Braking surface on a Corima Aero rim???

Gavin Gilbert
Gavin Gilbert Posts: 4,019
edited February 2009 in Workshop
I have spent a happy evening building up my TT bike; I am running a Corima Aero deep section Aero front wheel, with a Tektro behind-the-fork brake.

I'm surprised at how deep a drop the brake has - to the point where at the highest adjustment point I'm only able to get out 3mm of the brake pad to contact the 'natural' braking surface of the rim.

There's no way I could use shallow section rims with this brake, and due to the design I doubt a reversed drop-bolt would work.

Whilst the rim has an obvious braking surface, would it be safe to run the wheel with the brake pad bitting the V section of the rim? The material is the same, but would it have the structural rigidiity to take the braking force?

Comments

  • Frank the tank
    Frank the tank Posts: 6,553
    Only a guess but I would say probably not. The carbon fibres will have been layed up in a different way to the ones within the braking section of the wheel I would think and you may welll end up breaking the aero section, not to mention some bones if that were to happen.
    Tail end Charlie

    The above post may contain traces of sarcasm or/and bullsh*t.
  • Monty Dog
    Monty Dog Posts: 20,614
    I wouldn't run a brake beyond the proper brake track - many carbon rims have structural foam in the brake track region but not within the aero-section which is often hollow - putting pressure beyond the brake track would probably lead to premature structural failure - the aero section is often thinner too.
    Make mine an Italian, with Campagnolo on the side..
  • Kléber
    Kléber Posts: 6,842
    Are you sure you have the right brakes, some come with short drop and others have long drop versions, I think it's 47mm and 59mm drop or something like that.
  • Gavin Gilbert
    Gavin Gilbert Posts: 4,019
    Kléber wrote:
    Are you sure you have the right brakes, some come with short drop and others have long drop versions, I think it's 47mm and 59mm drop or something like that.

    Having done a bit more checking, they are the same as the Oval behind-the-fork brakes (Tektro being the OEM) and are listed on the Oval website with a deep drop. So it looks like I've had it. I agree with the advice not to run them on the V section of the rim.

    Buggerit....they look great and I wanted to get the bike on the road this weekend.

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