
Had to put closer to 30psi in it at BPW to sort that out. Great tyres otherwise but i'll not bother with anything as lightweight out back now.

No issues on my normal trails, but I don't like swapping any weekend we might decide to go to a trail centre.

Would you not have to run a semi-slick

See that's the thing! They haven't got a bloody slick bit.. hence NOT being a s.. oh sod it.

i`m runnign a 2.3 DH slaughter at about 25-30PSI (13 st) no squirming. have heard a few rim clonks, but no dinks, so about right pressure wise.

i had an 2.6 eliminator grid on the rear before but had to take it off i couldnt get it to stop squriming or burping or i had to pump it up hard.

previously i've run 2.3 butcher grids everywhere and loved them. i did warp a purg grid once. but as with all these things its a bit of a comprimise between weight, stability and pressure.

I'll stick to dh casings on the rear of the HT from now on i think. just feels nicer.