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Different tyre size combo, 23 fr 25 rear??

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  • June 28, 2015 at 8:40 pm #24323
    Lee170

    I’m looking for some new tyres for my defy. Thinking of upgrading from the giant PR-2 tyres.
    Already spotted the tyres I want(asked on here)
    Now I’m also a mtb’er and run different sizes tyres front and rear(width)
    Now are there any advantages running a 23mm front and a. 25mm rear?
    I’m currently running 25’s front and rear which are great but just looking to see if there’s any advantages before I hit the order button on a pair of 25’s?

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Viewing 8 replies - 1 through 8 (of 8 total)
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  • July 1, 2015 at 10:54 pm #851735
    0
    PonteD

    I’m running 23 up front and
    I’m running 23 up front and 25 at the back but only because i shredded a tyre the other day and the spare tyre I have is a 25mm. I’ve had 1 ride so far and had no issues, other than the colours don’t match (these things are more important than rolling resistance and comfort).

    July 1, 2015 at 10:44 pm #851733
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    Mrmiik

    A 25 on front is more aero –
    A 25 on front is more aero – no?

    July 1, 2015 at 4:18 pm #851731
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    Anonymous

    That’s what I’m running at
    That’s what I’m running at the moment Michelin pro 4 race 23 front pro 4 endurance 25 rear. Reason for this is the rear tyre needed replacing and wanted to try a 25. Defo like the 25 rear am undecided whether it would make any difference on front

    June 29, 2015 at 1:37 pm #851729
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    Nixster

    There’s nothing wrong with
    There’s nothing wrong with it, I did it for a season. Slightly lower rotating weight, smaller frontal area but marginal at best. If you’re very light then taking into account that there’s less weight on the front you can start to get down to pressures below the recommended minimum running wider tyres, if you use e.g. Sheldon Brown’s calculation method. So narrower can help. Now I run 25 f&r with equal pressures with no ill effects however.

    If you run odd sizes you won’t be able to rotate tyres front to rear when the rear wears out first of course.

    June 29, 2015 at 8:42 am #851727
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    Anthony.C

    I was using those 22 mm and
    I was using those 22 mm and 24 mm Contis on one bike but they wear out pretty quick so I thought I would try 23 mm GP 4000S on the front and 25 mm on the back, on my other bike. It works fine, I don’t need any extra comfort on the front but it’s good at the rear. I have never tried a 25 mm on the front though, so don’t know if 23 mm is any better apart from a possible slight aero advantage.

    June 29, 2015 at 7:18 am #851725
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    vonhelmet

    Continental sell twin packs
    Continental sell twin packs of tyres for this purpose, but theirs are 22mm up front and 24mm at the rear. I think they have different tread patterns as well.

    June 28, 2015 at 10:50 pm #851723
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    fukawitribe

    Can’t think of any real
    Can’t think of any real advantages to be honest – an insignificant aero difference maybe, perhaps marginally less (or more) chance of pinch flats depending on rim size, probably less leeway to get a more comfortable ride on the front, a tad less grip. If I was a betting man i’d say there’s possibly more cons than pros – but it’s not by much either way. I’d go with the 25s FWIW.

    June 28, 2015 at 10:43 pm #851721
    0
    2 Wheeled Idiot

    Nah, I’d say 25 all round for
    Nah, I’d say 25 all round for better comfort, rolling g resistance and handling.
    Having a 23 front may be marginally more aero but such a little difference it would be unnoticeable unless doing very accurate testing…

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