Do you agree with this tyre pressure calculator?

Goodyear have some new tyres out – the Newton MTF and the Newton MTR. They’ve also got a new online tyre pressure assistant. From our preliminary messings about, it seems pretty useful.

…

By ben_haworth

Get the full story here:

Do you agree with this tyre pressure calculator?

The pressure calculator is just the SRAM one relabelled and made worse by needing to select a Goodyear tyre from the list.

Pretty much spot on with my current pressures.

Pretty much bang on for me, if you can trust the gauge on my track pump but that’s a whole other conversation 😉

Thanks momo.

What do the “rim type” options mean?

Ouch…I’m about 10psi too low on my front and about 13psi too low on the rear with that Sram guide…however, end of the day, if it feels ok then it likely is.

Tyre pressures to 1/10 psi? Really?

Recommend tyre pressures from the calculator are double what I run.

About right for me which means they will be too hard for many on here.

Spot on for the pressures I was running 15 years ago.

Far too hard for me. Recommended 28.5/31.5psi front/rear for me as for a 29×2.3 trail tyre on 26mm internal rims, 88kg rider. I ride with 22/25psi front/rear and a couple of psi less in the wet.

Interesting. It does seem to really up the pressures a bit far when you up the rider weight dunnit?

Seems a couple of psi higher than my normal. Probably means I am not riding hard/fast enough.

Pretty close on the rear, touch high for the front. I’d run less at a trail centre though, but these suit the pointy rocks in the lake district.

seems about right for me. not that any of my pump guages work! i prefer it harder.

About right for the rear (pinch flat avoidance, even with an insert)

5-6psi too high for the front

The new Goodyear Newton MTF and MTR tyres launched this week appear to be something of a simpler range of rubbers.

How many rubbers make it a GoodYear?

It’s reasonably close. If I select wet then they are about 4 PSI higher than I run at both ends

I run about 12psi more than that.
Does it just assume I’m tubeless?

Both front and rear pressures are 8psi above what I run, that’s a 30% increase!

Tyre pressures to 1/10 psi? Really?

My digi gauge goes to 1/10th so the nerd in me means I adjust them to be 21.0, not 21.1 or 20.9. Sad but true.

The SRAM one is about 10 psi above where I run my tyres.

hmmm, it recommends pressures about 20 to 25 percent higher than I typically use.

Maybe we all decided on our tyre pressures based on our pre-lockdown weight?

My only problem with that sram calculator is not knowing how much my bike weighs.

On the lower of two guesses (13.5kg and 14kg) it is pretty much spot on.

Any feedback on the actual tyres?

Shortage of my usual Maxxis DD Assegai/DHR forcing me to shop around.

me 103k
gravel bike, F43c 30psi, R38c 40psi. The calc says 41/52
Hardtail, F2.6″ 20psi, R2.5″ 30psi. Calc 27.1/27.5
Road bike (tubed), F28c 85psi, R25c 95PSI. Calc 80/99

Not to bad apart from the Gravel bike which is well out.

Pretty similar to what I run on the rear. Any lower is pinch flat risk
Front is maybe a couple psi higher than I use… though I don’t monitor it that much.

The SRAM one is a touch higher on the front but about right on the rear

Little point comparing as I’ve never ran a Goodyear tyre and the degree of lying between marketing width and planet reality varies between brands and even between models in a brand. It can even vary between different widths of same model!

I run 23mm GP5000 (that sizes big) @ 95PSI on front and 32mm GP5000 (that sizes small) @ 80PSI on the road bike.

On the commuter, I run 35mm Marathon Supreme (sizes small) @ 60PSI on front and 40mm Marathon Supreme (sizes small) @ 70PSI on rear.

Yes, have been pretty knowledgeable in this field for quite some time and this is very much correct. Wouldn’t have been able to present it more clearly

Tyre pressures are about spot on for what I ride, if I take the Trail/Enduro (which seem the same) as what I run when it’s really rocky and the XC as what I run for UK riding in the woods.

I run higher pressures than some, but no inserts.

(pretty sure the SRAM standard/reinforced/DH has just been mapped across the the Good Year tyres) It’s also pretty close to the Stans model that was doing the rounds a year or two ago. Makes a lot of sense that combined lighter bike and rider would run lower pressures and the differemnce in bike weight is pretty small – The 4-5 kg weight between my Orbea Rise and my enduro bike only increases the pressure by about .5psi.

Nope.

Both SRAM & Goodyear Calculators are well above what I would run even on the hardtail, when I run them higher for more speed & less techy terrain.

Calculator says 28 front, 30 rear, I’ve been running 20 front, 30 rear for a few years now.

Off the back of this, I decided to trial 24 front, 30 rear this weekend, conditions were bone dry, loose powdery ‘mud’ lots of loose rocks over a rocky trail with a few roots (Cafal followed by Twrch at Cwmcarn). Results were positive, didn’t feel any rougher on the small bump stuff, which has been the problem in the past, turn in was a bit more positive and bit into the turns about as well as you’d hope given how powdery it was that day.

I might try 28fr next weekend.