It is all grip, stop causing more confusion.

If want to be precise, you may use lateral grip during cornering and longitudinal grip during braking/acceleration.

Claiming lateral grip should not fair much among different tyres class over different dry/wet is not true and irresponsible. Want to see someone with CR1 follow same speed as PS4 throw into a corner? Dangerous. Or try corner at same speed in wet vs dry? Dangerous.

There are few tyres with exceptional small margin difference in wet vs dry cornering limit, those are outstanding, not everyone have those tyres.

Read this.
https://suspensionsecrets.co.uk/lateral-and...-load-transfer/


Budget and premium types differ greatly in grip in all conditions, not just braking performance. Even different classes of same brand can be totally different.

It is all down to how tyres handle load transfer. Also in a corner, contact patch twist slightly, upcoming contact patch land at slightly different position vs contact patch leaving the ground. This is what give us slip angle, also car without power steering feels lighter when car moves, even it is just rolling a tiny bit.

In a simple rubber at static position, totally grip is pressure applied multiplied by static coefficient of friction.

But in real world driving, it is not static. Tyres is in constant tiny slip all the time, and the rubber grip has diminishing return with increasing load.

This is where good tyres differentiate themselves. They let the driver feels the available grip transition gradually.

Some budget tyres are just snap and car just gone from stable to slide in split second. Low rolling resistance tyres from premium brand, same trouble.

Botak cheap tyres also still can drive in wet and dry if I'm turtle hogging the main road. We can have 100% straight A's in example if we set the A threshold at 5/100.

CR1, CC7, XM2 etc totally not same as touring tyres Primacy4, Prime3, MC6. Then PS4, PS5, PC6, F1 Sport, PZ4 another level. Then SC7, PS4S, PZ4C, Potenza Sport, F1A6 yet another level, best tyres we can buy for daily commute. Next level Cup2, Nankang AR1, RE-71R onwards are semi slick already, I never driven the semi slick group, can't comment.

Then braking performance also different even for 2 tyres hav8ng exactly same braking distance on a same car. What you can read online is the full force braking distance. Maximum load transfer to front wheel. High force pressing on front tyres, and lifting rear tyres. In every day driving comfort (and precise control in spirited driving), we not doing that all the time. We want a linear grip over various load conditions.

This post has been edited by constant_weight: Jun 17 2023, 08:57 AM

Sometitme people read online review see the dB number, which is measured external of then car.

Yea, Primacy is one of quietness tyres on the class. The dB number is higher than budget XM2. But that is not what we experience in car. 100k ish car have better noise insulation than econobox.

Had a 225/45R17 change to PS5 from Prime2. PS5 as a UHP is more quiet than Prime2. Not sure about Prime3.

But, I don't not agree Continental are all noisy. I had PC6 and having SC7. Both are equivalent to PS5 in quietness. And PS5, PC7 tread pattern is very smart (can see the similarity in design philosophy of both brands over last gen tyres tread) near zero noise in smooth pavement.

Having CC6, I think same as Kinergy EX, but XM2 is more quiet than both. But thr ownerships are many years apart, not like PS5 vs PC6 that I have driven both back and forth over long period. Well maybe you are right at the lower end spectrum, when come to UHP, they are very close.

About E class, modern E class are just stiffer than W211 generation. Suspension tuned stiffer overall, tyres profile is just one of the many reasons.

Big rim, thin profile wheel also sensitive to temperature change 2-3psi swing on a hot day, the feeling is super obvious. Had one experience during 42C afternoon, sun was on the right in highway drive. Right side is clearly more bumpy than the left.

This post has been edited by constant_weight: Jun 17 2023, 08:51 AM

Good, since you have SC5, it is easier to explain. PC is premium contact.

In SC5 era, Continental line up is PC5 = Primacy, SC5 = PS4, SC5P = PS4S.

Come to 6th gen. We only have PC6 for Primacy/PS4. They market it is premium Touring + UHP, available from 19" inch. Some claims UC6 compete with Primacy, but it is a very weak product. Maybe UC6 vs Primacy 3. But I'll take Primacy 4/4+ in a heart beat.

Then SC6 = PS4S is the UUHP class, no more SC6P. 7th gen follows the similar except what I suspect maybe there will not have MC7 anymore.

Then MC6 get upgrade from MC5 touring to take Touring/UHP market in smaller wheel size market. I don't have MC6 myself, only driven on my friend's XV a couple of times. Can't beat PS4/PS5 for sure, but still quieter than Prime2. But to be fair one is Crossover, another one is hothatch.

Bear in mind that MC is only available in SEA. They don't sell that in Europe. With the new UC7 closing the gap vs MC6, I feel like we don't need MC7 anymore.

Use UC7 = Primacy, PC7 = PS5, SC7 = PS4S and new yet to release PSS5. Anyone wants a 15', 16" UHP, have to look at Japanese brand tyres.

Please W212 don't use MC6 or UC or don't even use Primacy. Is the car 18" or 19"? 18" go for PS5. 19" go for PS5/PC6. PC7 still limited size and not yet in Malaysia. Guess your dad won't be interested in UUHP. PS5 comfort is same or better than most touring tyres.

This post has been edited by constant_weight: Jun 17 2023, 09:34 AM