Advertisement
If you have a new account but are having problems posting or verifying your account, please email us on hello@boards.ie for help. Thanks :)
Hello all! Please ensure that you are posting a new thread or question in the appropriate forum. The Feedback forum is overwhelmed with questions that are having to be moved elsewhere. If you need help to verify your account contact hello@boards.ie
Hi there,
There is an issue with role permissions that is being worked on at the moment.
If you are having trouble with access or permissions on regional forums please post here to get access: https://www.boards.ie/discussion/2058365403/you-do-not-have-permission-for-that#latest

Anyone know what the biggest size tyre can be fitted with tiagra calipers?

  • 17-10-2011 12:47pm
    #1
    thehamo
    Registered Users, Registered Users 2 Posts: 2,049 ✭✭✭


    As above.

    I'l be doing adventure races next year and part of the cycle in some is on fire roads with gravel etc, but most is on tarmac road. Ideally i'd use my road bike, but id like to try fit a bigger tyre on, possiibly semi nobbly too. Any ideas?


Comments

  • #2
    cdaly_
    Registered Users, Registered Users 2 Posts: 6,440 ✭✭✭cdaly_


    I suspect your issue will be with frame clearance rather than caliper. My Giant FCR will take max 28mm but there's loads of clearance in the caliper.


  • #3
    thehamo
    Registered Users, Registered Users 2 Posts: 2,049 ✭✭✭thehamo


    Just looking at the frame there, I have 23c tyres on at the moment and with that theres about 1cm give above the wheel and either side of the tyre walls and the forks. Rouughly the same on the back wheel. Suppose my only option is to try it out


  • #4
    ray o
    Registered Users, Registered Users 2 Posts: 708 ✭✭✭ray o


    cdaly_ wrote: »
    I suspect your issue will be with frame clearance rather than caliper. My Giant FCR will take max 28mm but there's loads of clearance in the caliper.

    Can you get a set of guards on also?


  • #5
    cdaly_
    Registered Users, Registered Users 2 Posts: 6,440 ✭✭✭cdaly_


    I had a set of guards on with 25mm tyres but they wouldn't fit with 28mm. I'm now back on 25mm tyres and using a set of Race Blade guards which fit but don't protect the calipers from crap. These would work with 28mm tyres. I must try a set of Cruds next time...


  • #6
    thehamo
    Registered Users, Registered Users 2 Posts: 2,049 ✭✭✭thehamo


    just threw on a 28mm tyre that I had there and there is still a bit of lee way im wondering if I could possibly get on a 30.....


  • Advertisement
  • #7
    Lumen
    Registered Users, Registered Users 2 Posts: 31,222 ✭✭✭✭Lumen


    thehamo wrote: »
    just threw on a 28mm tyre that I had there and there is still a bit of lee way im wondering if I could possibly get on a 30.....

    Who knows? Mfrs lie about widths.

    Conti 4000S in 23mm are actually 24mm wide.

    The 28s I've used have measured about 26.5mm wide.

    Apparently Randonneur Pro 35mm are actually 32mm.

    Which means 23->35mm requires only 4mm more lateral clearance, rather than 6mm as you'd think from the specs.


  • #8
    cdaly_
    Registered Users, Registered Users 2 Posts: 6,440 ✭✭✭cdaly_


    I just happen to have a 35mm Schwalbe spiked winter tyre mounted on an Aksium wheel here* at the mo if you want to drop by and see how it fits...


    *Glasnevin


  • #9
    thehamo
    Registered Users, Registered Users 2 Posts: 2,049 ✭✭✭thehamo


    cdaly_ wrote: »
    I just happen to have a 35mm Schwalbe spiked winter tyre mounted on an Aksium wheel here* at the mo if you want to drop by and see how it fits...


    *Glasnevin


    Yeah that would be great thanks.
    Not sure when I can make it up il pm you now.


Advertisement