Got a set of 404 Firecrest CC's, and took them out for a spin today. Was surprised to hear the brake pads rub under sprints even with the brakes fully opened. Anybody else experienced this before?

Anything to do about it?

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I like Spanish bikes and cars. Riding an Orbea Orca and a Seat Ibiza.

You need to be quite careful about how tight the bearings are & the affect of pre-load / clamping with the QR.

You will get some play on the rear no matter how much adjusting you do - esp if you want the bearings to running freely - but there is no reason why you should not be able to adjust things so its either not actually there or just barely there on really hard efforts.

One point would be to carefully centre the brake - I have mine centred slightly off to provide more bias to one side (NDS I think).. which allows for the rear to move in which way it wants to & avoid rub.

My set up is with ultrashift ergo, ee brake mk.2 & extralite aliens2 fwiw... & the 1st version of the 404 FC (so not the wider hub design).

All of above is great advice. Also check the angle of your pads in the vertical plane. They need to be canted slightly when 'at rest' to met the rim squarely when applied. This looks a little odd to the eye. If you mount the pads parallel to the rim, they will rub when the wheel is rotating.

Can you elaborate on that a bit further? I'm not sure I quite understand how I should allign the pads

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I like Spanish bikes and cars. Riding an Orbea Orca and a Seat Ibiza.

Hmm, turns out it's probably not brake rubbing, but the wheel rubbing against the chainstay under acceleration. I wonder if anything can be done to this.

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I like Spanish bikes and cars. Riding an Orbea Orca and a Seat Ibiza.

Not all frames are compatible with Firecrest rims. What frame do you have?

A 2010 Orbea Orca. It fits ok and maybe have 2-3 mm of clearance on each side of the wheel. But under load the frame contacts the chainstays.

Wondering if it's possible to have a carbon specialist maybe take off some of the carbon and make a new layup, without compromising stiffness.

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I like Spanish bikes and cars. Riding an Orbea Orca and a Seat Ibiza.

I had this issue- drove me nuts, the front wheel was rubbing on the inner sides of the fork.

Turned out it was my skewers being inadequate in terms of clamping force- switched from the Planet-X ones to the Zipp Ti's and the rub vanished at once (404 Firecrests on a System Six).

I had the chainstay rub issue with a 2009 Orca and 2011 404 Firecrest tubulars. Last time I checked, Zipp has a short list of Firecrest / frame incompatibilities on their website but it seemed far from comprehensive (the Orca wasn't on there).