Yea in your case Silverstone has closed down and replaced by Toyo. Maybe the buldge we are talking about are different type of buldge - since you seem to imply that 3 of your tires that came with your car has this issue. To me that doesnt seem to be very likely. Tires going to a car manufacturer would need to pass through the tire manufacturer’s QC and then again through the car manufacturer’s receiving QC department before again another round of QC before the car leaves the car factory. So maybe thats why you arent gettng anywhere with your request.

So is Silverstone = Toyo?
Didnt like Silverstone before but I like Toyo now!

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

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.

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

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.

did u pump air pressure according to 13" specs or 15" specs (pls refer any same gen vehicle come with 15")

i suspect alignment as well becos shop only focus on straight line or they may pick a generic saga (different gen) from computer

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.

if modified spring, absorber, lowered, not same alignment specs liao
need to catch back slowly

nobody gave u answer rite. becos they dont play corner

saga never get multi link at all since 30 yr ago

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.