Join Date: Mar 2008
Location: The 'Wack, BC, Canada
Bikes: Norco (2), Miyata, Canondale, Soma, Redline
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I'd suggest "neither".
First off you need to measure from the caliper mounting bolt down to the middle of the braking surface. If that measurement exceeds the 49mm reach of the caliper you found then you can't use that caliper. You need to find a caliper with a longer reach instead that will fit. And at 49mm for the Sora you found it implies that it is intended to fit onto the newer tight fitting frames and forks of the present generation of road bikes where the frames fit closely to the wheels. Vintage road bikes generally had a lot more room around the wheels and tires and called for a longer reach of caliper. But if it turns out that your frame and wheels are within the 49mm reach of the Sora caliper then yes, it would be worth buying.
As for cables I would not buy a set or separates unless it has the phrase or words "slick", *Slic" or "smooth drawn" or something similar to indicate that the cables were drawn or ground down to produce a nice smooth outer surface. The difference over a smooth drawn cable has over a regular cable has to be felt to be believed. It is well worth emailing them or phoneing them and asking which sets or individual cables actually have such a surface on them. If none do then shop elsewhere. It's worth it. It may be that you are better off shopping from your local bike shop in this case. You can run a finger over the cable and know instantly if they are smooth drawn or ground finish or not. It's that noticable.
And because things happen to cables it's worth buying them separate so you can get a spare or two and then buy the housing and end ferrules separate as well. Most local shops sell it off a bulk roll by the foot or meter. You'll want to measure all the segments on your bike presently and add them up to find out how much you need and how many ferrules to get.
And of course you need a way to cut and dress the ends of the housings. For a lot of us this means using a set of big side cutters and a file to dress down the crushing and square up the end. Making up a V block from wood or a bit of angle iron and clamping it to the bench so that you can hold the housing in the V so it just sticks up a little and file it works well. Or if you have a grinder you can dress the ends with a light touch on the wheel followed by an awl or scriber to open up the melted inner plastic tube from the heat.
So all in all I'd say you need to do just a little more homework on your bike by measuring some things and then go shopping again.
If you need longer reach calipers as I suspect you will Tektro makes a whole line of them. And they are very nicely made to boot.
There's two different styles of cable ends that fit road bike levers or mountain bike levers. "Cantilever" brakes are a mountain bike style for the most part although they show up on cyclocross bikes as well these days. But that means when it says "SLR Cantilever brakes" it implies that the ends are the ones to fit into mountain bike levers.
If you want to see pictures and read more about the job you're wanting to do look at the brake section at www.parktool.com/repair