big tyres on small rims?

swampi101
swampi101 Posts: 210
edited August 2009 in MTB buying advice
I currently run a 2.1 on front and rear, but Im looking at getting 2.4 on the front and a slightly bigger rear too.

However Ive seen people saying for the bigger tyres you need wider rims, is this true? And will it be much of a problem to move up to bigger sizes?

Comments

  • Andy B
    Andy B Posts: 8,115
    Why do you want to use a 2.4 tyre?

    Yes you do have to use an appropriate rim for a tyre, depends on what rims you have as to what tyre you can use

    Will a 2.4 fit in your frame/forks with clearance?
    2385861000_d125abe796_m.jpg
  • swampi101
    swampi101 Posts: 210
    my rim is just over 1" wide, would that be ok or too small for a 2.4 tyre?

    I just measured my frame and forks, the max I could go on rear is 2.2, but fork will take 2.5.
  • xtreem
    xtreem Posts: 2,965
    [b]swampi101[/b] wrote:
    my rim is just over 1" wide, would that be ok or too small for a 2.4 tyre?
    Should be ok, but what are the rims, make and model?
    NS Bikes Eccentric Alu custom - 2016
  • swampi101
    swampi101 Posts: 210
    Not a clue what brand, they came with the bike (diamondback).

    These are the tyres I have decided to get http://www.chainreactioncycles.com/Models.aspx?ModelID=5849
  • xtreem
    xtreem Posts: 2,965
    Which Diamondback, model and year?

    EDIT: The 2.35 version mostlikely will fit but the 2.5 I doubt that.
    NS Bikes Eccentric Alu custom - 2016
  • swampi101
    swampi101 Posts: 210
    2006 Sorrento, Disc.
  • grumsta
    grumsta Posts: 994
    I run 2.5s on my 719s which are 24.5mm wide - they are only recommended to use up to 2.3s but I haven't found it a problem
  • xtreem
    xtreem Posts: 2,965
    You probably have Weinmann XTB-24 rims.
    So if the design of that rim haven't changed much then you have an internal width of 19.5mm.
    So that means you can run the Minion in the 2.35" version.

    Plus, a local guy has 2.35" Highrollers on a rim with 17mm of internal width
    and so far he has no problems.
    NS Bikes Eccentric Alu custom - 2016
  • RealMan
    RealMan Posts: 2,166
    I've run massive DH tyres and skinny slicks on almost all the rims I've ever owned, never paid any attention to rim width really. I think this whole "you need an 18mm rim not a 17mm rim for that tyre" is ridiculous.

    2.1 to 2.4 is a big jump though.
  • Northwind
    Northwind Posts: 14,675
    I've used "oversized" tyres myself and couldn't tell any difference between how they felt on the old rims and how they are on my new, wider ones. Remember, it'll also depend on the tyre- a 2.4 Mountain King's nothing like 2.4 inches across, Conti measure their tyres using pen*s inches.
    Uncompromising extremist
  • RealMan
    RealMan Posts: 2,166
    Northwind wrote:
    Remember, it'll also depend on the tyre- a 2.4 Mountain King's nothing like 2.4 inches across, Conti measure their tyres using pen*s inches.

    Agreed for the mountain kings, but for my rubber queens, they come to 2.217 inches. And that's as close as you can expect for a 2.2 tyre. As for their other tyres, I'm not sure, but they really did mess up on those mountain kings.
  • Northwind
    Northwind Posts: 14,675
    Ah, fair play, I've only used MKs but seen one of the other Kings- Race or Speed, probably Speed I think- does the same and assumed it'd be like that across the board. That's even more confusing :lol: Ridiculous really.
    Uncompromising extremist
  • .blitz
    .blitz Posts: 6,197
    swampi101 wrote:
    my rim is just over 1" wide, would that be ok or too small for a 2.4 tyre?

    I just measured my frame and forks, the max I could go on rear is 2.2, but fork will take 2.5.
    Pretty much the same as my Rize. I have a 2.4 Nic up front and a 2.25 on the back, and if anything the 2.25 looks too small. Go big up front (but not heavy) and ride over/through anything.
  • swampi101
    swampi101 Posts: 210
    BAH, typical, CRC just discontinued single ply minion 2.5 :evil:

    thanks for the help everyone :)

    EDIT: MY GOD! ive just looked at the dual ply minions, they do 2.7! hehe i better not get them though :P
  • swampi101
    swampi101 Posts: 210
    who uses Kenda Nevegals? I fancy trying the 2.5, how well do they grip in wet/dry?

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