I do appreciate the pictures on Rivendells site that shows the calipers,
tire and rim all in one shot, makes it a bit clealer and seems a simple
system for at least having some baseline.
On Jun 11, 2014 1:13 AM, ted ted.ke...@comcast.net wrote:
More or less, and whether 2mm out of 32 should be
This matches my experience. I bought the G.B. Cerf and they grew from 27
to 29 mm after about 1 or 200 miles. The 27 fit my old racing bike, the 29
didn't! I love them on my Ram though.
Michael
On Tuesday, June 10, 2014 8:52:09 PM UTC-4, joe b. wrote:
Hi Anne,
Also keep in mind that
Very good point, Deac - I've noticed with Challenge and Vittoria open
tubulars, which are rated for wide pressures, they stretch like crazy with
a few days a high pressure.
On Tuesday, June 10, 2014 8:01:44 PM UTC-5, Deacon Patrick wrote:
Try inflating them to max pressure for a night or a
My Parigi Roubaix measure 30 mm on older Open Pros.
On Wed, Jun 11, 2014 at 3:39 PM, Michael Hechmer mhech...@gmail.com wrote:
This matches my experience. I bought the G.B. Cerf and they grew from
27 to 29 mm after about 1 or 200 miles. The 27 fit my old racing bike, the
29 didn't! I love
my Strada Biancas mesure 33mm on Synergy
On Wednesday, June 11, 2014 4:50:54 PM UTC-5, Patrick Moore wrote:
My Parigi Roubaix measure 30 mm on older Open Pros.
On Wed, Jun 11, 2014 at 3:39 PM, Michael Hechmer mhec...@gmail.com
javascript: wrote:
This matches my experience. I bought the
All Tires measure differently on different rims. Open Pro rims are only
19.5mm wide, whereas the Compass Grand Bois rims , which are likely what is
used to measure them, is 23mm. That difference will make the same tire
appear to be different widths .
Also, how one is measuring the tire
That's about a 6% discrepancy, which certainly seems reasonable given
different rim widths and tire stretch.
With abandon,
Patrick
On Tuesday, June 10, 2014 4:52:31 PM UTC-6, Anne Paulson wrote:
If you order some of Jan Heine's tires, be aware of a size discrepancy.
I just got a couple of
It's 6% in diameter, but that makes 12% difference in volume, which is what
we care about.
On Tue, Jun 10, 2014 at 4:56 PM, Deacon Patrick lamontg...@mac.com wrote:
That's about a 6% discrepancy, which certainly seems reasonable given
different rim widths and tire stretch.
With abandon,
Hi Anne,
Also keep in mind that tires (it SEEMS like especially light, supple ones)
grow in width over the first couple hundred miles. Don't be surprised if
the GBs relax out to 32 or close after some riding.
Best,
joe broach
portland, or
On Tue, Jun 10, 2014 at 5:31 PM, Anne Paulson
Try inflating them to max pressure for a night or a few days and see where
there are.
With abandon,
Patrick
On Tuesday, June 10, 2014 6:31:44 PM UTC-6, Anne Paulson wrote:
It's 6% in diameter, but that makes 12% difference in volume, which is
what we care about.
On Tue, Jun 10, 2014 at
The first few hundred miles is just what these tires will be getting real
soon now. I'm off on a 600+ mile sagged trip across California starting
Thursday. I expect they'll be everything everyone says about them.
On Tue, Jun 10, 2014 at 5:52 PM, Joe Broach joebro...@gmail.com wrote:
Hi Anne,
I would think we care about effective spring rate (cush) and how much
additional travel is possible before getting a pinch flat. Aren't those
driven by the contact patch size, its derivative, and the height of the
tire? How does cross section area (or volume) drive those?
Are you sure this is
The effective spring rate is going to depend on volume, isn't it, because
the volume says how much air there is and that determines how much
compression there can be? And the contact patch is going to depend on
diameter, isn't it?
The derivative of the contact patch with respect to what?
On
The derivate of contact patch area with respect to drop.
I think the support force is roughly psi times contact patch area. I think
that though the internal pressure may increase slightly that effect is
negligible because the change in tire volume is a tiny fraction of the
total. I think the
So you're saying, then, that low-pressure tires compress not because the
air pressure inside them changes, but because the tire deforms in response
to a force and the air pressure inside it remains more or less the same.
You say it behaves like a spring and we should analyze it like a spring.
So
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