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Bicycle help



happypig

happypig

Staring at the rude boys
May 23, 2009
7,972
Eastbourne
My son has outgrown his bike and so is going to use mine, which has sat unused for 3/4 years.
The tyres were flat so I just tried pumping them up but every time I do, the tyre pops off the rim.
Am I missing some arcane secret known only to bicycle repair men, or are the tyres knackered (and if so should I replace the tubes as well) ?
 






glasfryn

glasfryn

cleaning up cat sick
Nov 29, 2005
20,261
somewhere in Eastbourne
I'm in Eastbourne and used a guy who is located on lottbridge grove
both tyres,both inner tubes and a service £30

WHEELS 07427685995
 




T

TomandJerry

Well-known member
Oct 1, 2013
11,491
Wheel LOOSE

rqto0haIdak-mountain-bike-jump-lose-a-wheel-gifsu.com.gif
 




C

Chris45

Member
Jul 29, 2010
130
Try pushing the valve up slightly while pumping it up, could be the inner tube trapped under the tyre rim and pushing it off.
 








S

sebtucknott

Active member
Aug 22, 2011
317
Shoreham-by-Sea
Most tyres have a steel wire bead, the bit that sits in the rim (wheel), it would be very unlikely for this to perish.

Some tyres/rims can be not quite the right size for each other, too big or too small.

If the tyre is coming out of the rim when you're pumping it up try this -

- Turn the bike upside down so there is no weight on the tyres
- Pump the tyre up enough to have shape but still moveable, about 5-10psi
- Reposition the bead into the rim if it has come out
- Carefully pump the tyre up some more
- Reposition again if necessary
- Pump the tyre up to your desired pressure (30-40psi)
- Job done!
 


happypig

happypig

Staring at the rude boys
May 23, 2009
7,972
Eastbourne
sebtucknott said:
Most tyres have a steel wire bead, the bit that sits in the rim (wheel), it would be very unlikely for this to perish.

Some tyres/rims can be not quite the right size for each other, too big or too small.

If the tyre is coming out of the rim when you're pumping it up try this -

- Turn the bike upside down so there is no weight on the tyres
- Pump the tyre up enough to have shape but still moveable, about 5-10psi
- Reposition the bead into the rim if it has come out
- Carefully pump the tyre up some more
- Reposition again if necessary
- Pump the tyre up to your desired pressure (30-40psi)
- Job done!
Click to expand...

I did this and now have a functional bicycle.
I said to the boy "there you go" and he replied "thanks but it's too late now, I might go out sunday"
 




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