Tyre Pressure

garyhere

Hi
I hope someone can help with a question about tyre pressure.
I've noticed since I've had my bike, a Crossfire 2 from Halfords that the tyres seem to go a bit flat after a couple of days commuting.
Last night I inflated them to 70psi. After riding 9 miles today the pressure is down to 60.
Do I have a slow puncture?
I'm taking the bike in for its 6 week service tomorrow and don't want to look a prat asking them about it.
Thanks in advance.

asprilla

Tyres do lose pressure over time. Mine will generally fall from 110psi to 80psi over the course four or five days. However, losing 10psi over 9 miles is quite a lot.

It could be that you let quite a bit of air out when removing the pump or something like that, or it could be a slow puncture. The best idea is to buy some spare innertubes and a puncture repair kit and learn how to fix things yourself, it will make life much easier in the future as puncture, I'm afraid, are a fact of life.

garyhere

Hi Asprilla
Thanks for the reply.
I bought a spare inner tube, puncture repair kit and the Haynes Bike book last week.
I used to repair punctures on an old racer when I was younger no problem, but I think, unlike riding a bike, changing an inner tube is something I have forgotten. :oops:
I will keep an eye on the pressure for another week or so and then maybe have a practice run at removing and replacing the inner tube.
Thanks again.

sc999cs

garyhere wrote:

Hi Asprilla
Thanks for the reply.
I bought a spare inner tube, puncture repair kit and the Haynes Bike book last week.
I used to repair punctures on an old racer when I was younger no problem, but I think, unlike riding a bike, changing an inner tube is something I have forgotten. :oops:
I will keep an eye on the pressure for another week or so and then maybe have a practice run at removing and replacing the inner tube.
Thanks again.

Best to learn now and not in the winter when it's cold, dark and wet (although looking out the window at the moment...)