How to Adjust Spacing on a Bike Frame
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How to Adjust Spacing on a Bike Frame

August 26, 2019


Hello and Welcome to this How To Video this is the process that I have already seen on line through the RJ the Bike Guy extremely good channel and yes well worth a watch so this is a process that I have seen and something that I need to do I have got a couple of wheels here basically this is my track bike my hack this set is a 120mm and this one just over 130mm which is a standard 8, 9, 10 speed rear hub and I want this to go on to this bicycle frame no way that it will go on at the minute the process that I have seen is a cold set a steel process all that we are going to be doing is expanding increasing the distance at the back It will act like a bit of a spring so will come back to a distance so I am going to share with you exactly how far I am going to have to take this out I would say do not try this on aluminium frame its got a good chance of creasing the titanium is regid very solid and the carbon is a big no no so do not try this on carbon it is a cheap frame, it is my personal hack it is my personal frame it is a project that I am working on at the minute so do this at your own risk do not hold me accountable for any mistakes in that respect but I am going to share it with you and show you exactly where we are at as I say we are going to have to take this further out than what is actually needed to achieve the distance that we need so the tools that we are going to be using just got a standard steel threaded rod here with a few nuts on there and some washers what we are going to be doing is putting this between the forks and forcing the forks out I have got a ruler also got a tape measure and I have got a spanner so they are all the tools that are needed very cheap process this I am also going to be showing you a process that I have seen as well for checking the alignment of the bike frame so hang around for that and lets get a move on OK so as you can see there is the rear wheel at the minute that is the 120mm wheel that is in there fits in lovely OK and this is the other hub as you can see it is a lot further out so that at the minute is bang on 120 exactly 120 so lets get this in also what I am going to do is clamp on to this rod here just to stop it from turning around basically so as I am increasing the width here I am just going to clamp this on to stop the rod from turning around so that is in there nicely ok so just goiung to start just slowly increasing this rod here can see that slowly increasing in size so we want to take this out to 130mm so I am going to start be taking this out to 145mm I think that it is going to take more from what I have read it takes slighty more than that OK 145 so lets take that off then I think that that has worked slightly I do not think that that has got the distance that we need so lets check the distance out as I say we are doing this in slow increments lets put that down there for a minute so what have we got there now we have got it has took that out about about 3mm so yes we are going to have to go out quiet a bit more than 145 but as I say if we do this in slow increments we have got less chance of over stretching it Ok lets get this back out again OK so that is 160 now Ok so lets take the pressure off these now and remeasure it is about 2mm short of what we need so what was that that was 160mm so we are going to go out to 165mm I think lets go up to 165mm and that should take it out but yes looks all good so far so going to try this up now WOW! Ok so that is amazing it now fits like a glove so we took it out to 165mm to achieve the distance that we needed so we went from 120 to 165 to achieve 10mm of distance that fits like a glove very happy with that ok as I say just do small increments at a time what we are going to do now is show you a process to check the alignment of the rear forks Checking the alignment of the frame very simple process to do there are expensive tools on the market so if you are doing this on a regular basis or intend to then I would recommend on investing in a specific tool to do this all that we are using is a bit of fishing line or even a bit of string that is hanging around the house so it is a very cheap process to do and we are going to use the straight end of the ruler that we used before all that we have done is we have tied the line around the front here ran it down here and tied it here behind the rear stays and I have got quite a bit of tension on there now on this fishing line and all we are going to do then is measure the distance between the down tube of the Bicycle frame here and the line so I am going to put this on the bike frame itself OK so I have 29mm on this side and agin 29mm so what a success this has been this frame now is all ready to be sent off and sprayed we are going to have a real fancy job done so very excited about that so if you want to see this in all its glory and this video has been helpful for you then then please click on Subscribe it is completly free of charge other than that then drop us a like Thanks for watching and Bye for now!

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  1. You only need to do the nut on one side. Both sides will get pushed out equally. Newton's 3rd law I believe. And besides the frame alignment, you probably also want to check the alignment of the dropouts.

  2. Good one Andy thanks for the video and tips, curious tho, are you going to make that frame into a multiple gear bike? Or it was just to show the tool use? I have had seen a similar at Mr. Il RJ's but to straighten the stays instead of one single threaded rod you use 2, that's when the stays are bent or just misaligned. Always a pleasure, cheers ๐Ÿป . ๐Ÿ™‚

  3. I've just had to do this on a newly restored PX10 frame, basically because I was being cheap and not sourcing the correct wheels lol… Nerve racking 15 minutes that was lol.

  4. Hey Andy! I really enjoy your content! Your restorations are amazing, and along with these slow pace how to's I must say that you're probably my favorite bike guy on youtube, and I'm very excited to follow your progress
    Thanks for sharing your passion with us.
    /L

  5. Andy……..would love to see a video of the complete bike after all the work you have put into it.
    On a lighter note as an ex pat living in Canada I love it when you call a wrench a "SPANNER".
    Keep the videos coming.
    John from Canada.

  6. Nice detail Andy and very well done, hope to see more of this frame project, thanks for sharing
    Cheers

  7. Yes, just like Scott, I can't wait to see the finished bike. It was quite moving to see that the first two comments were between two good bike pros. We're in the league of champions here. I must admit that I much prefer to see a fixie turned into a a ten speed than the other way around. Nice work as usual Andy. All the best, Ralph.

  8. RJ The Bike Guy's videos have helped me on many, many, occasions on how to work on my fleet of steel frame bikes. Plus other bike how to's for general bike maintenance. He has the best bike channel on youtube.

  9. I currently have an old frame which I am converting to a fixed gear, but the rear spacing is too wide! Is it ok to compress it to fit a single speed cog?

  10. I've seen this done before on RJs' channel. It's a good way to confirm alignment if you find that you're having handling problems with any bike. Although, this method of cold setting should only ever be attempted on steel frames. Years ago when I switched to modern wheels on old bikes I just spread the dropouts slightly while installing the axle until it just squeezed in. That seems to have worked out OK. After riding the bikes for a long while and removing the wheel again, it keeps the same distance between the dropouts without any more squeezing. Straightening the dropouts to keep them square to the axle can be done at that time. Easy does it is the key.โ˜บ

  11. I have a steel bike, but I want to increase the distance between the chain stays (to accommodate wider tires/rims) but keep the hub spacing the same. Any ideas in that regard? I'm guessing it might ruin the frame?

  12. Is there as way to do this on aluminum frame bikes? I've a ligth weight 24 speed mountain bike that I want to install a bafang 1000w mid drive system on. I'm looking into reusing my 3 speed centre ring with the unit (or similar toothed rings rings: "42 / 32 / 22" outer to inner), but because of the way the motor is built, it adds a lot of push out offset to the centre chain line. I'll probably need to offset the rear cassette a similar amount to try to recentre to original settings..

  13. Can you also bend the frame inwards? And will it still work, if you have those little tubes connecting the tubes of the rear triangle?

  14. Given the rear wheel you used in adjusting the spacing, how will you mount the rear derailleur on that frame ?

  15. Nice video! Thanks for sharing. Question: is it possible to "shrink" the frame back to original size (120mm)? Will it compromise the frame's integrity?

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