Took my Forza in for an unscheduled oil change today as I planned to take a long trip next week.

During which the technician noted a series of fine cracks in the rear tyre grooves. (pic #1)

They couldn't explain it as the rear wheel/tyre was replaced during the recall mid 2013, therefore the rear tyre has only travelled some 10,000km.

I looked up on the net what could have been the cause? and most attribute cracks in the grooves to ageing.

My immediate thought was they palmed of old rear tyres for free exchange during the recall!

Needed to evaluate the age of the tyre? This code I discovered next to the DOT data on the tyre side wall (pic #2)

The rear tyre infact only 10 months old as the last 4 digits are 0613 (pic #3)

Question then is, what has caused this groove cracking?

Have ordered a replacement tyre, takes 7 days at a cost of THB3,000

This might serve as a 'heads up' early warning to other Forza owners.

Stay Safe!

Cracks like this can happen if you ride around with the wrong tire pressure...

Chuck 'em away. Check the manufacture date on the new ones and buy a tyre pressure gauge so YOU are in charge.........

I agree that looks like tyres that were overpressurised. Might also want to look into whether there is any ozone producing equipment in the area that the bike is stored in; however extensive stop and go traffic in the big mango can cause accelerated webbing like that (wouldn't be the root cause for such 'new' tyres though).

Had this same problem on our Honda Click, when the Honda mechanics wack in over 50 psi in a tire that should only be running 33 psi something has to give!! replaced the front and back tire and now monitor the pressures, mechanics here have no idea about correct tire pressures!

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ozone producing equipment ???? please tell what this equipment would be i am intrigued maybe dim??

At least dont get the same stock tires again guys!

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One good advice is to never and really never trust the pressure indicator at a petrol station. Best you buy at one of the bigger supermarkets a tire pressure gauge for less than 100 THB and you would be saving much more...

At least dont get the same stock tires again guys!

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What's wrong with stock tires on new bikes are they no good?

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At least dont get the same stock tires again guys!

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What's wrong with stock tires on new bikes are they no good?

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Maybe OK but not perfect according to the thread and OP.

Also for 3000 k you might get a better tire I am sure like a better Pirelli.

ozone producing equipment ???? please tell what this equipment would be i am intrigued maybe dim??

Yer, there's a big one thing that causes a lot of damage.....the sun, thunderstorms, the air we breathe, vehicle engine electrics.

Quote from Wikipedia:

"Ozone cracking[edit]

Ozone cracking in natural rubbertubing

Ozone gas attacks any polymer possessing olefinic or double bonds within its chain structure, such as natural rubber, nitrile rubber, andstyrene-butadiene rubber. Products made using these polymers are especially susceptible to attack, which causes cracks to grow longer and deeper with time, the rate of crack growth depending on the load carried by the product and the concentration of ozone in the atmosphere. Such materials can be protected by adding antiozonants, such as waxes, which bond to the surface to create a protective film or blend with the material and provide long term protection. Ozone cracking used to be a serious problem in car tires for example, but the problem is now seen only in very old tires.^{[clarification needed][citation needed]} On the other hand, many critical products like gaskets and O-rings may be attacked by ozone produced within compressed air systems. Fuel lines are often made from reinforced rubber tubing and may also be susceptible to attack, especially within engine compartments where low levels of ozone are produced from electrical equipment. Storing rubber products in close proximity to DC electric motors can accelerate the rate at which ozone cracking occurs. Thecommutator of the motor creates sparks which in turn produce ozone."

Yep wack in the pressure until the spanner bounces of the tire with a nice sound!!

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I asked the car wash guys to put air in my tires.

They all giggled and pointed at me when I checked the pressure with my gauge.

Silly farang.

(Yes. These are the same guys that slather tire shine all over the tire treads.)

I asked the car wash guys to put air in my tires.

They all giggled and pointed at me when I checked the pressure with my gauge.

Silly farang.

Nice twanging noise as the spanner bounces of the tire = pressure gauge!! not sure if it's the same mentality with big bikes and cars but with small bikes there is no thought given!!

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What is this?

A Thai bashing thread?

My experience with Thai people regarding my tires are always positive!

I am also checking my tires time by time and just tell the guys which psi i need and they check the pressure with their meter and do it correctly everytime.

I do this at car tire shops though not small scooter repair shops of course and never use pumps at petrol stations, most have no calibration.

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What is this?

A Thai bashing thread?

My experience with Thai people regarding my tires are always positive!

I am also checking my tires time by time and just tell the guys which psi i need and they check the pressure with their meter and do it correctly everytime.

I do this at car tire shops though not small scooter repair shops of course and never use pumps at petrol stations, most have no calibration.

Sent from my GT-N7100 using Thaivisa Connect Thailand mobile app

Why is it have to be bashing?....I took ones my Audi to the repair shop....check the tires pressure after....one had 70 psi(!!) in it...

What is this?

A Thai bashing thread?

My experience with Thai people regarding my tires are always positive!

I am also checking my tires time by time and just tell the guys which psi i need and they check the pressure with their meter and do it correctly everytime.

I do this at car tire shops though not small scooter repair shops of course and never use pumps at petrol stations, most have no calibration.

Sent from my GT-N7100 using Thaivisa Connect Thailand mobile app

Why is it have to be bashing?....I took ones my Audi to the repair shop....check the tires pressure after....one had 70 psi(!!) in it...

Did you tell them specific pressure for your tire before they start to inflate it?

I always tell them at the beginning and no problems.

Sent from my GT-N7100 using Thaivisa Connect Thailand mobile app

What is this?

A Thai bashing thread?

My experience with Thai people regarding my tires are always positive!

I am also checking my tires time by time and just tell the guys which psi i need and they check the pressure with their meter and do it correctly everytime.

I do this at car tire shops though not small scooter repair shops of course and never use pumps at petrol stations, most have no calibration.

Sent from my GT-N7100 using Thaivisa Connect Thailand mobile app

Why is it have to be bashing?....I took ones my Audi to the repair shop....check the tires pressure after....one had 70 psi(!!) in it...

Did you tell them specific pressure for your tire before they start to inflate it?

I always tell them at the beginning and no problems.

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ive always had a same problems ,tyres with about 65psi in them at yamaha

the teenage boys that work there havent a clue about tyre safety and probably had little to no edcation never mind tyre specific training

i get outside and let half of it out because ive told them but they still think their way is the best way ......TIT

Posts containing derogatory comments toward Thais as well as off topic posts have been removed.

What is this?

A Thai bashing thread?

My experience with Thai people regarding my tires are always positive!

I am also checking my tires time by time and just tell the guys which psi i need and they check the pressure with their meter and do it correctly everytime.

I do this at car tire shops though not small scooter repair shops of course and never use pumps at petrol stations, most have no calibration.

Sent from my GT-N7100 using Thaivisa Connect Thailand mobile app

Why is it have to be bashing?....I took ones my Audi to the repair shop....check the tires pressure after....one had 70 psi(!!) in it...

Did you tell them specific pressure for your tire before they start to inflate it?

I always tell them at the beginning and no problems.

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I do tell them now....than I check...and than...let excess air out...

It's easy enough to check the pressures once the mechanics have finished, but wouldn't it be nice if everything was done correctly in the first place!

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I have the same problem with my dunlops on cbr500. I always check tire pressure i also thought because my bike stands on the sun a lot maybe it dries tyres out

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I go to Maxxis tyre shop at Naklua and have never had a problem in 3 years....but I can understand how other lesser shops can lead to customer problems.

Often it's the Thai way or the Highway!

Maxxis gave me a free tire pressure gauge.

I didn't even make a purchase, just inquiring about some new rubber.

Good people there.