I'm happy to bodge most things but not brakes. I'd guess my discs are too soft and get eaten through by sintered pads.
CityCyclingEdinburgh Forum » Stuff
MULTI-COLOURED (not just yellow) SWAPSHOP
(903 posts)-
Posted 3 years ago #
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Shimano advises caution, but doesn't explain why:
https://bike.shimano.com/en-EU/product/component/shimano/BR-MT410.html
That is to say, the SM-RT30, SM-RT54 and SM-RT56 rotors are only rated for resin pad. The difference between these and higher end rotors (M6000, Saint, SLX, etc.) is the size and pattern of the holes. Recall that holes aren't so much for cooling as for gas escape, to disrupt water, and for surface scouring.
Resin/organic pads are designed to be easier to deal with and less demanding to use, and because they don't conduct heat very well they put the heat from braking into the rotor. Sintered/metal handles heat better, and so allows more of the energy to be transferred into the caliper. The trade off on a super long descent is that a resin pad might destroy itself, but mineral oil could overheat.
In practice, a new sintered pad will take longer to bed in, and may well squeal more. Buyers of a low end brake (Tourney, Altus and the like) may not understand the nuance of the technology, hence the use of resin pads.
I would say that you can use sintered pads on a disc that has more metal in it, but maybe not all resin pads will work as reliably or as durably on a skinny disc designed for sintered use (after all, Shimano is selling XTR for racing and extreme use, rather than riding to the shops – though daily screaming down Dundas Street might call for better brakes!).
Posted 3 years ago # -
People like me don’t even understand this...
“may not understand the nuance of the technology, hence the use of resin pads“
Posted 3 years ago # -
Had a small panic there and ran off to check what rotors I had rt66 apparently don't have this warning.
Posted 3 years ago # -
More brake goodness ... apparently the bed in process with sintered pads also involves a layer of pad material being put onto the rotor, so easy does it to ensure the distribution is uniform. This gives better braking because there is an adhesion effect as well as abrasion. Also why rotors can be contaminated, it's actually the pad material layer that has been affected.
I read this somewhere.
Posted 3 years ago # -
DM-med you. Still looking for ways to fit things in my shed but will defer to anyone with an actual tenement flat.
Posted 3 years ago # -
Had a quick look up in the loft and found a thing for sale: Nitto M12 front mini-rack. Unused and in perfect condition, fitted only once for just long enough to establish that it sat right in the way of my brake noodle. Won't fit on my other bike as there's no fork crown hole. £30, as VGC and at least twice that in shops? Ideal winterfeast gift?
Hudora Joey balance bike from upthread also still available.
Posted 3 years ago # -
Anyone got a pair of bolt cutters I could borrow?
Posted 3 years ago # -
That doesn't sound good.
Posted 3 years ago # -
Yep, bought myself a pair of comically large cutters for a job that didn't happen...
Robert
Posted 3 years ago # -
@Roibeard
Oh, exceptional. Could I borrow them at the weekend?
@Cyclingmollie
Worry not! I just need to chop a rather rugged object up in order to effect a repair on a bit of garden furniture.
Posted 3 years ago # -
Comically large bolt cutters deployed and repair effected. Perfect tool for the job in fact. Loan reimbursed with grass seed.
CCE is very often a thing of joy.
Posted 3 years ago # -
I've a very basic flange mounted bicycle carrier surplus to requirements.
It mounts on the classic towball mount (square, four bolt thingy) before you attach the towball, permitting the carriage of two bikes whilst retaining the ability to tow.
In use, two metal poles are inserted, which terminate in a simple Y which holds the crossbar (diamond frame only!). An adapter is included which allows a second bike to piggyback, as well as the necessary longer bolts for the towball.
Bikes are "secured" using bungies - none of your fancy Thule clamps here!
Photos would have made this clearer...
(edit - like this, but even more basic!)
Anyone want this obscure scrap metal?
Robert
Posted 3 years ago # -
Kids MTB shoes for cleats (cleats not included) size 33/UK 1
Dm me for pictures.
Posted 3 years ago # -
Anybody looking to offload a pair of speedy low-profile 700C road tyres or a pair of Octalink V1 crank bolts?
Posted 3 years ago # -
Schwalbe Kojaks do you? Never used, smoke and pet free home etc. and I doubt I'll ever get round to using them for what I was going to use them.
Posted 3 years ago # -
That would be perfect thanks. Would need to give you something for them as they are for my pal's boy.
Posted 3 years ago # -
I'll look up what I paid for them...
Hmm. PlanetX don't seem to itemise email receipts so call it a tenner.Posted 3 years ago # -
Done.
Posted 3 years ago # -
On the off-chance before I scour Gumtree does anyone have a Black and Decker Workmate they're looking to offload?
Posted 3 years ago # -
Quite horrible things.
But quite useful too, so I’ll be keeping mine.
I’m sure there will be someone who got one ‘because’ and may have abandoned using it.
Posted 3 years ago # -
No, but I think I still have a spare set of the plastic chock things which peg into the holes at the top of a Workmate after our former former neighbour left them when he switched to landlord mode.
Posted 3 years ago # -
Quite horrible things. But quite useful too.
That's exactly why I don't have one.
Posted 3 years ago # -
Which aspect of it are you needing? The ability to stand on something firmly clamped to something you're sawing through? The half-rubbed-off protractor markings? Given the ease with which hinged metal legs become maladapted to not wobbling I'd not get a Workmate again in favour of a heavy table with a couple of vices firmly bolted thereto.
Posted 3 years ago # -
The clamping and particularly the orange peg thing arrangement but also foldability important. I've used my mother-out-law's ancient one a lot and have figured ways to keep it straight. I'd just pinch that off her if it wasn't a thousand miles away. Should have done the last time I had the chance, emptied the wine cellar instead.
Posted 3 years ago # -
“emptied the wine cellar instead“
Need to get your priorities sorted...
Posted 3 years ago # -
It was all a bit foosty and I wound up cooking with most of it. Couple of the reds might have survived.
Posted 3 years ago # -
Posted 3 years ago #
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