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PBK Contis heads up, get your road tires for the season
 

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Sparky
Joined: 08 Dec 2003
Posts: 19068
Location: PDX

3/19/13 9:08 AM

PBK Contis heads up, get your road tires for the season

$35.77 for 4kS 700x23C

http://www.probikekit.com/us/continental-grand-prix-4000s-clincher-road-tyre.html?utm_source=ENPBK-_March19&utm_medium=email&utm_campaign=ENPBK-_2093339929&affil=thgemail

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BobB
Joined: 13 Jan 2004
Posts: 171
Location: Columbus, OH

3/21/13 2:57 PM

Also Mich pro4 and Vittoria Rubino Pro

Thanks for the tip Bob. PBK has both of these on sale too, and in my new favorite width, 25mm. I picked up some of the MichPro4s ($33) to replace my aging pro2s. Several long-distance riding friends swear by the Rubino Pros ($23). YMMV.

http://www.probikekit.com/us/

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Rickk
Joined: 01 Jun 2004
Posts: 528
Location: Montreal

3/21/13 5:27 PM

Slightly cheaper at Ribble

with (and even without) their 10% off code, for those Contis (and Rubino pros)

but... free shipping to North America only after spending 250 UK pounds
:-(

http://www.ribblecycles.co.uk/pp/road-track-bike/road-triathlon-track-folding-tyres/tyrf

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Sparky
Joined: 08 Dec 2003
Posts: 19068
Location: PDX

3/21/13 5:42 PM

The Rubino link for 23.## did not work the other day.
It did when I clicked on the link you put in your message.

I ordered some 25mm in Black, will give them a try...

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BobB
Joined: 13 Jan 2004
Posts: 171
Location: Columbus, OH

3/21/13 7:47 PM

Riding wider 25mm (really 27mm) tires -- what pressure?

After mounting wider 25mm tires, I used this spreadsheet based on Frank Berto's research to determine the appropriate tire pressures:

http://www.biketinker.com/tire-pressure-calculator/

I was surprised how low the recommended pressures were.

The measured width of my Michelin Pro2 25mm tires is 27.6mm (my 25mm Gatorskin and Serfas Seca tires are about 26.5mm). I hope actual measured width is what the spreadsheet expects. At 27mm and 190# for bike and rider, the spread sheet says 81lb Rear and 65lb Front. I use a little more, 90lb rear and 70lb front. So far after about a year of riding, no pinch flats. I think I get a great ride. Riding on Ohio's chip and seal roads is much nicer. I don't ride fast enough (LOL!) that the additional frontal area of the wider tires makes any difference to my top speed. I don't ride aggressively and most of those miles were on my commuter, which has Mr Tuffy tire liners that also might help prevent pinch flats.

One note about this spreadsheet. Apparently all users are using the same spreadsheet at the same time. I believe I have watched values on the spread sheet change with no input from me. Make sure your inputed values are the same before you write down the result.

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