Tube valves

"pistolpete" <[email hidden]> wrote in message
news:[email hidden]...

Quoted message said:

I need to buy some spare inner tubes for my hybrid bike, I've checked
out wiggle and the only tubes (700x35) I can get have a presta valve.
Can someone tell me what's the advantage of presta over car type please
and does it have anything to do with my wheels?

Allegedly prestas are easier to pump up to higher pressures with a hand
pump, the downside is that they can't be inflated (without an adaptor
anyway) with a garage forecourt inflator nor a car foot pump, should you
already own one.

You can use presta valved tubes in a rim drilled for car valves (Schrader)
but not vice-versa.
Some Mavic rims I've purchased have been drilled for schraders but have a
factory fitted plastic reducer inserted for use with prestas.

Bottom line: You can use presta valved tubes on your bike but may need a new
pump if your current one is not adaptable for prestas.
--
Regards,
Pete

pistolpete said:

I need to buy some spare inner tubes for my hybrid bike, I've checked
out wiggle and the only tubes (700x35) I can get have a presta valve.
Can someone tell me what's the advantage of presta over car type
please

Advantages are minor: lighter, easier to inflate with certain hand pumps,
don't need to use a valve cap.

Quoted message said:

and does it have anything to do with my wheels?

The valve holes will be overly large. Prestas can work ok in them
sometimes as they are, but adapter grommets are available.

Should be able to get 700x35 Schrader (car type valve) tubes from your
local bike shop. If not, from.........

www.sjscycles.com/store/vIndex.htm (£5 postage charge on sub £50 orders)

~PB

in message <[email hidden]>, pistolpete

(') said:

I need to buy some spare inner tubes for my hybrid bike, I've checked
out wiggle and the only tubes (700x35) I can get have a presta valve.
Can someone tell me what's the advantage of presta over car type
please and does it have anything to do with my wheels?

We've had that argument a number of times. Allegedly there are a few
very narrow rims around which will only accept presta. Apart from that
the overall feeling of the group is that there's no special benefit;
however, I shall continue to use presta on my bikes, mainly out of
snobbishness.

--
[email hidden] (Simon Brooke) http://www.jasmine.org.uk/~simon/

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