Record-12 brake clearance update

[Waldo62]

The problem isn't with the brakes, but with the frame...

[robt57]

Originally Posted by Waldo62

The problem isn't with the brakes, but with the frame...

Maybe not...

Not the case when I upgraded My Ti Super Spectrum from 7800 to 11 SR. I had to go down a tire size with the SR calipers the 7800 had room for.

And been in that situation before with Ti Record calipers. I learned then the rim brake calipers with the most room are BR-5800. Ti Record Calipers going on a my Look 585.

[Black Dog]

Originally Posted by Waldo62

The problem isn't with the brakes, but with the frame...

Exactly. When the world only ran 23mm tires brake bridges started getting lower and chain stays got closer together near the BB.

[Dave]

Originally Posted by fignon's barber

Just curious: are 11speed brakes compatible with a 12speed group, or has campagnolo engineered in some sort of modulation hurdle?

I have 2018 Chorus 11 brakes on one of my 12 speed bikes. The other has Chorus 12 brakes with the Shimano standard pads. I haven't noticed any difference.

[fignon's barber]

Originally Posted by Dave

I have 2018 Chorus 11 brakes on one of my 12 speed bikes. The other has Chorus 12 brakes with the Shimano standard pads. I haven't noticed any difference.

Thanks Dave.

[clarendon]

Originally Posted by KarlC

Lots of extra clearance with Record 12 if you want it, by adjusting the screw on the side.....

Hi - I know this group attracts a fair number of Peg users. Has anyone managed to fit Corsa 28s on a Marcelo with SR/R 12 speed? I can fit Corsa 25s fine on Bora rims with not a huge amount of extra clearance but interested to give 28s a try. I haven't tried adjusting the screw yet though

[lavi]

Originally Posted by clarendon

Hi - I know this group attracts a fair number of Peg users. Has anyone managed to fit Corsa 28s on a Marcelo with SR/R 12 speed? I can fit Corsa 25s fine on Bora rims with not a huge amount of extra clearance but interested to give 28s a try. I haven't tried adjusting the screw yet though

I don't think a 28 would fit (on a wider rim)...not because of the brake bridge/caliper. That might work. Up front (the Falz fork, or Ouzo) won't clear more than a 25. Back to the rear....it's the clearance on the seat stays that will likely not work with a 28.

On my Love #3, a 25 on a wide rim (HED and Enve) would leave a scant 2 mm or so between the stay and the rubber. Not much wiggle room there.

[clarendon]

Originally Posted by lavi

I don't think a 28 would fit (on a wider rim)...not because of the brake bridge/caliper. That might work. Up front (the Falz fork, or Ouzo) won't clear more than a 25. Back to the rear....it's the clearance on the seat stays that will likely not work with a 28.

On my Love #3, a 25 on a wide rim (HED and Enve) would leave a scant 2 mm or so between the stay and the rubber. Not much wiggle room there.

Returning to this with an update and a question. This is my 2008 era Marcelo with a Veloflex Corsa 28 on the rear, SR 12 and a Bora 35 rim. There is some clearance (perhaps 2-3mm) after taking up some slack in the cable but not much - also the bridge is pretty close. To the point @lavi raised there actually does seem to be good clearance up front with the Falz 2 on this bike as well as at the back on the seat stays.

My question is whether there is anything else I can do to the callipers to increase the clearance a little? I think @huck*this mentioned the adjuster in a previous post. Or should I just ride 25s?

[AngryScientist]

Originally Posted by clarendon

Returning to this with an update and a question. This is my 2008 era Marcelo with a Veloflex Corsa 28 on the rear, SR 12 and a Bora 35 rim. There is some clearance (perhaps 2-3mm) after taking up some slack in the cable but not much - also the bridge is pretty close. To the point @lavi raised there actually does seem to be good clearance up front with the Falz 2 on this bike as well as at the back on the seat stays.

My question is whether there is anything else I can do to the callipers to increase the clearance a little? I think @huck_this mentioned the adjuster in a previous post. Or should I just ride 25s?

have you viewed post 23 in this thread from Karl? the adjuster screw does change the geometry of these brakes quite a bit depending on bridge location, something to play around with if you havent already for sure.

[clarendon]

Originally Posted by AngryScientist

have you viewed post 23 in this thread from Karl? the adjuster screw does change the geometry of these brakes quite a bit depending on bridge location, something to play around with if you havent already for sure.

Cheers. When you say adjuster are you referring to the large black dial screw on the side?

[thirdgenbird]

An extra washer between the brake and frame could gain you space too. I’ve done this in other applications.

[AngryScientist]

Originally Posted by clarendon

Cheers. When you say adjuster are you referring to the large black dial screw on the side?

no. in the photo below you see a tiny set screw to the extreme right of the photo (just below the pivot point). that's the one to play with. it's surprising how much it changes the brake geometry. give it a try.

[clarendon]

[QUOTE=AngryScientist;2800663]no. in the photo below you see a tiny set screw to the extreme right of the photo (just below the pivot point). that's the one to play with. it's surprising how much it changes the brake geometry. give it a try.


Got it. That definitely helps. I can get 3mm of clearance that way between tyre and calliper. Any views on whether that's enough (or go back to 25s)?

Also - what does the screw on the other side do..

[AngryScientist]

Originally Posted by clarendon

Got it. That definitely helps. I can get 3mm of clearance that way between tyre and calliper. Any views on whether that's enough (or go back to 25s)?

if this sees dry roads mainly, that's enough. if you're frequently riding wet gritty stuff, you'll put some wear on the brake, but it's not a big deal IMO, i'd ride it that way.

[thirdgenbird]

I agree with above. While I prefer more, 3mm is enough for road riding. Don’t be shocked if you wear the anodization a bit but it’s not an issue.