Unidirectional tires

[ramibel]

Marami akong nakikitang kotse na baliktad ang pagkaka-mount ng unidirectional tires. Some were even high-end cars with low-profile tires. Di ko maintindihan kung paano nangyayari yun. If the owners were willing to invest time and money on aftermarket tires, couldn't they at least make sure na tama yung direction nung gulong. Malinaw naman sa sidewall yung "rotation" with an arrow. And how about the shops that mount these tires? Di ba dapat alam nila yun? The purpose of the groove pattern is to facilitate evacuation of water and avoid hydroplaning. Conversely, kung baligtad yung direction nung ikot, wouldn't that encourage pooling of water between the tire and the road surface during wet conditions? Di ba delikado yun?

[umzzzzz]

delikads yan. less traction yan afaik.
















it's like you're running on reverse lagi...

[kewlryds]

running a unidirectional tire in reverse isn't as unsafe as you think. granted that following the recommended rotation reduces chance of hydroplaning, running them in reverse doesn't enhance hydroplaning. water is still evacuated through the thread pattern.

[ssaloon]

mas mabilis lang mapudpod ang tires kung mali ang direction ng rotation.

[kewlryds]

the only downside of using a unidirectional tire in reverse is slightly higher tire noise and less water evacuation capabilities compared to one that's used in the correct direction. thread wear isn't also affected by rotational direction. since the rubber compound doesn't change when it's run in reverse.

[albert_b]

how about yung thread pattern? doesn't that contribute to the proper water drainage?

[kewlryds]

regardless of the thread direction, water evacuation will occur since there are grooves on the tire's surface. under wet conditions, a unidirectional tire that used in reverse will have a slightly lower hydroplaning point (speed) compared to one that is used in the correct direction. unidirectional tires allow for higher traveling speeds under wet conditions but it doesn't mean that they won't hydroplane. they still do but at a much higher speed compared to that of ordinary thread designs.

[squala]

In rotating unidirectional tires, just remount them, flipping them over and putting them at the opposite side of the car to maintain the correct pattern.

[Karding]

it just wont perform the its intended function.

From Yokohama Tire company

Designed to rotate in only one direction, unidirectional tires enhance straight-line acceleration by reducing rolling resistance. The also provide shorter stopping distance. Unidirectional tires must be dedicated to a specific side of the vehicle.

its not the question of "will it disperse water?" but rather HOW much water is dispersed or effective will it perform when not mounted properly on its specific side.

I guess the bottomline is HOW BIG is the chance of hydroplaning when mouted incorrectly. It was designed for a reason.

Yes I can wear my shirt inside-out, but was it designed to wear that way? NO. but does it serve the purpose covering my naked body? YES. But is it the 'proper way' to wear them? NO. But why would you wear a shirt inside-out? Because I can and I dont know better. :2hearts:

nakikita ko din dito yan, A4 na baliktad ang tread pattern. May nakita pa nga akong 7-series na nasa may lip ng rim ang wheel weight blocks :evillaugh

if you dont know the purpose of unidirectional, you may not want to buy/use it because it negates the absolute purpose of such feature.

sabi ni silverbx986 yan, palibhasa naka Porshe kaya pinaniwalaan ko, nyashshahasa

[sirkosero]

diba ginagawa talaga yun sa wheel rotation? baliktad yung wheel pattern para pantay ang pudpod ng gulong? afaik yung direction pointed by the arrow muna kapag bago. tapos after a certain km reading, kapag wheel rotation time na, babaliktarin na para pantay pudpod.

[Karding]

diba ginagawa talaga yun sa wheel rotation? baliktad yung wheel pattern para pantay ang pudpod ng gulong? afaik yung direction pointed by the arrow muna kapag bago. tapos after a certain km reading, kapag wheel rotation time na, babaliktarin na para pantay pudpod.

kapatid, ang cross-rotation eh hindi dapat ginagawa sa unidirectional tires. yung sinasabi mong rotation ay para sa symmetrical tires.

to better understand the proper tire rotation depending on the type of the tire (unidirectional and non-unidirectional) look closely on the 'cross rotation and unidirection rotation'



Im not that good in physics but by just looking at the thread pattern, you dont wanna go "against the grain" when moving forward. subukan mong baliktarin ang timon ng bangka mo, we'll see how well you 'thread the water.' imagine ang kaliskis ng isda eh baligtad din, ano kaya ang mangyayari??? hehehehe

[Karding]

asymmetrical thread pattern aka unidirectional tire:


symmetrical thread pattern:


yan ang disadvantage ng asymmetrical tire, hindi advisable ang cross rotation.

[squala]

To make my post in rotating unidirectional tires clearer:

Example: Originally from left side of the car

1. Dismount tire
2. Turn tire upside down
3. Remount tire and balance again
4. Install on the right side of the car, maintaining correct tread direction
*** Just do the opposite on the other side.

This sure is more costly than symmetrical tires, but cheaper and more efficient than buying new tires already.

[raine]

Marami akong nakikitang kotse na baliktad ang pagkaka-mount ng unidirectional tires. Some were even high-end cars with low-profile tires. Di ko maintindihan kung paano nangyayari yun. If the owners were willing to invest time and money on aftermarket tires, couldn't they at least make sure na tama yung direction nung gulong. Malinaw naman sa sidewall yung "rotation" with an arrow. And how about the shops that mount these tires? Di ba dapat alam nila yun? The purpose of the groove pattern is to facilitate evacuation of water and avoid hydroplaning. Conversely, kung baligtad yung direction nung ikot, wouldn't that encourage pooling of water between the tire and the road surface during wet conditions? Di ba delikado yun?

Kasi minsan yung pinagbibilhan mo ng tire hindi rin nila alam yun, like last sunday bumili ako ng bagong tire sa isang malaking tire dealer sa bacoor cavite. nagilabas yung tire inispect ko kaya napansin ko na meron siyang nakalagay sa wall nito ng rotation direction. nag kinakabit na ng technician yung gulong sa rim tinuro ko sa technician nila na meron direction yung tire kaya dapat iobserved nila merong pang kaliwa at pang kanan, ang sabi sa akin wala naman daw kaya tinuro ko sabi hindi nila alam nameron yun ganoong model ng pirelli kaya minount nanila sa rim observing yung rotation para sa lh and rh tire, at nung ikakabit na sinundan ko uli ayun mali nanaman baliktad nanaman, kaya tinuro ko uli tangal nanaman sila baligtad yung pang kaliwa nilagay sa kanan, kailangan talaga babantayan mo ang mga ginagawa nila kasi parang wala silang pakialam basta makapagbenta lang ng gulong,

[batang_raon14]

Up ko lang. Sensya na kung ni-revive ko ung thread. But it just goes to show that I search before I post.

Anyways, prob with this unidirectional tires. Well, I'm dumbfounded with this existing trend in tires and honest to goodness, initially talaga upon buying my Ziex rubbers eh akala ko design lang talaga sa sidewall ung Rotation na mark.

Problema ko kasi ngaun eh, what if the unidirectional tires were initially mounted in the right direction pero after some casa works eh ni-rotate at ung mga tires eh lahat in the reverse direction na. Nalaman ko lang after naka-travel na ako ng around 600kms. thru the tireboy sa Minerva Tyre Gallery sa Alabang na mali raw ung pagkakamount and kelangan i-rotate otherwise madaling masira ung gulong.

Ngayon na-rotate na nga't lahat-lahat pero pag natakbo ako eh may parang elesi ng electric fan na pinapigilan ng daliri na tunog? At habang pabilis ng pabilis ung takbo eh pabilis rin ng pabilis ung pace ng tunog na yun. Ano po kaya problema?

And para malaman ko lang na correct talaga ung pagkakamount this time around, for example. Left side ng monitor nyo ngaun eh front ng sasakyan at right side naman ung rear. So dapat ung arrow ng rotation eh papunta sa left side at hindi sa kabila di ba?

[boybi]

depends kung nasaan position ng arrow
kapag nasa bandang taas ang arrow, dapat pa-left, kung nasa ibaba naman, dapat pa-right. ;)

[batang_raon14]

Hmm... nalito ako dun chief. Hehe..

Sige ibang approach na lang. Oks, what if ganito ang arrow:



Now, the arrow is pointing to the front of the car, while its tail on the back. So, tama ba pagkamount gaya ng sabi ng tire boy sa Minerva or mali po?

[boybi]

hindi ko makita masyado yung arrow sa pic.

basta, when the arrow is on the top part of the tire, it should be pointing towards the front of the car.

[batang_raon14]

Pero chief pag ung arrow naman is pointing on the bottom part of the tire, ibig sabihin nun dapat pointing to the back siya???

[OTEP]

The arrow points to the direction of the rotation.

Kahit nasa bottom yung arrow and facing the back of the car, it is still rotating in the direction of the arrow.