Got a low tyre pressure warning today on the Tessie. Found this.
What do we think the likelihood of being able to repair it is? My concern is how close it is to the sidewall?
As an aside, these tyres have done 29,500 miles so far. Apparently EVs are so heavy and have so much torque that they should have been shredded within 50.
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dan_b wrote: ↑Fri Jun 06, 2025 5:41 pm
Got a low tyre pressure warning today on the Tessie. Found this.
What do we think the likelihood of being able to repair it is? My concern is how close it is to the sidewall?
As an aside, these tyres have done 29,500 miles so far. Apparently EVs are so heavy and have so much torque that they should have been shredded within 50.
Way too close to the sidewall for my liking!
New tyre time I'm afraid.
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Stinsy wrote: ↑Fri Jun 06, 2025 6:03 pm
They look like GoodYear Eagle F1 Asyms. Pretty decent tyre, dire on rolling resistance though.
Conti SportContact are better in all areas except noise if you fancy swapping both sides...
is that why so many cars are so noisy nowadays? And how is dire rolling resistance compatible with energy efficiency? (Maybe the noise from some is the physical manifestation of the energy wasted...)
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AE-NMidlands wrote: ↑Fri Jun 06, 2025 6:14 pm
is that why so many cars are so noisy nowadays? And how is dire rolling resistance compatible with energy efficiency? (Maybe the noise from some is the physical manifestation of the energy wasted...)
Rolling resistance becomes trivial compared to air resistance once at normal speed for a normal car. And yes, noise does mean energy wasted, but again, the "air noise" usually much more than the "tire noise".
As for the "too close to the sidewall?" question, that's for a competent tire repair person to look at. One who might also be able to sell you a tire is unlikely to say "OK to fix" if not.
There is no possibility of social justice on a dead planet except the equality of the grave.
AE-NMidlands wrote: ↑Fri Jun 06, 2025 6:14 pm
is that why so many cars are so noisy nowadays? And how is dire rolling resistance compatible with energy efficiency? (Maybe the noise from some is the physical manifestation of the energy wasted...)
Rolling resistance becomes trivial compared to air resistance once at normal speed for a normal car. And yes, noise does mean energy wasted, but again, the "air noise" usually much more than the "tire noise".
As for the "too close to the sidewall?" question, that's for a competent tire repair person to look at. One who might also be able to sell you a tire is unlikely to say "OK to fix" if not.
around me there are repair places - which also supply - who do repairs for free or a token amount (I've had both) and are banking on the goodwill next time you actually need a tyre or two...
2.0 kW/4.62 MWh pa in Ripples, 4.5 kWp W-facing pv, 9.5 kWh Givenergy batt
30 solar thermal tubes, 2MWh pa in Stockport, plus Congleton and Kinlochbervie Hydros,
Veg, fruit - and Bees!
I used to run Goodyear F1s on my definitely not standard Audi S2 quattro - superb tyre for grip, and as you say, dire for efficiency. I burned through a set of those in under 8k miles once...
These tyres are actually Pirelli P Zero Elec. 235/35/20.
Rolling resistance from tyres has a disproportionately big effect on overall efficiency of electric cars vs ICE cars for the same reason that temperature impacts EV efficiency more than ICE cars - ICE vehicles are so hideously wasteful in the first place rejecting something like 75% of the energy as noise and heat...
Stinsy wrote: ↑Fri Jun 06, 2025 6:03 pm
They look like GoodYear Eagle F1 Asyms. Pretty decent tyre, dire on rolling resistance though.
Conti SportContact are better in all areas except noise if you fancy swapping both sides...
Tesla Model 3 Performance
Oversees an 11kWp solar array at work
My iD4 has ePrimacy all round, they have superb grip and great rolling efficiency. Way better than the OEM Hankooks. Utterly dire in snow though, so I run CrossClimates on the eGolf and use that if it is likely to snow.
Last edited by Stinsy on Fri Jun 06, 2025 10:20 pm, edited 1 time in total.
12x 340W JA Solar panels (4.08kWp)
3x 380W JA Solar panels (1.14kWp)
6x 2.4kWh Pylontech batteries (14.4kWh)
LuxPower inverter/charger
(Artist formally known as ******, well it should be obvious enough to those for whom such things are important.)
A lot of the EVs have body shapes designed for low air resistance. Makes a HUGE difference on the question of whether rolling resistance important. And for THAT, the biggest factor is tire pressure.
I used to be very conscious of that late 60's/early 70's driving a Saab. Since Saab an aircraft company, they had "wind tunnel" expertise in house.Coasting on a grade where my mom's card had a terminal velocity of 35 mph, my brother's Saab would do 55 mph (and of course you were always coasting those, since had freewheel).
There is no possibility of social justice on a dead planet except the equality of the grave.
