Tyre pressures:Overblown?

[Ame]

Evening BCF

If a tire has 45-60 as a max psi rating,then why does it seem way over the top [at even 20 psi !]

I know the figures above are the 'inbetween' pressures,but it feels like even achieving another 5 psi isnt possible!

I'm using an electric pump and am verifying pressure also with an independent p guage.

Should I keep going??

[RhynoCZ]

Are you sure you are reading the correct numbers?

Also, the range of 45-60 psi is sort of irrelevant. You want to get the pressure, the manufacturer of your motorcycle specifies in the manual. It should be between the 45 and 60 psi range. If you can't do that, you have bought a wrong tyre.
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'87 Honda XBR 500, '96 Kawasaki ZX7R P1, '90 Honda CB-1, '88 Kawasaki GPz550, MZ 150 ETZ
'95 Mercedes-Benz w202 C200 CGI, '98 Mercedes-Benz w210 E200 Kompressor

[Just_James]

In what way does it seem way over the top? Are you trying to go by feel of the tyre?

If you're reading the figures correctly and only have 20psi, then yes you need to keep going. As above, you also need to check what the correct pressure is for the bike.

If your electric compressor is a little 12v thing and is struggling to get any more pressure in then don't be surprised, I've had one set on fire trying to get a little over 30psi in a car tyre!

Best get it to a local garage with a proper compressor if you can or get the good ol' foot pump out
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Current Bikes / Projects: 1999 Rieju RS1 50
Previous bikes - 1986 DT125R (field bike), 1989 KX250, 1980 KX420 (with 500cc big bore), 1992 YZ250, 1988 KX500, 1989 XR250R, 1988 VFR400R NC24, 1999 Cagiva Mito 125, 2008 Rieju RS2 50 , 1993 Honda NSR 125

[G]

[Ame]

JJ,I was thinking the same thing,It cant cope much above 20,I even left it cool down for 15 minutes or so,so thats probably the problem.



I'll use the garage comp I think!

[delsol]

Bulkier than a mini 12v pump, but will get the job done, and quicker than you might think.

https://www.machinemart.co.uk/shop/product/details/fp200-twin-barrel-foot-pump?da=1&TC=SRC-tyre%20foot%20pump

https://www.machinemart.co.uk/shop/product/details/clarke-fp300-twin-cylinder-foot-pump?da=1&TC=SRC-tyre%20foot%20pump

You can buy the single piston variants of the above, but meh! apart from a space\weight saving versus volume of air discharged, I don't see the point, and hardly a cost consideration either.

[doggone]

Most road bike tyres want to be be around 36psi, the manual will tell you.
Off road style tyres 20 or 25 is likely.

Although garage airlines aren't guaranteed accurate checking it there would give yo an idea if your pump is knackered or the gauge on it is wrong.

There are a few threads about buying a decent separate gauge - they aren't expensive and should last for years.

[G]

You can get good and bad little pumps.

I bought one for taking around Europe on the bike.
It was useless. One the same size that came out of a maplins jump starter was excellent and easily pumped up two tyres to 30-35.

[misscrabstick]

Ignore what is written on the tyre sidewalls with regards to pressures, always go by the bike makers specs.

Get yourself a little pocket sized pressure checking gauge made by PCL or a well known maker.

Never trust garage airlines for accuracy or anything from China attached to an electric pump.