Thanks David. I knew it was something straightforward, but it was bugging me that I couldn't remember...
On 14/11/06 19:58, "David Bilenkey" <email@example.com> wrote:
> Latex tubes most likely. Latex is more porous than butyl. Better
> use latex tubes, some of the cheaper ones use butyl. Most clincher tubes
> David Bilenkey
> Ottawa, Ontario, Canada
>> -----Original Message-----
>> From: firstname.lastname@example.org
>> [mailto:email@example.com] On Behalf Of Simon PJ
>> Sent: November 14, 2006 2:49 PM
>> To: Classicrendezvous@bikelist.org
>> Subject: [CR]Simple one: why do sew-ups lose air more quickly?
>> What is it about sew-up tubes that means that they 'leak' in
>> a different way to the tubes in clinchers?
>> Wyndham Pulman-Jones,
>> Girton, Cambs.,