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23 or 25mm Clinchers to race and train? Which clinchers to choose?

by MattFr
Mon, Jul 22, 2013 07:53
35

I know I'm going to get all sort of responses, but I'm currently thinking of going to 25mm tyres after a number of people have told me the advantages of the lower rolling resistance. What I'm wondering is would you use them for both racing and training? And I guess does rider weight (64kg) make a difference to tyre choice?
Also what would be the clincher of choice? In an ideal world I'd opt for an open tubular type for best, and a cheaper training tyre, but I'm not sure this is an option at the moment.

If you're new please join in and if you have questions pop them below and the forum regulars will answer as best we can.

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35 comments

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PJ McNally | 11 years ago
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I regularly ride 25mm or 28mm, and i'm no heavyweight (63kg).

More comfy than 23mm, in my admittedly limited experience. And they don't seem to slow me down.

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KiwiMike | 11 years ago
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I swapped from 23 to 28 (Gatorskins) 6 months ago. Apart from only having had one flat in over 3,000km, I'm faster and have no more wrist/bum pain from vibration on poorly-surfaced roads. I follow the 15% drop rule - http://goo.gl/fkCwA - so for a 70kg rider + 10kg bike, I run 80psi rear / 50psi front.

This might be heresy to those who 'know' different, but the science says 15% drop and a larger tyre means same or lower rolling resistance, less fatigue, and fewer punctures.

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chrismday replied to KiwiMike | 11 years ago
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KiwiMike wrote:

I swapped from 23 to 28 (Gatorskins) 6 months ago. Apart from only having had one flat in over 3,000km, I'm faster and have no more wrist/bum pain from vibration on poorly-surfaced roads. I follow the 15% drop rule - http://goo.gl/fkCwA - so for a 70kg rider + 10kg bike, I run 80psi rear / 50psi front.

This might be heresy to those who 'know' different, but the science says 15% drop and a larger tyre means same or lower rolling resistance, less fatigue, and fewer punctures.

That's very interesting; so you've not had any issues with pinch flats or damaged rims hitting the edges of holes with such low pressures?

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KiwiMike replied to chrismday | 11 years ago
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chrismday wrote:

That's very interesting; so you've not had any issues with pinch flats or damaged rims hitting the edges of holes with such low pressures?

Sorry, just saw this 3

No pinch flats here, or on any of the club bikes running 28's at similar pressures.

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joemmo replied to chrismday | 11 years ago
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chrismday wrote:
KiwiMike wrote:

I swapped from 23 to 28 (Gatorskins) 6 months ago. Apart from only having had one flat in over 3,000km, I'm faster and have no more wrist/bum pain from vibration on poorly-surfaced roads. I follow the 15% drop rule - http://goo.gl/fkCwA - so for a 70kg rider + 10kg bike, I run 80psi rear / 50psi front.

This might be heresy to those who 'know' different, but the science says 15% drop and a larger tyre means same or lower rolling resistance, less fatigue, and fewer punctures.

That's very interesting; so you've not had any issues with pinch flats or damaged rims hitting the edges of holes with such low pressures?

That is interesting, I run 28s on my commuter bike and have found 80psi on the rear about right for the rear just by trial, error and feel - which more or less tallies with the chart. I tend to run the front higher than the 60 recommended there though, too many deep, sharp edged potholes to risk lower.

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