Tyre question

Ben1980
Ben1980 Posts: 21
edited August 2016 in Road buying advice
I'm looking to take advantage of the current sales on a new set of tyres to replace my stock Giant defy but I'm undecided on 25's or 28's, I looking for a faster rolling and more comfortable tyre, I'm pretty much set on the Continental GP 4000S II but scratching my head on size.

Comments

  • lincolndave
    lincolndave Posts: 9,441
    You won't go far wrong with the 25mm gp4000s, these are slightly oversized any way, and give a very comfortable ride
  • keef66
    keef66 Posts: 13,123
    But if your bike has plenty of clearance for 28s then why wouldn't you?
  • Ben1980
    Ben1980 Posts: 21
    Lincolndave wrote:
    You won't go far wrong with the 25mm gp4000s, these are slightly oversized any way, and give a very comfortable ride

    Oh didn't know they're oversized, by how much do you know ?
    keef66 wrote:
    But if your bike has plenty of clearance for 28s then why wouldn't you?

    Being a Defy disc bike I'm sure there's clearance for 30's so no problem fitting 28's.

    Very hilly in my area so would 28's be ok for climbs ?
  • bbrap
    bbrap Posts: 610
    Oh didn't know they're oversized, by how much do you know ?

    Mine come out at 27.6mm on DT Swiss R23 rims.
    Rose Xeon CDX 3100, Ultegra Di2 disc (nice weather)
    Ribble Gran Fondo, Campagnolo Centaur (winter bike)
    Van Raam 'O' Pair
    Land Rover (really nasty weather :lol: )
  • marcusjb
    marcusjb Posts: 2,412
    ^ sounds about right, 25mm GP4000s ii come out at pretty much exactly the same size as 28mm 4 Seasons in my experience. They are massive!

    So be careful with clearances. I use 28mm in most of my bikes, but I think I would struggle a little with 28mm GP4000s ii
    Stuff about riding a bike a long way
  • Ben1980
    Ben1980 Posts: 21
    Cheers for the info, 25's it is :)

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