Bora Clinchers; run 23s or 25s?

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cmcdonnell
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by cmcdonnell

wonkeu wrote:i prefer 25mm to 23mm. if you are not a professional rider, it might be safer than 23mm. just in my experience.

Safer? How do?
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danbjpa
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by danbjpa

i think 25mm be safer for rim in puncture case (less exposed to grind on tarmac)

jacobeh
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by jacobeh

Sorry to be bringing up an old subject, but I recently got a pair of Bora 50's and used this thread for deciding what tire to buy and went with the Conti 4000s II 23mm, but contrary to previous poster's experience, mine only measure 23.8mm at 100 psi. Does anyone know if Conti has made changes to this model since this thread was made? If so, their 25mm model might be of interest if it is more closely to 25mm than previous.
Last edited by jacobeh on Sat Jan 20, 2018 5:43 am, edited 1 time in total.

sawyer
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by sawyer

jacobeh wrote:
Thu Jan 18, 2018 10:04 pm
Sorry to be bringing up an old subject, but I recently got a pair of Bora 50's and used this thread for deciding what tire to buy and went with the Conti 4000s II 23mm, but contrary to previous poster's experience, mine only measure 23.8mm at 100 psi. Does anyone know if Conti has made changes to this model since this thread was made? If so, their 25mm model might be of interest if it is more closely to 25mm than previous.

As a bonus the pair only weighted 199g and 208g respectively compared to the official 215g.
No changes
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Nohands83
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by Nohands83

jacobeh wrote:
Thu Jan 18, 2018 10:04 pm
Sorry to be bringing up an old subject, but I recently got a pair of Bora 50's and used this thread for deciding what tire to buy and went with the Conti 4000s II 23mm, but contrary to previous poster's experience, mine only measure 23.8mm at 100 psi. Does anyone know if Conti has made changes to this model since this thread was made? If so, their 25mm model might be of interest if it is more closely to 25mm than previous.
I’ve just put a set of the new (wider) attack / force on my bora 35s and they measure, 25.40mm front and 26.7mm rear. So pretty much what you’d expect from Conti’s. Was on a set 25/28c set of Vittora corsas G+ previously. The attack / force weighed in at 370g for the pair so took a cool 155g off in the process. Will see how they ride at the weekend ;)

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pdlpsher1
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by pdlpsher1

jacobeh wrote:
Thu Jan 18, 2018 10:04 pm
Sorry to be bringing up an old subject, but I recently got a pair of Bora 50's and used this thread for deciding what tire to buy and went with the Conti 4000s II 23mm, but contrary to previous poster's experience, mine only measure 23.8mm at 100 psi. Does anyone know if Conti has made changes to this model since this thread was made? If so, their 25mm model might be of interest if it is more closely to 25mm than previous.
The 23mm on my Bora measures 24.7mm. Perhaps they will stretch a bit after some use. I run 90psi on mine. By the way I run 23mm on the front and 25mm on the rear.
Last edited by pdlpsher1 on Tue Feb 13, 2018 8:02 am, edited 1 time in total.

jacobeh
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by jacobeh

pdlpsher1 wrote:
Tue Feb 13, 2018 8:02 am
jacobeh wrote:
Thu Jan 18, 2018 10:04 pm
Sorry to be bringing up an old subject, but I recently got a pair of Bora 50's and used this thread for deciding what tire to buy and went with the Conti 4000s II 23mm, but contrary to previous poster's experience, mine only measure 23.8mm at 100 psi. Does anyone know if Conti has made changes to this model since this thread was made? If so, their 25mm model might be of interest if it is more closely to 25mm than previous.
The 23mm on my Bora measurs 24.7mm. Perhaps they will stretch a bit after some use. I run 90psi on mine. By the way I run 23mm on the front and 25mm on the rear.
That's what I've been thinking as well considering I've only used them on my hometrainer so far (Danish winter...sigh)

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Frankie - B
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by Frankie - B

jacobeh wrote:Sorry to be bringing up an old subject, but I recently got a pair of Bora 50's and used this thread for deciding what tire to buy and went with the Conti 4000s II 23mm, but contrary to previous poster's experience, mine only measure 23.8mm at 100 psi. Does anyone know if Conti has made changes to this model since this thread was made? If so, their 25mm model might be of interest if it is more closely to 25mm than previous.
Etrto guidelines state that the size of a tirecan deviate 3mm both ways. So, you struck one from a badge stat is close to the size.
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Greatestalltime
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by Greatestalltime

I’m getting some Bora 50’s. Is there a consensus on 23 v 25?

Comfort isn’t a factor for me as most of my rides are under 40 miles

jacobeh
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by jacobeh

I ride 23mm front and 25mm rear - reason being the 23mm on front should be more aero and the 25mm rear gives slightly more comfort and possibly puncture protection. This is with the newer Conti GP 5000 (tubes)

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Greatestalltime
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by Greatestalltime

Thanks. Yeah. I’ll be on clinchers. Curious what most like and why

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pdlpsher1
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by pdlpsher1

Now running 28mm GP5K on both front and rear. Feels great. Don't care about the minor aero loss. The GP5K 28mm are similar to width of the GP4k 25mm.

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Greatestalltime
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by Greatestalltime

Does anyone have GP5000 25 mm measurements? Are they closer to actual than the 4000s?


Sent from my iPhone using Tapatalk

jacobeh
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by jacobeh

Greatestalltime wrote:
Wed Apr 01, 2020 8:00 am
Does anyone have GP5000 25 mm measurements? Are they closer to actual than the 4000s?


Sent from my iPhone using Tapatalk
On my Bora Ultra 50s, the 25mm at 6bars measure 25.2mm, so pretty spot on :thumbup:

Renault78law
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by Renault78law

cmcdonnell wrote:
Wed Apr 20, 2016 11:18 am
wonkeu wrote:i prefer 25mm to 23mm. if you are not a professional rider, it might be safer than 23mm. just in my experience.
Safer? How do?
Campagnolo specifies a minimum tire size of 25mm in compliance with ETRTO standards.

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