hi, i'm an ex tire compound r&d engineer in Giti, mind to share which tire company u r working with?

Why tyre shop ask me to rotate my tyres for a fee, when they're already rotating everyday when I drive?

We have a beater Saga on 14' for staff attending on-site calls. Is it true there are no good grippy tires for the standard 14" wheel? Seems like they start at 15".

turanza also normal comfort base tires, the real performance stuff is the Potenza series.

If want sporty types tires for smaller size can try get Maxxis or special order Yokohama/Toyo tires from Japan.
If not mistaken i got friend using Yokohama Advan series for 14" kelisa, heard the price not cheap almost 2xx/pcs.

what is the averange max speed for a new tyre to turn a corner without loosing the floor grip?

Speaking of tire and its limit, is there such place as a skid pad in Malaysia where one are able to test the car grip (especially in wet road) in safe environment.

Thank you for clarifying a 'newer' saga vvt has rear torsion beam design, which has no factory adjustment for rear alignment angles.

Yes, older generation saga/wira used to have multi link rear suspension system.

Hi TS, thank you for the response, however I think you might have gotten slightly confused here, my question on no.1 is actually not about grip or loss of comfort. More to tramlining and wobbly / squishy feel. Kindly see my original post (below for easier reference)
I have a few questions which I hope you can assist with.

Background: Std Saga VVT using stock Silverstone M3 175/70/13 upgraded to PS3 195/50/15.

Issues: experiencing tramlining, higher body roll (likely due to softer side walls?), car isnt as composed when breaking hard either.
Only plus points seems to be grip and rather low noise, whereas with the Silverstones it was opposite (ie: higher noise, lower grip especially in the wet but the rest were fine). What gives?
Some times i wonder if the tire shop knew of such things (and thus took the opportunity to sell) or they really think its a safety issue.
Id agree on tolerances. Tire shop said no warranty one lah, Perodua said have but need to deal directly with manufacturer. Manufacturer (Silverstone) has kinda shut down (and they were pushing me back to Perodua), later found out they are now made and handled by Toyo tires, they were of the opinion that it was within spec and normal. All these created a perfect storm since i travel long distance and if 3/4 of my tires had a "bulge" as the tire shop called them, i was not willing to risk a single pop on the highway @ high speeds.
Just a bit of backstory, tires were within warranty period, ran for about 20K km. Now i have 4 extra tires because of this episode.
Eh, i think saga is also using torsion beam so technically there shouldnt be anything to adjust. Not sure if VVT is the same as older models tho.

Hi yes, 220kpa for cold tires, 250kpa for hot/warm,  same across the board for 13-15" but their sticker is for the following:
175/60/R13
185/60R14
185/55R15
Mine is 195/50/15, wonder if i need to increase?

I find that some shops dont really know how to do alignment, driving will feel unengaging, steering not stiff enough and they will say ntg to do with alignment, but those that know they can sort it out. So its a bit of a hard time to get a shop that can do it properly....
Do let me know if you have any suggestions.

Thanks for the heads up.
You're right. A quick search shows 2008 and up Sagas  are rear torsion beam design.
I owned 3 Sagas from 1985 to 1990, IIRC they were all rear multi links but not definite about it.
Any info on rear suspension designs of Sagas from 1991- 2007?
Early Wira's are definitely rear multi link design.

out of topic a bit but for discussion.
how michelin / bf goodrich manage to sell so expensive tyres?
is it because they use premium grade compound/manufacturing process? is it because they invest back into r&d?
i have used michelins before and know what they have to offer. sometimes even more than twice the price of other top 5 tyre brands.

You do know that tire squealing isn't a sign that you are at the limit of grip but more indicative of improper input from the driver when taking a corner and/or bad car alignment and/or under inflated tires.

If the tires are worn down, then yes the tire can start to squeal if you are asking similar lateral G performance from the tire like when it was new. But since you were asking for brand new tire performance this doesn't apply.

So again you might think you are doing things safely since no one is around, but bad alignment/improper inflation can lead to sudden loss of control. If you really want to test your car do it on the track.

Usually if new tires, how long for it to run in before can start pushing it?

For me I will drive normally for 1000 KM before start to push around.

Drive normal = go to work via highway at normal speed

Push around = going around genting as an example

Alignment is ok i guess,it is going straight,but a bit goyang left right above 110,just changed new kyb excel g and myvi gen 3 15 inch rims and pirelli cinturato p1,195/55/15,current pressure 220kpa,do i need to increase pressure?

I’ve been running semi-slicks on public road, and i think I can’t ever go back to normal tyres like pilot sport 5, as that tyre just cannot keep up with my big brake kit, and activates abs so early, really rendering some perks of my bbk useless.

Any unknown downsides on semi slick for public road? I only know

1.tire wear is extremely short (20k if don’t have too much aggressive weekend drives, or 1.5yr~ for tyre life).

2.shitty wet grip, well i take that as a good thing as i’ll slow the fk down when it’s raining, heck even before moving to semislick i already very prone to aquaplane with 275 wide tyre.

3.a need to always make sure/aware of tyre temp/ is warmed up before any huge cornering forces is applied.

4. Nvh? But hell I don’t care about nvh in a car, i got a proper house to properly appreciate a peaceful quiet time, a car is to drive not to live in.

5. Annoys the fuck outta your fellow friends behind you with the amount of sand/stones your sticky tyre will throw at them