On Sun Jul 6 12:03:34 2025 Frank Krygowski wrote:
On 7/6/2025 8:00 AM, Roger Merriman wrote:
cyclintom <cyclintom@yahoo.com> wrote:
On Fri Jul 4 23:02:34 2025 Frank Krygowski wrote:
On 7/4/2025 1:47 PM, Mark J cleary wrote:
I have been riding my rim brake Habby the past month really. Putting >>>> many miles with warm temps low wind. I notice the rear conti PG5000 was >>>> looking quite flat profile in the middle to tire. I ride it at about >>>> 83-93 psi and it is a 25mm tire. Have had no flats with the tire but >>>> looking at the dimple marks on the tread they were barely visible had to >>>> really look good.
i decided with the profile flat and wear markers gone to replace it. i >>>> wondered when most of you replace tire. I have heard a number of rider >>>> say they go till the chords start showing or they start getting a lot >>>> flats. To me one flat is too many so I changed it out.
I don't if it is just me but on todays ride I though the bike road
better. I assume that a rounded tire profile is better than the flat bit >>>> in the middle?
I don't think I can get a 28 mm tire on the bike but not sure the 25 is >>>> fine. Maybe I should investigate closer.
I think I generally ride until the first casing threads are barely
showing. I can't say I detect any difference in ride quality, but I'm
far from being a connoisseur of such things.
If I were leaving on a long trip, I'd replace a worn tire sooner than
that, before starting out. In fact, most of my long tours were started >>> on fresh tires.
I forget touring bike tires but racing/sports tires should really be
replaced when the wear markers are comlpetely gone. Beyond this traction is impaired.
Very much doubt traction is impaired, can feel the edge once a tyre has a flat top, but considering how hard road tyres compounds are, soft summer tyres are hard compound gravel tyres for example, and MTB particularly trail/enduro/DH are another level all together.
Running a tyre down to the carcass is unwise for failure type of risks, but in my experience get punctures before that, and a generally slashed up surface.
I can't remember ever having a casing failure of any kind. I remember
one early spring when a friend invited us on our first tandem ride of
the year. We made it about a mile before flatting the rear tire. I was embarrassed to see how badly that tire was worn.
I also don't remember traction problems when road riding, even with wet roads. I guess I corner fairly conservatively; I'd never duplicate
Jobst's famous cornering photo. <https://bikeretrogrouch.blogspot.com/2015/05/jobst-brandt.html>
But I'm not as fearful of gravel in turns as some of my riding mates.
Jobst had all of the roads aeound Palo Alto committed to memory and that was before the Democrats allowed the roads to fall into such terrible disrepair. So he wasn't afraid to blast corners. Unfortunately I picked that bad habit up from him and
sometimes would lead less proficient riders around corners at speeds faster than I should have and scared hell out of them. I took that to heart and slowed my cornering down for them not to meantion the constant problem of cars on county roads might be
in the wrong side of the road for a coming left hand turn. No one was hurt but too many people had been frightened with Jobst confidence.
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