Anyone know anything about disc brakes?

Don't like the graphics on Zee... ;)

Is it recommended to fit flat mount callipers to an IS mount frame? I'm thinking of fitting TRP Sprye C callipers to a Genesis Croix de Fer and seen this mount, but unsure if okay.

That'll put a post mount caliper on an IS mount frame. Flat mount is quite different.

I've just upgraded a front Spyre to a HY/RD. Now, there's a lot more fork judder while braking than there was before - typically at quite low speeds, like pulling up to a light.

I've done what I think is the obvious stuff (wait a bit for the pads to bed in, tighten up the headset, check disc straightness).

What might I be missing? Is there a magic incantation? The HY/RDs do have more stopping power, but it's not like they should be shaking the bike apart.

I read somewhere that this can happen when theres no grease between the pad and piston

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@M_V Thanks for clarifying

@amey that's almost it, but does this exist but mounting to an IS style bike?

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you need IS to PM, thats flat mount to PM.

I think he needs IS to flat mount, if there is such a thing.

wait @jambon you have flat mount calipers that you are looking to put on IS/PM? Thats not possible.

Yes that's it, I would be fitting a flat mount caliper to an IS frame. Glad I checked if such a thing exists. Cheers

I've given them a rub with a stick of butter, but now there's just the delicious smell of toast when I brake.

What might I be missing? Is there a magic incantation? The HY/RDs do have more stopping power, but it's not like they should be shaking the bike apart.

Clean the rotor, take out pads, clean with alcohol, then sand it down a bit.

Once you done that, put it back together, and bed it in again.

Is the caliper aligned with the rotor

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Pads and rotor, then clean them again.

@jambon
is this what you need?

https://www.evanscycles.com/shimano-flat-mount-to-post-mount-capilier-adaptor-EV253016

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Off to the rubbing alcohol I go. Thanks.

I did the "pull the brake while tightening the mount bolts" thing, but it won't hurt to do it again. Thanks.

When bedding in, go really fast then brake hard without quite stopping, one brake at a time so that it's all done evenly, do it at least 20 times per brake, it'll definitely warm you up a bit.

I've just had a new CdF built by my LBS with flat mount discs

I'll check what mounts they used but it sounds like you're on the right track

Fitted a pair of Juin Tech R1 semi-hydro to my SS... very nice, even with spongy compressive outer cable. Main point over the HyRD is that I can adjust the lever throw, main drawback is that they are a closed system with no reservoir, so they don't self adjust... the adjusting dial is exceedingly easy to use though. Here with a pair of Veloce shifters where the innners have been removed to make the lightest brake levers on the market

main drawback is that they are a closed system with no reservoir, so they don't self adjust...

I actually think that's an advantage, I get too many customer who think their brakes is fine but the pads are almost completely worn out due to self adjusted for wear.

Possibly. This is my commuting bike, so not an issue... if it was a CX bike for racing, I wouldn't want to have to get off and adjust the pads in a race.
On balance the ability to adjust the lever throw is more of a feature than self adjusting will ever be.
However, metal piston and no reservoir means I would not use them to descend Monte Zoncolan, whereas I have come down some pretty vicious descents with the HyRD

lightest brake levers on the market

Don't tell the EC1 collective