The Tyre Pressure Thread!

[B7ACKTHORN]

Re: The Tyre Pressure Thread!

Model - Jawa 250 - 353/04
Size - Tyre - F - 3.25 x 16
Size - Tyre - R - 3.25 x 16
Pressure - Tyre - F - ?
Pressure - Tyre - R - ?

If you have trouble finding the right psi, just check the sidewall of the current tire, and see the maximum inflation pressure, and use accordingly.

Cheers!
VJ

[Indu]

Re: The Tyre Pressure Thread!

@B7CKTHORN, yes, there is max pressure mentioned on tyre wall & it is 40 PSI but I don't think I need to inflate tyres anywhere around 40. It is the pressure at which tyre may burst under ideal loading. The ideal pressure will be between min & max pressure.

If I over inflate tyres still within max pressure 40 PSI then, tyre wear will be greater in the centre of the contact area, will also be compromising on ride comfort and there will be tyre noise too.

If I under inflate tyres, then shoulder of the tread will wear out quickly compared to centre of tyre.

I want to avoid all these by inflating the tyre to ideal pressure. If anyone use this size tyre size for JAWA, can you please provide the information. Thanks

[B7ACKTHORN]

Re: The Tyre Pressure Thread!

@B7CKTHORN, yes, there is max pressure mentioned on tyre wall & it is 40 PSI but I don't think I need to inflate tyres anywhere around 40. It is the pressure at which tyre may burst under ideal loading. The ideal pressure will be between min & max pressure.

If I over inflate tyres still within max pressure 40 PSI then, tyre wear will be greater in the centre of the contact area, will also be compromising on ride comfort and there will be tyre noise too.

If I under inflate tyres, then shoulder of the tread will wear out quickly compared to centre of tyre.

I want to avoid all these by inflating the tyre to ideal pressure. If anyone use this size tyre size for JAWA, can you please provide the information. Thanks

Of course you shouldn't inflate it to a maximum. The reason why manufacturer recommends a maximum PSI is to reduce the temperature of the tyre. As a general rule, you should apply it be some 1/4 or 1/8th of the pressure depending on riding conditions. Sometimes even what you think as a the right PSI for summer won't work out for winter situations. Just follow the above rule, see how the bike handles and fix on the same pressure. Of course when you're considering travelling with a pillion you need to add more pressure with added weight.

Cheers!
VJ

[Indu]

Re: The Tyre Pressure Thread!

40/4=10 PSI , 40/8= 5 PSI severely under inflated tyres.. anyone knows the exact pressure to be maintained for these spec of tyres ?

[dustom_99]

Re: The Tyre Pressure Thread!

Of course you shouldn't inflate it to a maximum. The reason why manufacturer recommends a maximum PSI is to reduce the temperature of the tyre. As a general rule, you should apply it be some 1/4 or 1/8th of the pressure depending on riding conditions. Sometimes even what you think as a the right PSI for summer won't work out for winter situations. Just follow the above rule, see how the bike handles and fix on the same pressure. Of course when you're considering travelling with a pillion you need to add more pressure with added weight.

Cheers!
VJ

I work for auto manufacturing giant and have worked with other similar oem previously.
The fact is most of the manufacturer recommend conservative tyre pressure as max/ std pressure.
All automotive tyres for road going vehicles are tested at least 55psi. They need to provide safe n reliable operational life atleast up till 55psi.


Sent from my Micromax A116 using xBhp Connect mobile app

[RiderMan]

Re: The Tyre Pressure Thread!

Model - Jawa 250 - 353/04
Size - Tyre - F - 3.25 x 16
Size - Tyre - R - 3.25 x 16
Pressure - Tyre - F - 18 PSI
Pressure - Tyre - R - 21 PSI, 28 PSI (with pillion)

Above are as per JAWA manual, but in petrol bunks charts there are varied notification like F=20, R=30. May be the experts can point out which is the correct one

[Indu]

Re: The Tyre Pressure Thread!

The PSI provided by you from Jawa manual is what I am also following, but feel the tyres are under inflated, as you said may be I will also let the experts confirm..

[B7ACKTHORN]

Re: The Tyre Pressure Thread!

I work for auto manufacturing giant and have worked with other similar oem previously.
The fact is most of the manufacturer recommend conservative tyre pressure as max/ std pressure.
All automotive tyres for road going vehicles are tested at least 55psi. They need to provide safe n reliable operational life atleast up till 55psi.


Sent from my Micromax A116 using xBhp Connect mobile app

You are absolutely right. The advice to inflate to the maximum pressure is to reduce the running temperature and extend to life of the tire, whereas considerable low pressure aids in good grip and increased wear due to sidewall flex and increased running temperature. If everyone were to inflate the tire at over and above their recommended pressure especially motortcyclists the consequences will negatively influenced.

I never recommend anyone to run on a lower PSI, but the advantages of running over little PSI than the recommended level will aid in good feel and good grip. Too much inflation will negatively impact grip, with the only positive being, increased tire life.

An overinflated tire is equally worse as an underinflated tire.

Cheers!
VJ

[SparKot]

Suzuki GS150R Tire Air Pressure

Suzuki	GS150R
Tire(Tyre)	Make	Size	AirPressure(PSI) Solo	Air Pressure(PSI) with Pillion
Front	MRF NyloGrip Zapper-FS	2.75-18" 42P	25	25
Rear	MRF NyloGrip Zapper-Y	100/90-18" M/C 56P	28	33

[ani_iceman]

Proper tire pressures for 2.75-17 front and 100/90-17 rear tires

Hi guys,

Please let me know the proper tire pressure for following tire specification.

2.75 -17 front
100/90 -17 rear

I carry a pillion.

[B7ACKTHORN]

Re: Proper tire pressures for 2.75-17 front and 100/90-17 rear tires

Hi guys,

Please let me know the proper tire pressure for following tire specification.

2.75 -17 front
100/90 -17 rear

I carry a pillion.

Posting just the tyre size won't suffice in giving you proper inflation buddy. Even modern day bicycles have far greater psi that what a motorcycle tire has. So tell us the model, make perhaps we can come to an approx conclusion.

But for starters, you can find your psi in your owners manual or on the fuel tank or on the swingarm, or the tyre itself. On the motorcycle, you'll see manufacturer recommended tire pressure, on the tire itself you will see the maximum and minimum. If you can let us know that at least, perhaps we can help.

Cheers!
VJ

[ani_iceman]

Re: Proper tire pressures for 2.75-17 front and 100/90-17 rear tires

Posting just the tyre size won't suffice in giving you proper inflation buddy. Even modern day bicycles have far greater psi that what a motorcycle tire has. So tell us the model, make perhaps we can come to an approx conclusion.

But for starters, you can find your psi in your owners manual or on the fuel tank or on the swingarm, or the tyre itself. On the motorcycle, you'll see manufacturer recommended tire pressure, on the tire itself you will see the maximum and minimum. If you can let us know that at least, perhaps we can help.

Cheers!
VJ

Its a Yamaha SZR.

[B7ACKTHORN]

Re: Proper tire pressures for 2.75-17 front and 100/90-17 rear tires

Its a Yamaha SZR.

Litttle Googling gave me the result 29 front, 33 rear

For more like minded fellas, check out this thread.

http://www.xbhp.com/talkies/motorcycle-ownership-experiences/15328-yamaha-sz-x-sz-r-6.html

Cheers!
VJ

[ani_iceman]

Re: Proper tire pressures for 2.75-17 front and 100/90-17 rear tires

Litttle Googling gave me the result 29 front, 33 rear

For more like minded fellas, check out this thread.

http://www.xbhp.com/talkies/motorcycle-ownership-experiences/15328-yamaha-sz-x-sz-r-6.html

Cheers!
VJ

Thanks man. Front is okay(29-30). But about the rear tire I am bit concerned because I ride with/without a pillion and (33-35) seemed a bit sluggish when I give a rip at the accelerator. I spoke to a local mechanic and he suggested me to keep 40 @ rear. Seems better now. I do use the specified tire dimensions only though I have changed from the stock TVS to Ceat. I have posted this too on that thread but no one seems to be active on it. Will try again. I am a noob at all these things so kind of worried.

[B7ACKTHORN]

Re: Proper tire pressures for 2.75-17 front and 100/90-17 rear tires

Thanks man. Front is okay(29-30). But about the rear tire I am bit concerned because I ride with/without a pillion and (33-35) seemed a bit sluggish when I give a rip at the accelerator. I spoke to a local mechanic and he suggested me to keep 40 @ rear. Seems better now. I do use the specified tire dimensions only though I have changed from the stock TVS to Ceat. I have posted this too on that thread but no one seems to be active on it. Will try again. I am a noob at all these things so kind of worried.

Absolutely no problem. As a general rule, if you inflate too much, it will be harder for the bike to grip and though you'll have increased tire life you'll feel hard ride and poor grip when too much inflated. A slight underinflation aids in good grip, sidewall flex and absorbs shocks so you feel smoother ride. Not to underinflate too much, but, again, as I said by two to three PSI would do good.

Cheers!
VJ