Pads for Shimano CX50 Cantilever brakes

[Steveo2020]

Hi

Yes that is the ones. They fitted fine in place of the old pads, with all the original washers and spacers. No problems since.

Cheers

Steve

[Grumpyoldbiker]

Yes that is the ones. They fitted fine in place of the old pads, with all the original washers and spacers. No problems since.

Thanks Steve

Did these aztec pads give any adjustment for aligning the pad onto the rim or was that not an issue?

I forgot to mention earlier that the bike is a Dawes Galaxy.

Thanks

Peter

[delap]

Do you know which pads are the actual replacement for these brakes? There seem to be different packs of R50T2 pads with different length spacers, and while I know my spacers are approximately 18mm, I have no idea whether these are the short, medium or long ones?

Thinking laterally, you could just get the R50T2 pads without spacers and use the ones you already have

SJSC have a good picture but not the world's best pricing of course.

http://www.sjscycles.co.uk/shimano-tiagra-br-4600-caliper-brake-shoe-set-r50t2-8jy-9807-prod30205/

Comparing to these, below, it looks like they have the same shoulder profile (so would seat into the end of the spacer ok) but it doesn't look as though the adjustment range is as great. Probably good enough though and it allows you to use pad inserts with your chose price/characteristics/marketing woo

http://www.chainreactioncycles.com/shimano-br-5700-r55c3-105-brake-pads/rp-prod61805

[Brucey]

if you are going to do that you may as well get these R55C3 shoes



and then you will have holders that will accept any standard shimano road pattern pad insert.

The bolt and spacer on these shoes interchanges with the R50T2 ones so should fit your extant bolts and spacers just as well.

You can see the range of pad options from shimano here;

http://techdocs.shimano.com/media/techdocs/content/cycle/EV/service/EV-BR_SHOE-Road-1326N_v1_m56577569830698525.pdf

obviously other manufacturers make inserts that fit these shoes also.

BTW has anyone tried the R55C2 compound? It claims to last well in wet conditions.

cheers

[Grumpyoldbiker]

Thinking laterally, you could just get the R50T2 pads without spacers and use the ones you already have

Thanks Delap - yes you are right, I came to the same conclusion since making my previous post and asked SJS and they confirmed that provided the pads you buy are the R50T2 type, irrespective of the spacer/bolt length supplied, you can just re-use your existing bolt and spacer, provided they are still in good condition. (not sure you can get the pads without any bolts or spacers?)
Regards

Peter

[delap]

Just by way of closure, I bought a pair of RC55C3 BR-6700 Ultegra Cartridge Brake Blocks and I can confirm that they fitted just fine. Discard the bolt and washer that come with them and reuse the bolt, washer and spacer that come with your CX50 brake calipers. The linked colour are a fair match for the calipers.

[edit] I did originally include a link to the site where I bought them (for illustration) but weirdly the text string p r o b i k e k i t gets substituted with GetNastyComputerVirusHere when the post is previewed or submitted. The underlying text is preserved when the post is edited so I am not certain if it will always render that way.

Does the forum know something about them that I don't?

[Brucey]

cool.

BTW I also found these;



Fibrax 'Rhino' dual compound V type shoes.

Unlike all other similar shoes I have seen they (like the road shoes and the CX series shoes) also swivel for alignment at the holder.

[edit; now I know what I'm looking for a bit better, I think that there are Aztec and Ashima holders that also work the same way, i.e. with the swivel in the holder.]

I suspect that these could be adapted to work on a CX50 type brake, but it might take a little more faffing about; I think the hole in the shoe would have to be enlarged slightly to accept the M5 threaded female nut from the CX50 (etc) shoe. Also the nut may not fit the inside of the shoe perfectly either, but maybe it can be modified.

Still if it gets you so that you can use V inserts then it can't be all bad; I much prefer this type of pad in many respects.

If anyone has some worn CX50 shoes that I can salvage the M5 nuts from, let me know, and I'll try them for size in the fibrax holders.

cheers

[Brucey]

Does the forum know something about them that I don't?

yeah, as advertised more or less. Certainly at one time, dunno about now.

cheers

[gaz]

.

[delap]

thanks for the fill in on the censor list.

Brucey, I am moderately interested in the idea of 70mm v-type compatibility so I broke up an old R50T2 (the pad from the CX50) to see what the nut looked like. Have a look and see what you think https://plus.google.com/photos/117398976551333886217/albums/5978048386409177825.

I could send the nut to offer up to the fibrax pad although personally, now I have bought the ultegra pads, I wouldn't spend too much effort fettling the nuts if they didn't fit reasonably easily. Let me know how to get in touch if you are interested.

james

[CREPELLO]

cool.

BTW I also found these;



Fibrax 'Rhino' dual compound V type shoes.

Unlike all other similar shoes I have seen they (like the road shoes and the CX series shoes) also swivel for alignment at the holder.

Koolstop V cartridges do (or did) work in the same way. I found they tended to slip when toeing in the shoes, compared to the original design. This was probably because of the shiny finish of the holder. So perhaps a bit of roughing up would solve this.

[Brucey]

@ delap; thanks for the pics of the sleeve nuts etc. If those M5 sleeve nuts are like the (non swivelling) ones I have then they are about 6.2mm dia and they will fit in the Fibrax shoes, maybe even with no fettling required. The swivel angle may be reduced though because the hole in the fibrax holder is 7.0mm dia and normally has a plain shank less than 6mm dia going through it. I still think it should be enough unless the braze-on is badly cocked.

I think the curvature radius on the curvy washers may be different too, but maybe this can maybe be overcome by using one from an old V-block.

If want me to try them for size I can do; I'll pm you my address. If you have no use for your old sleeve nuts I think I can use them; I want to make a set of toe-adjustable post mount pads (for Mafacs etc) and I think these are just what I need.

For a CX50 conversion the other way of doing it would be to use an extra-long M6 stud in a V pad with revised spacers etc. Oddly enough making a longer M6 stud to fit the Fibrax shoes etc would be quite easy whereas making the M5 sleeve nuts is a bit trickier.

@ crepello; interesting that they might slip more easily. I am thinking that adding a thin wave washer to such assys would at least 'hold' the adjustment a bit better whilst it is tightened, even if it doesn't help hold it any better when the bolt is tight.


I see what you mean about the koolstops; that looks like a very shiny anodised finish on the holder.

cheers

[CREPELLO]

I see what you mean about the koolstops; that looks like a very shiny anodised finish on the holder.

cheers

Now, come to think of it, I recall the recessed spacers were also finished much more smoothly, as I think you can tell from the picture. It's obviously easy to fix if you are aware of what's going on, but at the time I didn't pursue this and eventually sold them on.

The original design spacers were made with a rough finish, by accident or intent.

[delap]

@Brucey You are welcome to the sleeve nuts, and I would be interested to know if they fit the fibrax shoes for another day. I have two dead R50T2s. The one from the album and a similarly worn one which I could slice up. You are welcome to the metal shoes from them too, if that is any help, as well as the retaining bolts and concave washers from the ultegra pads. Let me know if you want just the sleeve nuts or any of the other bits as well. I will have two more dead R50T2s in a few months.

best wishes
james

[jimneycricket]

Hi ,

I am having the same issue now as the Op so many years ago , so from looking through the above posts I think all I need is either those r55cr shoes or those Aztec shoes with my existing bolt and spacers and then I can use a wide range of brake pad inserts and wont have to shell out for the expensive CX50 specific brake? What about toe in and all that , can I make those kind of micro adjustments with the R55CR / Astec holders ? Thanks I know its been a while since this was current.