Road tyres....are you led astray?

[Paul Ruinaard]

Nice calculator app i found:

 

https://itunes.apple.com/us/app/itire-pressure/id522048073?mt=8

 

From Vittoria

[NotSoBigBen]

Why can't people wait till Friday anymore, flipping microwave generation ????

 

Sent from my LG-D958 using Tapatalk

[rudi-h]

gatorskins have poor rolling resistance, has lousy grip in the rain and likely a bit heavier than other brands...

 

BUT

 

we live in SA...  this means we rarely need to ride in the rain (so the grip issue is pretty much dead), we have shyte roads which means gators have superior puncture resistance to any of the serious racing tyres out there and only the top 1% of cyclists out there put enough watts out to fully take advantage of the marginal gains in terms of weight and rolling resistance..

 

moral of the story, gatorskins are a perfect fit for 99% of the south african market.  In my case i'm now about 10000km puncture free which is a significant improvement to spending every third saturday on some sidewalk with tyre levers...

 

If you are one of the 1% that requires/needs/wants something different, it only makes sense that you'll have to look harder for a suitable product.

[Goodbadugly]

Genade maar julle roadies is geniepsig.

And here I sat thinking a road tire was round and black

[Eugene Oppelt]

Genade maar julle roadies is geniepsig.

And here I sat thinking a road tire was round and black

Bunch of peacocks

['Kaze Pete]

Why can't people wait till Friday anymore, flipping microwave generation

 

Sent from my LG-D958 using Tapatalk

What do you mean?  This is a week of Fridays!  

Best we catch a coffee again, don't you think?

[Jase619]

Waiting till Friday is impossible when you have a burning passion to flaunt your opinion on anyone who will listen. . .

[Spoke101]

No offense. I work in IT as well and often have the same experience.

 

Like a SQL DBA that believes best practices are reference guides and suggestions :-).

 

Like it was said - start at the manufacturer's site. Rim widths also need to be taken into account. But i assume he is using very narrow rims already.

 

Actually,  Mr Spoke 101 -  a frame that can only take 21mm - that has sent all sorts of questions off in my mind as well. What sort of frame and rim combo and what is the I/d of the rim? I would be interested in seeing that as well. Does Not compute.

 

But there is so much more to this than pressure and puncture/square edge resilience - handling etc would be a nightmare, even if slightly wet on an overinflated tire. 

 

Seems we all work in IT.

First off you might want to read my earlier reply because you have your wires crossed.

 

But I will repeat it for you, There was never any cracked frame and I never said that the frame can only take 21mm tyres. It can take 23mm but when new they tend to rub a little and anything thicker than tracing paper on the tyre will get stuck between the frame and tyre.

 

Now to answer your most resent question: Frame: 2012 Cervelo S5 VWD. Wheels: Dura Ace 7850 C50 Tubular. 

 

What you fail to see is that while your recommendation might be valid there are to many factors to be sure unless you do a specific test with my complete setup.

Further more if I followed your advise I would most probably have been stuck at the side of the road on Sunday with a puncture or cracked rim.

[SwissVan]

Why can't people wait till Friday anymore, flipping microwave generation ????

 

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It's kind of cute how hubbers always manage to swallow the whole hook, line and sinker when it comes to certain topics.

 

Wheel size, tyres in particular.... it must be something to do with human nature and going around in circles

[Spinnekop]

It's kind of cute how hubbers always manage to swallow the whole hook, line and sinker when it comes to certain topics.

 

Wheel size, tyres in particular.... it must be something to do with human nature and going around in circles

Once you get to step out of the box (Comes mostly with age and experience) and are able to see this, it is a thing of beauty! 

 

Al-innie-rondte......   

[Li Mu Bai]

Snip

 

4.) There was never a cracked frame, it was the braking surface of the rim that cracked.

Snip.

The rim probably cracked due to the over inflation of the tire. If it was a clincher, definitely. 

Check what that rim was rated to withstand.

[SwissVan]

The rim probably cracked due to the over inflation of the tire. If it was a clincher, definitely.

Check what that rim was rated to withstand.

Hmmm highly unlikely

The psi limit is more likely linked to the rims capability to hold onto the tyre bead I.e to prevent the tyre coming off the rim.... but that's my guess ????

 

Can't believe I got sucked into this thread

 

Hat, coat and logout

[Spoke101]

The rim probably cracked due to the over inflation of the tire. If it was a clincher, definitely. 

Check what that rim was rated to withstand.

 

As stated numerous times above it was a Tubular so impossible to crack no matter the pressure.

The rim had visible damage from where the tar edge of the pothole contacted the rim.

If I had been running a higher pressure in the tubbie it might have saved the rim.

[Spoke101]

Hmmm highly unlikely

The psi limit is more likely linked to the rims capability to hold onto the tyre bead I.e to prevent the tyre coming off the rim.... but that's my guess

 

Can't believe I got sucked into this thread

 

Hat, coat and logout

 

That is partly true as well as blowing the braking track/sidewall off the rim.

 

Go have a look at the GCN youtube Zipp factory tour. They used a clincher rim and I think it only blew out at 320 PSI that's 22 Bar so 11 is not going to have any effect.

[Jase619]

That is partly true as well as blowing the braking track/sidewall off the rim.

 

Go have a look at the GCN youtube Zipp factory tour. They used a clincher rim and I think it only blew out at 320 PSI that's 22 Bar so 11 is not going to have any effect.

I would love to see someone attempt to pump a tyre to 22 bar. . .

 

Makes sense though that they would build a safety margin into it, 22 bar is way above what most mere mortals pump their tyres to

["Stevens"]

I do quite enjoy the comments of the many ""sharp" hubbers, ...without....this site would be boring.

 

I have paid school fees with over inflated tyres.   One burst in two places during a race and a MTB one just popped of a rim.   Hence using tyres that can handle the pressure.

How critical are tyres for motorcycle racing?  Bicycles typically do the same thing.

If you only ever stick to Gatorskins because the dudes at the bike shops push them, and 70 of the 78 members (sheep) in my social bike club use them,......then you not qualified to really comment.

 

That said you are entitled to rant and protect your tyre of choice. 

PS I run my track tubby at 7.5  not 9