zipp 303 clinchers

gazeds
gazeds Posts: 182
edited October 2014 in Road buying advice
Best size continental gp4000 for 303's 23 mm or 25 mm

Comments

  • BeaconRuth
    BeaconRuth Posts: 2,086
    23mm.

    Ruth
    http://www.rutheyles.co.uk/
  • DKay
    DKay Posts: 1,652
    The blindingly obvious answer (or rather, question) is, what are you changing from and what do you want from new tyres? i.e. more comfort, less weight, more protection.
    N
    N+1
  • ugo.santalucia
    ugo.santalucia Posts: 28,312
    30 mm

    Nikki-Terpstra-659x440.jpg
    left the forum March 2023
  • gazeds
    gazeds Posts: 182
    DKay wrote:
    The blindingly obvious answer (or rather, question) is, what are you changing from and what do you want from new tyres? i.e. more comfort, less weight, more protection.
    Did'nt you understand my post. What size continental gp4000
  • thegreatdivide
    thegreatdivide Posts: 5,807
    I run 23mm Veloflex on my 303 FC's but my pal runs 25mm Vittoria's. I think Zipp say run 23's for a more aero shape...

    We're on tubs btw.
  • northpole
    northpole Posts: 1,499
    gazeds wrote:
    DKay wrote:
    The blindingly obvious answer (or rather, question) is, what are you changing from and what do you want from new tyres? i.e. more comfort, less weight, more protection.
    Did'nt you understand my post. What size continental gp4000

    I'm in the camp of not understanding your question - the clarifications requested (and highlighted by Ugo in his response) make complete sense.

    Incidentally I run 23mm on my 303FC - 25's don't fit my bike!

    Peter
  • Grill
    Grill Posts: 5,610
    gazeds wrote:
    DKay wrote:
    The blindingly obvious answer (or rather, question) is, what are you changing from and what do you want from new tyres? i.e. more comfort, less weight, more protection.
    Did'nt you understand my post. What size continental gp4000

    Bro, no one understands your post.
    English Cycles V3 | Cervelo P5 | Cervelo T4 | Trek Domane Koppenberg
  • gazeds
    gazeds Posts: 182
    northpole wrote:
    gazeds wrote:
    DKay wrote:
    The blindingly obvious answer (or rather, question) is, what are you changing from and what do you want from new tyres? i.e. more comfort, less weight, more protection.
    Did'nt you understand my post. What size continental gp4000

    I'm in the camp of not understanding your question - the clarifications requested (and highlighted by Ugo in his response) make complete sense.

    Incidentally I run 23mm on my 303FC - 25's don't fit my bike!

    Peter
    I'll try and explain, I'm purchasing a pair of Zipp 303 carbon clincher's, what size of continental grad prix 4000sII tyre's would give the best performance.
  • ugo.santalucia
    ugo.santalucia Posts: 28,312
    23 will be marginally more aerodynamic, 25 will have better rolling resistance if you are heavy. Both effects are very marginal and can be counteracted by eating one extra raisin in your porridge
    left the forum March 2023
  • gazeds
    gazeds Posts: 182
    ugo.santalucia wrote:
    23 will be marginally more aerodynamic, 25 will have better rolling resistance if you are heavy. Both effects are very marginal and can be counteracted by eating one extra raisin in your porridge
    At last, thank's Ugo. What length valve's would I need for the 303's
  • ugo.santalucia
    ugo.santalucia Posts: 28,312
    gazeds wrote:
    ugo.santalucia wrote:
    23 will be marginally more aerodynamic, 25 will have better rolling resistance if you are heavy. Both effects are very marginal and can be counteracted by eating one extra raisin in your porridge
    At last, thank's Ugo. What length valve's would I need for the 303's

    The 303 are 45 mm deep, so 60 is the very minimum... I'd probably get a longer one though
    left the forum March 2023
  • thegreatdivide
    thegreatdivide Posts: 5,807
    ugo.santalucia wrote:
    gazeds wrote:
    ugo.santalucia wrote:
    23 will be marginally more aerodynamic, 25 will have better rolling resistance if you are heavy. Both effects are very marginal and can be counteracted by eating one extra raisin in your porridge
    At last, thank's Ugo. What length valve's would I need for the 303's

    The 303 are 45 mm deep, so 60 is the very minimum... I'd probably get a longer one though

    I stick a 40mm extender on a 38mm valve so 80mm all in is fine.
  • undapressure
    undapressure Posts: 116
    According to Zipp, 23mm front and 25mm rear is the best combination for aerodynamics and reduced rolling resistance - http://www.zipp.com/support/faq/faq.php

Categories