http://citycyclingedinburgh.info/bbpress/ CityCyclingEdinburgh Forum » Topic: Disc Brakes on a Racer en Sun, 31 May 2026 14:41:59 +0000 http://citycyclingedinburgh.info/bbpress/topic.php?id=3403&page=3#post-36046 Sat, 23 Jul 2011 07:58:24 +0000 gembo 36046@http://citycyclingedinburgh.info/bbpress/ <p>these are very convincing arguments, eventually all will be disc I am sure. I wish sometimes I stuck to vinyl but progress can be good. </p> http://citycyclingedinburgh.info/bbpress/topic.php?id=3403&page=3#post-35969 Fri, 22 Jul 2011 08:05:17 +0000 Dave 35969@http://citycyclingedinburgh.info/bbpress/ <p>I had to adjust the wife's front disc brake this morning as she complained it was a little loose (so much for the all-day bike maintenance course she went on ;-)</p> <p>Half a turn of an allen key and a twist of the barrel adjuster and it was running sweetly again - this is the first time they've been touched since it rolled out of the shop. (I took the opportunity to inspect the pad wear and was surprised that they still look like new.)</p> <p>The bike is now a year old and a commuter (although it wasn't ridden through the manky weather over winter). Not bad really - I used to have to wrangle the calipers on her old bike on a regular basis to keep them centred and allow for wear. </p> http://citycyclingedinburgh.info/bbpress/topic.php?id=3403&page=3#post-35958 Thu, 21 Jul 2011 20:25:47 +0000 gembo 35958@http://citycyclingedinburgh.info/bbpress/ <p>Saw guy yesterday with disc brakes on front of single speed. To me (I am biased) that shows that</p> <p>one trendy thing plus another trendy thing does not equal a trendy thing </p> http://citycyclingedinburgh.info/bbpress/topic.php?id=3403&page=3#post-35925 Thu, 21 Jul 2011 10:24:34 +0000 DaveC 35925@http://citycyclingedinburgh.info/bbpress/ <p><a href="http://www.cotic.co.uk/product/roadrat" rel="nofollow">http://www.cotic.co.uk/product/roadrat</a> </p> <p>Oh I like the X as it has drop handle bars and I can put mudguards and slick tyres on....</p> <p>Just have to work my other half.... </p> http://citycyclingedinburgh.info/bbpress/topic.php?id=3403&page=3#post-35887 Wed, 20 Jul 2011 16:56:09 +0000 Dave 35887@http://citycyclingedinburgh.info/bbpress/ <p>I was looking at a roadrat for SWMBO before we settled on the Croix de Fer. Very nice... </p> http://citycyclingedinburgh.info/bbpress/topic.php?id=3403&page=3#post-35880 Wed, 20 Jul 2011 16:20:52 +0000 Wilmington's Cow 35880@http://citycyclingedinburgh.info/bbpress/ <p>Actually, The Bike Chain have just started stocking Cotic stuff - not sure if it's only the MTB frames, or if they're doing the road frames as well. </p> http://citycyclingedinburgh.info/bbpress/topic.php?id=3403&page=2#post-35879 Wed, 20 Jul 2011 16:18:57 +0000 amir 35879@http://citycyclingedinburgh.info/bbpress/ <p>Dave C - I am pretty sure that I have seen some off-the-shelf road bikes with drops and disc brakes.</p> <p>Also if you did go custom think you can get disc mounts on a road rat. A local shop would be able to do a custom build for you.</p> <p><a href="http://www.cotic.co.uk/product/roadrat" rel="nofollow">http://www.cotic.co.uk/product/roadrat</a> </p> http://citycyclingedinburgh.info/bbpress/topic.php?id=3403&page=2#post-35872 Wed, 20 Jul 2011 14:33:17 +0000 Wilmington's Cow 35872@http://citycyclingedinburgh.info/bbpress/ <p>It's one of the two options on the Kaffenback fork. Non-disc is in stock just now, waiting for new stock of the disc option: <a href="http://www.planet-x-bikes.co.uk/i/q/FOPXK/planet-x-kaffenback-fork" rel="nofollow">http://www.planet-x-bikes.co.uk/i/q/FOPXK/planet-x-kaffenback-fork</a> </p> http://citycyclingedinburgh.info/bbpress/topic.php?id=3403&page=2#post-35871 Wed, 20 Jul 2011 14:18:49 +0000 DaveC 35871@http://citycyclingedinburgh.info/bbpress/ <p>Anth, yes but the Bad Boy is a hybrid, I prefer a tourer/road bike.</p> <p>I can't see the forks <a href="http://www.planet-x-bikes.co.uk/c/q/forks">here</a><br /> Can you provide a link pls? </p> http://citycyclingedinburgh.info/bbpress/topic.php?id=3403&page=2#post-35856 Wed, 20 Jul 2011 11:37:42 +0000 Wilmington's Cow 35856@http://citycyclingedinburgh.info/bbpress/ <p>Hey Dave, I've not got the disc on the front of the Kaff yet - Planet-X don't have the fork in stock at the moment. I'm not sure if/when Planet-X will have their disc specific Kaffenback for sale, but given they sell the disc fork it can't be long off.</p> <p>For discs on a commuter do bikes like the Cannondale Bad Boy not run discs? </p> http://citycyclingedinburgh.info/bbpress/topic.php?id=3403&page=2#post-35854 Wed, 20 Jul 2011 11:12:02 +0000 DaveC 35854@http://citycyclingedinburgh.info/bbpress/ <p>Hi Anth,<br /> Can you post some pics please of your kaffenback. I've googles them but can't find any good info. Is this a custom build for you or something commercially available? I'd like disc brakes on a commuter bike but can't find any for sale which are not a custom job.<br /> Cheers,<br /> Dave C </p> http://citycyclingedinburgh.info/bbpress/topic.php?id=3403&page=2#post-35845 Wed, 20 Jul 2011 09:40:25 +0000 Smudge 35845@http://citycyclingedinburgh.info/bbpress/ <p>or if you want to be properly bling and individual, get a second set of disc mounts on the fork and fit twin discs. Then you can leave the normal brake on the back "because it's just to drift on for stability, there's no braking effect when it's hovering over the tarmac" ;-) </p> http://citycyclingedinburgh.info/bbpress/topic.php?id=3403&page=2#post-35844 Wed, 20 Jul 2011 09:29:38 +0000 Wilmington's Cow 35844@http://citycyclingedinburgh.info/bbpress/ <p>Ah, but my Kaffenback frame has canti bosses. But it's an expensive option for the benefit, the bike will look lopsided with a disc on the front only, but it'll stop me plenty well enough. </p> http://citycyclingedinburgh.info/bbpress/topic.php?id=3403&page=2#post-35842 Wed, 20 Jul 2011 09:25:56 +0000 Dave 35842@http://citycyclingedinburgh.info/bbpress/ <p>MTB hubs are 135mm whether they're disc or not - only road frames take 130mm (and track 120mm). Since the solution only works if there's a mountain-bike style V-brake boss on the stay, I'm guessing they're aimed at that market? </p> http://citycyclingedinburgh.info/bbpress/topic.php?id=3403&page=2#post-35832 Tue, 19 Jul 2011 23:30:18 +0000 druidh 35832@http://citycyclingedinburgh.info/bbpress/ <p>The disk attaches to the hub, so you'd definitely need a new hub. That could be laced into your existing rim, although it would likely need new spokes too. A new wheel would be the easiest option. </p> <p>However, I'd be very surprised if it was even that simple as disk hubs are 135mm and non-disk usually 130mm wide. That means "springing" the rear of the bike apart to get the greater width (in fact, my Amazon is built for a 132.5mm hub so it can take either width with a bit of gentle persuasion) </p> http://citycyclingedinburgh.info/bbpress/topic.php?id=3403&page=2#post-35824 Tue, 19 Jul 2011 16:03:27 +0000 Min 35824@http://citycyclingedinburgh.info/bbpress/ <p>It doesn't seem to divulge that information. I put in the info for my Surly (although if I had a rear disk brake for it I'd definately get killed) and it seemed to think I needed a new wheel and hub* too so possibly it's not all that straightforward.</p> <p>* Maybe this is obvious but I don't really know anything about disk brakes. </p> http://citycyclingedinburgh.info/bbpress/topic.php?id=3403&page=2#post-35816 Tue, 19 Jul 2011 14:43:22 +0000 Smudge 35816@http://citycyclingedinburgh.info/bbpress/ <p>"Teh internets can find anything!" which is why you should always take care about what you search for (shudders) ;-)</p> <p>Anyway, back to the important stuff ;-)what does the conversion thingy weigh? </p> http://citycyclingedinburgh.info/bbpress/topic.php?id=3403&page=2#post-35813 Tue, 19 Jul 2011 14:07:43 +0000 Wilmington's Cow 35813@http://citycyclingedinburgh.info/bbpress/ <p>Yeah, it was on the back of that conversation that I finally remembered to have a look. Teh internets can find <em>anything</em>! </p> http://citycyclingedinburgh.info/bbpress/topic.php?id=3403&page=2#post-35811 Tue, 19 Jul 2011 13:57:44 +0000 Min 35811@http://citycyclingedinburgh.info/bbpress/ <p>Ah yes, we were wondering whether you could get some sort of conversion arrangement for disk brakes at PY. That'll be a yes then! It ought to be possible really. </p> http://citycyclingedinburgh.info/bbpress/topic.php?id=3403&page=2#post-35808 Tue, 19 Jul 2011 12:07:39 +0000 Smudge 35808@http://citycyclingedinburgh.info/bbpress/ <p>Thanks Arrelcat, Sounds pretty sensible/solid, also sounds like a lot of messing around just to achieve an increase in power on the back brake... can't the existing brake lock the back wheel? Or is it for purely aesthetic/style reasons? ;-) </p> http://citycyclingedinburgh.info/bbpress/topic.php?id=3403&page=2#post-35807 Tue, 19 Jul 2011 11:40:35 +0000 Arellcat 35807@http://citycyclingedinburgh.info/bbpress/ <p>Smudge, the caliper sits on a bracket mounted on the axle and inboard of the left-hand dropout. A rigid strut connects the forward end of the bracket to the left-hand brake pivot boss on the seatstay, and restrains the rotation of the caliper under braking. They've fitted each end of the strut with a rose joint to provide for alignment in fitting.</p> <p>It'll all be fine as long as the seatstays are sufficiently rigid and the boss is strong - a safer but less generic design would clamp around the tube instead. The seatstays on my old Stumpjumper barely cope with V-brakes, let alone the reaction force from a disc caliper! </p> http://citycyclingedinburgh.info/bbpress/topic.php?id=3403&page=2#post-35806 Tue, 19 Jul 2011 11:40:25 +0000 DaveC 35806@http://citycyclingedinburgh.info/bbpress/ <p>I like, thanks for the info in the link. </p> http://citycyclingedinburgh.info/bbpress/topic.php?id=3403&page=2#post-35804 Tue, 19 Jul 2011 11:17:05 +0000 Smudge 35804@http://citycyclingedinburgh.info/bbpress/ <p>:-( not visible at work, will try to have a look later :-) </p> http://citycyclingedinburgh.info/bbpress/topic.php?id=3403&page=2#post-35801 Tue, 19 Jul 2011 10:38:32 +0000 Wilmington's Cow 35801@http://citycyclingedinburgh.info/bbpress/ <p><a href="http://2btherapy.com/bikes/brake-therapy-conversion-kit">Tis available here</a></p> <p>(easier than me trying to explain... ;) ) </p> http://citycyclingedinburgh.info/bbpress/topic.php?id=3403&page=2#post-35800 Tue, 19 Jul 2011 10:16:03 +0000 Smudge 35800@http://citycyclingedinburgh.info/bbpress/ <p>Not seen a rear disc brake frame adaptor, is there a way it spreads the load across the rear stays or put all the twisting forces through one? How chunky are the rear stays..? </p> http://citycyclingedinburgh.info/bbpress/topic.php?id=3403&page=2#post-35796 Tue, 19 Jul 2011 10:07:38 +0000 Wilmington's Cow 35796@http://citycyclingedinburgh.info/bbpress/ <p>Being back on the Kaff commuting this week I've decided that before the weather gets manky(er?) I'll be forking out (if you'll pardon the pun) 40 quid on a Kaffenback <em>disc</em> fork and sticking a disc brake on the front.</p> <p>Not sure about the rear. I've seen a rather natty looking adapter for non-disc frames, but it's reasonably expensive. More than the brake itself... </p> http://citycyclingedinburgh.info/bbpress/topic.php?id=3403&page=2#post-35559 Wed, 13 Jul 2011 12:00:03 +0000 Dave 35559@http://citycyclingedinburgh.info/bbpress/ <p>Unfortunately not, as I'm driving in and getting away early for the weekend :(</p> <p>Bah! </p> http://citycyclingedinburgh.info/bbpress/topic.php?id=3403&page=2#post-35545 Wed, 13 Jul 2011 10:33:49 +0000 Smudge 35545@http://citycyclingedinburgh.info/bbpress/ <p>Sounds an interesting setup! Any pics? Or will you be at PY on Friday? :) </p> http://citycyclingedinburgh.info/bbpress/topic.php?id=3403&page=2#post-35544 Wed, 13 Jul 2011 10:30:00 +0000 Dave 35544@http://citycyclingedinburgh.info/bbpress/ <p>@smudge - because my brake levers are in the middle of my outlandish handlebars, I can actually activate either (or both) brakes with either (or both) thumbs...</p> <p>Originally I swapped because I had only a front brake on the fixed wheel and had to tackle a right turn on a busy roundabout with a downhill approach. Then I felt I had to shift all my brakes around otherwise I might get caught out, then I just got used to it! </p> http://citycyclingedinburgh.info/bbpress/topic.php?id=3403&page=2#post-35538 Wed, 13 Jul 2011 09:14:57 +0000 wee folding bike 35538@http://citycyclingedinburgh.info/bbpress/ <p>Some cyclists ride with front brakes on both sides. </p>