Tire depth

scott5scott5 Posts: 83
edited September 2019 in Workshop
Hi all,
I put a continental gp4000 tire the rear wheel of my orbea orca. I noticed after the first ride that I only have about 5mm between seat stay and tire. It used to be about 1cm gap. Still it rolls ok.
My question is can you get a shallower tire in size 28?

Posts

  • david7mdavid7m Posts: 610
    The 4000s are bigger than stated.
  • Go for a 25 and leave the massive wallowing but oh so on trend tyres alone. Or buy a marketing bike
  • Ben6899Ben6899 Posts: 7,091
    Just run 23s at 100psi.

    It's funny how we look to reduce our frontal area as much as possible on TT setups - or even just in general (I don't bother) - but then opt for fatter tyres with increased frontal area
    Ben

    Bikes: Donhou DSS4 Custom | Condor Italia RC | Gios Megalite | Dolan Preffisio | Giant Bowery '76
    Instagram: https://www.instagram.com/ben_h_ppcc/
    Flickr: https://www.flickr.com/photos/[email protected]/
  • cougiecougie Posts: 22,512
    Ben6899 wrote:
    Just run 23s at 100psi.

    It's funny how we look to reduce our frontal area as much as possible on TT setups - or even just in general (I don't bother) - but then opt for fatter tyres with increased frontal area

    But the orca isn't a TT bike.

    And seriously a slightly fatter tyre ?
    I doubt that would even be measurable in the real world.

    If you're advising someone on their hour record all well and good but for British roads - you need the extra air cushion.
  • cougie wrote:
    Ben6899 wrote:
    Just run 23s at 100psi.

    It's funny how we look to reduce our frontal area as much as possible on TT setups - or even just in general (I don't bother) - but then opt for fatter tyres with increased frontal area

    But the orca isn't a TT bike.

    And seriously a slightly fatter tyre ?
    I doubt that would even be measurable in the real world.

    If you're advising someone on their hour record all well and good but for British roads - you need the extra air cushion.


    I think need is a bit strong.
  • Ben6899Ben6899 Posts: 7,091
    cougie wrote:
    Ben6899 wrote:
    Just run 23s at 100psi.

    It's funny how we look to reduce our frontal area as much as possible on TT setups - or even just in general (I don't bother) - but then opt for fatter tyres with increased frontal area

    But the orca isn't a TT bike.

    And seriously a slightly fatter tyre ?
    I doubt that would even be measurable in the real world.

    If you're advising someone on their hour record all well and good but for British roads - you need the extra air cushion.

    That's why I said even just in general. I don't worry about aero (I run squidgy 25s on my Gios) and I don't think anyone should worry about aero unless they're competing and looking for very marginal advantages.

    At the same time, I think putting 28s on a race geometry road bike is a bit unnecessary and is mainly a result of what's deemed to be on-trend.

    EDIT. OP, I'm trying to advise that you go back to the 25s or 23s if you're concerned. With no detriment to performance (probably marginal improvement).

    Saying that, 5mm is sufficient clearance.
    Ben

    Bikes: Donhou DSS4 Custom | Condor Italia RC | Gios Megalite | Dolan Preffisio | Giant Bowery '76
    Instagram: https://www.instagram.com/ben_h_ppcc/
    Flickr: https://www.flickr.com/photos/[email protected]/
  • svettysvetty Posts: 1,903
    Ben6899 wrote:
    cougie wrote:
    Ben6899 wrote:

    That's why I said even just in general. I don't worry about aero (I run squidgy 25s on my Gios) and I don't think anyone should worry about aero unless they're competing and looking for very marginal advantages.
    Or riding with their mates and trying not to get dropped when the stronger riders put the hammer down :D
    FFS! Harden up and grow a pair :D
  • A 5mm gap is fine, no need to change tyres.
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