Comments on: How To Replace Cotterless Crank Arms http://bicycletutor.com/replace-cotterless-cranks/ Bike repair videos show how to fix your own bike. Bicycle maintenance and repair instructions by Alex Ramon. Thu, 19 Nov 2009 04:06:35 +0000 http://wordpress.org/?v=2.8.4 hourly 1 By: mike http://bicycletutor.com/replace-cotterless-cranks/#comment-2649 mike Fri, 30 Oct 2009 16:58:44 +0000 http://bicycletutor.com/replace-cotterless-cranks/#comment-2649 I'm having the same problem as jonb, specialized hardrock sport with suntour cranks. Not getting any resistance from the crank puller! Mine is a 2010 hardrock! I’m having the same problem as jonb, specialized hardrock sport with suntour cranks. Not getting any resistance from the crank puller! Mine is a 2010 hardrock!

]]> By: JonB http://bicycletutor.com/replace-cotterless-cranks/#comment-2092 JonB Thu, 26 Feb 2009 11:55:23 +0000 http://bicycletutor.com/replace-cotterless-cranks/#comment-2092 Tutorial was very useful except I have a problem. I followed it to the letter but when I inserted the crank puller it encountered no resistance at all, and when it was fully extended the cranks were still on. I took both bolts off and saw it to be completely hollow all the way through the BB and spindles, so there was nothing for the crank puller to push off. It's not a cheap bike, Specialised Hardrock with Suntour cranks and a cartridge BB of unknown manufacture (I haven't been able to take it out to have a look), nor is it old (8 months old, but it's been trail riding pretty much every weekend since I bought it) Tutorial was very useful except I have a problem. I followed it to the letter but when I inserted the crank puller it encountered no resistance at all, and when it was fully extended the cranks were still on. I took both bolts off and saw it to be completely hollow all the way through the BB and spindles, so there was nothing for the crank puller to push off.

It’s not a cheap bike, Specialised Hardrock with Suntour cranks and a cartridge BB of unknown manufacture (I haven’t been able to take it out to have a look), nor is it old (8 months old, but it’s been trail riding pretty much every weekend since I bought it)

]]> By: Alex http://bicycletutor.com/replace-cotterless-cranks/#comment-1955 Alex Fri, 20 Feb 2009 21:26:35 +0000 http://bicycletutor.com/replace-cotterless-cranks/#comment-1955 Thanks Joe, In the video I am using the <a href="http://bicycletutor.com/go/shimanocrankextractor" rel="nofollow">shimano crank extractor</a>, which does work great for this job! Thanks Joe,

In the video I am using the shimano crank extractor, which does work great for this job!

]]> By: Joe http://bicycletutor.com/replace-cotterless-cranks/#comment-1949 Joe Fri, 20 Feb 2009 18:00:44 +0000 http://bicycletutor.com/replace-cotterless-cranks/#comment-1949 Hi, awesome tutorial! What brand/model crank puller did you use? I used a very similar (if not identical) one at my local bike co-op. They mostly have Park Tool tools. However, when I look at the Park Tool website, i don't see the same crank puller. They have ones that come with a handle. I like the one you used because it saves a lot of space. Thank you, Joe Hi, awesome tutorial!

What brand/model crank puller did you use? I used a very similar (if not identical) one at my local bike co-op. They mostly have Park Tool tools.

However, when I look at the Park Tool website, i don’t see the same crank puller. They have ones that come with a handle. I like the one you used because it saves a lot of space.

Thank you,
Joe

]]> By: Justin http://bicycletutor.com/replace-cotterless-cranks/#comment-1429 Justin Mon, 02 Feb 2009 17:39:56 +0000 http://bicycletutor.com/replace-cotterless-cranks/#comment-1429 Great tutorial Alex. I just replaced the cranks on my Schwinn mountain bike. The cranks were fine, but I had a crash, which stripped the threads which accept the pedal on the right crank. Wasn't too upset since I had just replaced the rear gear cluster, and now have all new gears front and back. One thing I noticed, was that when I replaced the right crank, I had to replace the left as well. The lengths were identical, but the square bracket was cut differently in the old cranks versus the new, so that instead of 6 oclock and 12 oclock, the new right crank and old left crank were at 12 and 8. I just replaced the left side with the replacement that came with my new set, and the angles were correct. Unexpected, but something to be careful of for anyone needing to replace only 1 crank. Thanks again Alex, Justin Great tutorial Alex. I just replaced the cranks on my Schwinn mountain bike. The cranks were fine, but I had a crash, which stripped the threads which accept the pedal on the right crank. Wasn’t too upset since I had just replaced the rear gear cluster, and now have all new gears front and back.

One thing I noticed, was that when I replaced the right crank, I had to replace the left as well. The lengths were identical, but the square bracket was cut differently in the old cranks versus the new, so that instead of 6 oclock and 12 oclock, the new right crank and old left crank were at 12 and 8. I just replaced the left side with the replacement that came with my new set, and the angles were correct. Unexpected, but something to be careful of for anyone needing to replace only 1 crank.

Thanks again Alex,
Justin

]]> By: Alex http://bicycletutor.com/replace-cotterless-cranks/#comment-1100 Alex Sun, 18 Jan 2009 03:53:08 +0000 http://bicycletutor.com/replace-cotterless-cranks/#comment-1100 Stan, I'm guessing the spindle is backwards. Both ends of the spindle are usually different lengths. Try pulling the BB apart and flipping it around. Let me know if that works. Stan, I’m guessing the spindle is backwards. Both ends of the spindle are usually different lengths. Try pulling the BB apart and flipping it around. Let me know if that works.

]]> By: Stan http://bicycletutor.com/replace-cotterless-cranks/#comment-1099 Stan Sun, 18 Jan 2009 03:44:11 +0000 http://bicycletutor.com/replace-cotterless-cranks/#comment-1099 Thanks for the tutorial. I just re-greased my bottom bracket. When reinstalling the crank the drive side is now too close to the frame and the chain-ring rubs against it -- I didn't neglect to re-install any washers or other parts. Any idea what my problem is? Thanks for the tutorial. I just re-greased my bottom bracket. When reinstalling the crank the drive side is now too close to the frame and the chain-ring rubs against it — I didn’t neglect to re-install any washers or other parts. Any idea what my problem is?

]]> By: Alex http://bicycletutor.com/replace-cotterless-cranks/#comment-329 Alex Tue, 12 Aug 2008 03:48:40 +0000 http://bicycletutor.com/replace-cotterless-cranks/#comment-329 Take the crankset to your local shop and get them to match it with a replacement. If they can match it up you shouldn't have to replace the bottom bracket or front derailleur, but you might have to make some minor derailleur adjustments. Take the crankset to your local shop and get them to match it with a replacement. If they can match it up you shouldn’t have to replace the bottom bracket or front derailleur, but you might have to make some minor derailleur adjustments.

]]> By: binzer http://bicycletutor.com/replace-cotterless-cranks/#comment-328 binzer Tue, 12 Aug 2008 03:39:41 +0000 http://bicycletutor.com/replace-cotterless-cranks/#comment-328 Hello Alex, excellent site, great tips and instructions. I have a question relating to cranksets. I want to change mine from a 22/32/42 to a 28/38/48, but since my chain rings are riveted I need to replace the entire crankset. My bottom bracket is 120 mm. How can I maintain the correct chainline? Will I also have to replace my BB? And what about my front derailleur, will I have to change that too? Thanks. Hello Alex, excellent site, great tips and instructions. I have a question relating to cranksets. I want to change mine from a 22/32/42 to a 28/38/48, but since my chain rings are riveted I need to replace the entire crankset. My bottom bracket is 120 mm. How can I maintain the correct chainline? Will I also have to replace my BB? And what about my front derailleur, will I have to change that too? Thanks.

]]> By: Hjalmar http://bicycletutor.com/replace-cotterless-cranks/#comment-327 Hjalmar Fri, 08 Aug 2008 20:03:33 +0000 http://bicycletutor.com/replace-cotterless-cranks/#comment-327 OK. That was the easy part. Now where is the chapter on [old] cottered crank arms? Park Tool no longer sells their CR-2, and I'm still loathe to use a hammer. Also, where can on get replacement cotter pins for crank arms? Thanks. <a href="http://bicycletutor.com/requests/cottered-crank-replacement/" rel="nofollow">Status of this Request</a> OK. That was the easy part.

Now where is the chapter on [old] cottered crank arms? Park Tool no longer sells their CR-2, and I’m still loathe to use a hammer. Also, where can on get replacement cotter pins for crank arms?

Thanks.

Status of this Request

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