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Boardman Team HT

Last weekend I broke the rear brake lever in a crash. I'm looking for a replacement brake disc kit for the rear brake, but I don't know what kind of mounting I've got. There seem to be two types, post-mount and IS (International Standard).

The shop I bought my bike from didn't have a manual when I bought it, I can't find one on-line, and the boardman website doesn't seem to have it or any contact info.

Which system does it have?

I'm pretty sure it's post-mount on the front as I've found a manual for the front fork.

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When I bought my Avid BB7s, they included an adapter, which allowed them to be mounted on either post or IS. So it may not matter. –  Mike Baranczak Jun 8 '11 at 17:33
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2 Answers 2

You should be able to look at the bike and take a look:

International standard vs post mount

It should be pretty straightforward to identify how the brake caliper is bolted to the frame.

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So post mounts screw directly in, and the IS ones bolt through. Do the mountings look identical for the back brakes as they do for the pictured front ones? –  Scott Langham Jun 8 '11 at 7:45
    
For rear disks, I've only ever seen one type of mount. It looks like the IS - the screws go in from the side. –  Mike Baranczak Jun 8 '11 at 17:28
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The Salsa Big Mama has rear post mounts, for example: salsacycles.com/files/bikes/bikes_bigmama7.jpg –  lantius Jun 9 '11 at 7:04
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The stock brakes are Avid Elixir 3. These are available in post and ISO mounts, but according to wikipedia post mounts are mostly used on the front brakes, with ISO mounts on the rear. This suggests to me that the kit likely has one of each - a post mount brake for the front and an ISO brake for the rear. Photos of the non-drive side are hard to find, but this ebay one seems to show an ISO mount.

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