5800 calipers... ferrules?

ugo.santalucia

It seems the 5800 brakes don't take ferrules, meaning the ferrule does not enter the adjusting nut like it used to. I have therefore used one of those ferrules with a smaller section, with the wider part sitting on the adjusting nut (inner groove?) and the smaller section entering the nut... is this right or will I die?

ugo.santalucia

OK< did a bit of reading, apprently the ferrule is built in... need to remove the current one or die :-)

buckmulligan

Interesting, I've had the opposite experience.

I could never get any cable ferrules to fit my old 5700 calipers and had to run the bare brake cable housing into the adjuster nut thingie. Must've recabled it a good few times over the years, never found one that fit and didn't really like the bare cable solution but thought that was just the way they had to be.

However, I recently upgraded to 5800, fitted with a Jagwire cable kit and the ferrules fit like a glove!

As a side note, the 5800 calipers actually weigh a good few grams more than the old ones. I weighed them all side-by-side and both the new front and back calipers are heavier than their 5700 counterparts. No doubt when they release the next generation, Shimano will trumpet how they've managed to shave xyz grams from the previous version and neglect to mention that it's because these ones are overly heavy.

SME

I couldn't fit ferruls either when I put my 5800 calipers on last year, so just left them off. I cut my outer cables to length with a Dremel tool using a cut-off disc, so I keep the ends as smooth as possible.

I don't know what the cable adjusters are made of, but they don't have the usual lock nut I have been used too - instead there's some form of 'fixture' that somehow locks in place, and my brakes have always stayed well adjusted.

The SLR-EV caliper is quite powerful, and you'll notice the difference above standard calipers. I'm just about to try some SwissStop BXP's which, I'm informed, are a good pad.

Hope all this helps, and I'm not teaching you to 'suck eggs'.
Steve

ugo.santalucia

I have Jagwire ferrules and don't fit... other ferrules don't fit either... did a bit of reading on the web, checked the manual and there appears to be no need for ferrules... since... well 2010 apparently. Interesting, as I have been away from rim calipers since about the same time :-)

The 5800 might be heavier, but they are the dogs, they feel like a very well engineered caliper... there's new tricks in the old dogs, apparently

svetty

For their price the 5800s are indeed the dogs. Almost worth going round any older rim braked bikes in the stable and retro-fitting them all

buckmulligan

Here you go Ugo, photographic proof that you can get ferrules that fit the 5800 calipers:



These came with a Jagwire Road Pro Cable Kit, they're labelled POP (stands for Point of Power IIRC from the instruction leaflet) and they fit the adjuster nut of the 5800 calipers perfectly.

As I mentioned above, I could never find any to fit the 5700 calipers; I didn't like running the bare outer straight in there, eventually the plastic coating on it split just above the point of entry, although admittedly that could have been a indication of the outer being slightly too short. Either way, I'm happier running it with a ferrule.

ugo.santalucia

BuckMulligan wrote:

Here you go Ugo, photographic proof that you can get ferrules that fit the 5800 calipers:



These came with a Jagwire Road Pro Cable Kit, they're labelled POP (stands for Point of Power IIRC from the instruction leaflet) and they fit the adjuster nut of the 5800 calipers perfectly.

As I mentioned above, I could never find any to fit the 5700 calipers; I didn't like running the bare outer straight in there, eventually the plastic coating on it split just above the point of entry, although admittedly that could have been a indication of the outer being slightly too short. Either way, I'm happier running it with a ferrule.

Are these the ones that have a smaller section at the end that enters the nut (although not a snug fit) and a wider section at the top for the cable? If so, are they safe? It's a plastic thing and if the bottom part is not filled with the cable outer, it could be crushed...

Or maybe not... basically this is the ferrule I had fitted originally in my first post... should I pop the POP back on then?

buckmulligan

Having just had a quick Google, it seems as though the POP ferrules are designed to reduce the diameter from the 5mm of a standard ferrule, to 4mm for wider caliper and frame-stop compatibility. They look like this:



Apparently they're made of alloy and I believe (hope!) that the bottom 4mm section is solid, so the outer stops at the end of the fat bit. Either way, I installed them at the calipers as per the Jagwire instructions and video; after installing it I did the usual "jam the brakes on as hard as you can" to make sure everything was fully-seated and then readjusted the cable tension and it's been great ever since. The small section has a tiny bit of play in the 5800 caliper adjuster nut, but I think that is by design so that you can turn the nut freely without twisting the cable; the fat outer bit of these doesn't sit on anything either, so perhaps the ones that you have are slightly different dimensions?

That Jagwire kit feels a thousand times better than the bog-standard cables I was using before; I can only assume that's mostly due to the POP ferrules

ugo.santalucia

Yep, these are the ones I got... re-fitted it at the front where the cable is compressionless... the rear is not, so no need for a ferrule