ZXR250C Tyre Pressure?

[placidfemme]

Hiya

This might seem like a dumb question (but your used to those from me so it's ok *cheeky grin* )

I've had my bike since Nov last year... possibly longer... and I've never checked the tyre pressure... Me being the smart-ass that I am... saw on my tyre it said "Tubeless" and I took that as meaning... no air!

haha now I'm not sure if thats what it actually means... but as I said... I've never checked them...

So do I need to check them?
If so what is the pressure meant to be?

Thanks in advance

PF

[isDeadly]

hi, the stock preasures state that it should be 28psi front and rear cold, personally I run 35psi front and 35psi rear cold, just look at the sidewalls of your tire for the tires recommended PSI. Goodluck.

[placidfemme]

hi, the stock preasures state that it should be 28psi front and rear cold, personally I run 35psi front and 35psi rear cold, just look at the sidewalls of your tire for the tires recommended PSI. Goodluck.

Sweet thank you...

When you say cold... you mean when the tires are still cold... so a 2 minute ride to the gas station shouldn't be too bad?

Thanks again

[R6_kid:Me]

manual says 30 front 34 rear. but as said depends on tyres.

[placidfemme]

manual says 30 front 34 rear. but as said depends on tyres.

Sweet, well I'll check my tires tonight *didn't ride my bike to work today* and see what the tyres say

[vifferman]

The reason the tyres need to be checked when cold is that as they flex when riding, they heat up, the air expands, the pressure goes up. It's just to give some kind of standard when checking them.

[placidfemme]

The reason the tyres need to be checked when cold is that as they flex when riding, they heat up, the air expands, the pressure goes up. It's just to give some kind of standard when checking them.

Oh ok... The reason why I was asking (Other than the safety reasons) was because I've seen a guy on TradeMe selling pressure gauges to check tyres... they're small compact and could come in handy... so before I brought one ($25 + P&P) I'd check to see if I actually needed one

Thanks for explaining the "cold" thing to me

[vifferman]

Oh ok... The reason why I was asking (Other than the safety reasons) was because I've seen a guy on TradeMe selling pressure gauges to check tyres... they're small compact and could come in handy... so before I brought one ($25 + P&P) I'd check to see if I actually needed one

Thanks for explaining the "cold" thing to me

A tyre pressure gauge is a MUST for a bike, because you're depending on two very small contact patches, and the tyre pressure makes a huge difference to how the bike handles, behaves, etc. F'rinstance, if my front tyre (supposed to be 36) goes below 34, the front wheel wanders, especially on rough seal. If the back gets below about 38-ish, then it feels like the tyre is moving around and slipping, whether or not it is. If your pressures are too high or too low, the tyre will wear unevenly, and may not give you proper grip.
Plus you can't necessarily trust service station pressure gauges, assuming the tyre thingo at the station even fits on your bike's valves (on many bikes, the disks get in the way). At least with your own gauge, you can find out what pressure is right for you, and it should be consistent each time, whether the gauge is 100% accurate or not.

[sefer]

I saw those little thingies too, they look like a good idea, but I'd be dubious about how well they worked until I'd seen or heard of someone testing them. If you think about it, they have to keep your air valve open the whole time to keep checking the pressure, so if the test thing started leaking you'd soon find yourself with no air in your tyres.

[Devil]

Plus you can't necessarily trust service station pressure gauges, assuming the tyre thingo at the station even fits on your bike's valves (on many bikes, the disks get in the way). .

Or you can find one thats right and always use it (like I do - checked via guage. Them digital ones seem fairly accurate).

Placid. Because the tyre pressures affect the bikes so much, its a good idea to check the pressure every time you get on the bike.
When im going on a decent sized ride it always begins with the trip to the petrol station to do the tyre pressures.

[placidfemme]

Thank you

I was looking at this:

http://202.21.128.2/Trade-Me-Motors/...n-31430029.htm

Do you think that would be worth it?

this is what I was thinking of getting earlier... the auction uis closed but the guy had 4 of them and didn't sell any of them...

http://202.21.128.2/structure/auctio...sp?id=31051818

It only goes up to 35psi

[placidfemme]

Ok well I checked my tyres last night...

both front and rear tyre are meant to be at 41PSI.

[crash harry]

The pressures printed on the sides of the tires are not application specific - they are the manufacturers maximums! 41psi is surely too hard.

If the ZXR is anything like the CBR (which I highly suspect it is) you should be running 30-32 psi front and 34-36 psi rear. I would go with the lower end of those ranges, especially if you are light.

I've found those newer gas station air pumps - the electronic ones - to be quite accurate, but beware of the older ones with the gauge on the end of the hose, they get run over and dropped and god knows what, it's amazing they even read at all.

If you haven't checked them since Nov, they're probably at least a bit low, be prepared for a gratifying improvement in handling!

[placidfemme]

Hi

Yeah I've checked them and pumped them up to 41 psi. Thats what the tyre says so thats what I'll do

It does feel better with them at the correct pressure

[placidfemme]

lol Ok, well I took my bike in for its WOF today, and I asked them to check my tire pressure.

Turns out the "41psi" is the MAX limit... not the actual limit...

Back Tyre: 33psi
Front Trye: 31psi