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  1. #1
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    Drilling Large Marge Rims

    Can anybody reccommend or advise against this.
    How many holes and what size holes would you drill.
    Would the rims still be strong enough for trail centres and rocky decents etc.
    How much would it improve the bikes rolling or climbing ability.
    Is there anything that I need to consider?

    Cheers

  2. #2
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    LM's seem a little trickier since they are double wall rims. Do you have the standard or XC version? The XC's have the inner wall semi-drilled already. The Handspun/Pugs complete rims are standard/non-drilled.

  3. #3
    Living the thug life.
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    Use the search function here and on Google, several threads already. Can be done, still strong.
    I proudly ride for these guys.

    My blog.

  4. #4
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    I plan on drilling out my LM rim in the next few days.

    I've done three GFS rims so far without any problems so may as well do the same with the Marge.

    As for strength. If the GFS can take it the LM definitley can.

  5. #5
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    Anyone got a diagram that shows where the re enforcing ribs are between the outer and inner rims are?( On the none offset version.)

    I want to avoid drilling through them if at all possible.

  6. #6
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    http://www.jaypsdirt.com/blog/68-making-the-upgrade

    that's about the only documentation I've been able to find on drilling large marges. there have been a few threads talking about it, but not much for photos or detailed instruction.

  7. #7
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    Well seen as I couldn't get any info on the internal ribbing on the rim I thought i'd better just go ahead and drill it anyway just to see what happened.

    Went with 30mm holes through the middle of the rim. Turns out that cut through the ribbing but it didn't seem to make drilling them any harder. Apart from it took forever to keep clearing the waste out the middle of the holesaw.
    Took a lot longer to clean the holes up and get rid of all the burrs too.

    Anyway it all turned out well and looks quite cool being able to see how the rim's built.


    2011_0212holeymarge0004 by singlespeedstu, on Flickr

  8. #8
    R.I.P. Pugsley.
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    So you lost a good amount of weight on the rims.
    But now there is room inside the rims to replace all that weight for a load of mud that will stick in there.
    It does look very good !

  9. #9
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    i can see the point but they will just fill with dirt and be difficult to clean for me

    ive got the xc versions so they are a bit lighter anyway

  10. #10
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    After todays ride the bikes were fully caked in shite but there was hardly even a spot of mud on the rimstrip.

    The XC's would be even lighter with a bit of work on them.

    When I've got a bit more time i'm going to cut out most of if not all of the inner rim.

  11. #11
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    Quote Originally Posted by singlespeedstu
    After todays ride the bikes were fully caked in shite but there was hardly even a spot of mud on the rimstrip...
    Nothing a bit of duct tape wouldn't fix
    As little bike as possible, as silent as possible.
    Latitude: 5736' Highlands, Scotland

  12. #12
    ride more
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    That looks awesome, but I would be afraid of packing the rim full of crap between the walls ?

  13. #13
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    Just saved 420gm on these bad boys with 44mm holes. Am tempted to drill the other rim slightly differently and get 22mm-ish holes in there too...would only save another 105gm though.

    Has anyone had problems with drilled rims? I.e. has anyone reached the limit of how much to drill?

    EDIT stu - what's the blue rime tape? Looks nice. Chris King?


  14. #14
    How much does it weigh?
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    Did you re-drill spoke holes in the edge of the rim?

    I have 42mm holes in my GFS and wouldn't dare go bigger.

    Been commuting to work for 3 weeks and ride the occasional XC trails on mine, without issue.

  15. #15
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    EDIT stu - what's the blue rime tape? Looks nice
    It's just some blue ribon from a local dress making shop.

  16. #16
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    I hear they know you well

  17. #17
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    That's right.

    I wouldn't be seen dead in an ordinary run of the mill off the shelf dress.

    Only custom built top end will do for me.

  18. #18
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    SSS

    Do you think that your drilled LM's will still be strong enough for everyday riding, trail centres etc. How much weight do you think that you've saved and do you notice any difference on a ride, are there any change in the wheels characteristics or the way they roll?

  19. #19
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    What do you think of this approach compared to the hole saw. There'll be no need for dressmakers ribbon or any tape, no worries about muck. Pros ? cons ?

    Large Marge surgery

    --------------------------------------------------------------------------------
    I'm going to be building up a Fatbike and was inspired by DirtDad's conversion of his Large Marge rims into single wall rims. Last night I did the same, starting with one offset rim and one non-offset rim. I used my table saw and made multiple cuts circumferentially with a carbide blade. I still need to do a bunch of sanding to clean it all up. This cuts about 1/2 pound per rim.
    Attached Images

  20. #20
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    LM surgery by Moose.2008, on Flickr

  21. #21
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    Quote Originally Posted by moose2008
    SSS

    Do you think that your drilled LM's will still be strong enough for everyday riding, trail centres etc. How much weight do you think that you've saved and do you notice any difference on a ride, are there any change in the wheels characteristics or the way they roll?
    As I was alluding to above, I think the only folk that can give proper comment on how far drilling can go is those who have pushed and found the boundaries...having drilled a rim out and then looking at it, sucking in air through teeth and saying "Ooooh I wouldn't want it to go any lighter than that" doesn't really mean anything. If someone can say "I drilled the rim out this much and then the wheel broke" then that's something.

  22. #22
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    "Ooooh I wouldn't want it to go any lighter than that" doesn't really mean anything.
    You're right al.

    Just keep on drilling until it fails on you on a steep rocky trail.

    There is no right and wrong on this. Just what you feel safe with.
    Having seen how much tension my front lost after drilling I wouldn't feel safe going any bigger for my kind of riding.

    Be great to see just how far someone else can go though.

  23. #23
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    What is your kind of riding?
    What do you think of the approach used above strength wise compared to the one that you used?

  24. #24
    How much does it weigh?
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    If you look at the rim with the tire and rim strip off.. you can see the wall being pulled by the spoke.

    I guess I could drill more smaller holes around the bigger hole, but it's not worth the weight savings for me. I believe if I drilled more holes I will have a hard time keeping the wheel straight.

    I'm already risking early fatigue failure by having the holes so close to the spokes.

  25. #25
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    moose.

    Best thing you can do is experiment for yourself.

    It'd be a bit pointless trying to describe my riding as I ride all over the UK.

    But I think it's a safe bet you'd be OK if your only riding trail centeres.

    No idea about cutting the middle out the rim. I'll try it out for myself when I get time.

    Why don't you try it and tell everyone about it?

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