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

  • This topic has 35 replies, 23 voices, and was last updated 10 years ago by Laddie-147.
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  • July 22, 2013 at 6:53 am #19420
    MattFr

    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.

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  • July 22, 2013 at 3:38 pm #749021
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    chrismday

    KiwiMike wrote:I swapped from

    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?

    July 22, 2013 at 1:40 pm #749019
    0
    700c

    Double check frame clearance
    Double check frame clearance is enough for 28’s first! Also some 25’s have wider profile than others (Vittoria open corsa as mentioned in 25c appears a very wide and round profile,.it will only just fit in one of the bikes I’ve put them on..

    Conventional wisdom is 23 for racing,.I understand. (I don’t race), but comfort is not as much of a factor, they are a little lighter, plus unless you don’t get the more aero limitations on conventional width rims (bulge of tire over and above brake track width)

    Marginal gains and all that…

    But this is just theory, and if you prefer to be comfortable you might find wider is more beneficial than narrow tires

    July 22, 2013 at 8:23 am #749017
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    KirinChris

    If you want one tyre for both
    If you want one tyre for both then open tubs are not the best option – you might be lucky but they would be best used as a racing tyre, with latex tubes.

    Vittoria Corsa or Veloflex, with lovely gumwall sides.

    For 25mm tyres which are good as training and racing I like Vredestein Fortezza. Continental do their GP 4000s in 25mm but I’ve never really been impressed with Conti.

    July 22, 2013 at 8:04 am #749015
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    PJ McNally

    I regularly ride 25mm or
    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.

    July 22, 2013 at 7:29 am #749013
    0
    KiwiMike

    I swapped from 23 to 28
    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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