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  1. #1
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    122mm spindle with Hollowgram SiSl2 cranks and XX1 chainring on F29

    For those that may be interested, I was able to install a 122mm spindle with my Hollowgram SiSl2 cranks and XX1 32 tooth ring on my F29. It took some minors modifications but it all worked out.

    In the picture below you can see I used a Leonardi Racing XX1 spider. The Cannondale spider will not work since it is curved bringing the chaining too close to the frame. The Leonardi spider is flat. If interested, the Leo spiders can be found at Dr. Cannondale.
    122mm spindle with Hollowgram SiSl2 cranks and XX1 chainring on F29-img_6152.jpg

    Here you can see just how close the chainring is to the chainstay. There is only about 2-3 mm clearance. To get this clearance I needed to have the "lip" machined off the nondrve side of the spindle. This allowed me to move the spindle further out on the drive side since the lip was out of the way. This also allowed me to center the cranks properly. Otherwise, the crank on the drive side was closer to the chainstay than the nondrive side. Anyway, I wasn't comfortable machining the lip myself so I took it to a local machine shop and they did an amazing job for just $17.50
    122mm spindle with Hollowgram SiSl2 cranks and XX1 chainring on F29-img_6153.jpg

    In these next two pictures you can see the clearance of the crank arms with the chainstay. There is plenty of clearance (3-4mm) and the arms are centered (same spacing on each side). There is also plently of clearance for my Stages Powermeter. Notice that the arms are tapered for the SiSl2. The other Hollowgrams are not tapered and would probably not clear the chainstay.
    122mm spindle with Hollowgram SiSl2 cranks and XX1 chainring on F29-img_6156.jpg

    122mm spindle with Hollowgram SiSl2 cranks and XX1 chainring on F29-img_6155.jpg

    In this picture you can see where I added some carbon spacers to the nondrive side. This is needed since the lip was machined off. I couldn't find 30mm Inside Diameter spacers so I got some 1 1/8" and dremeled off some of the interior to widen to 30mm. Altogether I needed 13mm.
    122mm spindle with Hollowgram SiSl2 cranks and XX1 chainring on F29-img_6154.jpg

    On the drive side, it is hard to see, but I needed 4mm of spacers plus the wavy washer. I found some Wheels Manufacturing 1mm BB30 spacers and used 4 of them.
    Click image for larger version. 

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  2. #2
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    Here are some pictures of the 122mm spindle with the lip machined off:

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  3. #3
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    122mm spindle with Hollowgram SiSl2 cranks and XX1 chainring on F29

    How'd you get a sisl2 stages? I thought they only made si's.

  4. #4
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    A few months ago they were selling Si, SiSl, and SiSl2. I noticed that all are still listed on their webpage but only the Si are available through their online store. Maybe they're just out of stock for the SiSl and SiSl2, but I don't know. I do know I love my Stages Power Meter!

  5. #5
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    I've done a similar thing, but ended up going back to a wider axle, as the 32T wasnt quite big enough. As soon as you move to a 34T, it rubs.

  6. #6
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    I am on the similar situation but in my case I have the SRM 104bcd spider with wolf tooth 34T .
    I just received the 132mm spindle and Sisl2 crank so just wondering machining off the lips is still necessary of for the longer spindle ?

  7. #7
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    No, you shouldn't need to machine the lip off the 132mm spindle. I needed to do it with the 122mm since I needed every mm possible for clearance with the chainstays and to center the spindle.

    You love the Si Sl2! They are very light and extremely stiff!!!

  8. #8
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    This is what i have now . I did the installation an hour ago and fund out that 132mm to be a tad too long for my frame ( Flash Carbon 68mm ) needed extra spacers both side . Because of the lip and SRM position, left and right aren't sitting on same space between chain stay .
    Below are pictures before installation . Will post more .



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  9. #9
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    Oh, I see, so the crank is not centered. Is the side of the spindle with the lip (nondrive side with the 132mm) too close or too far from the chainstay? If it is too far then machining off the lip will allow the spindle to move in further to center between the chainstays. If the nondrive side is too close, then you have options. You could use some spacers between the lip and the bearing shield to center between the chainstays, or you could still machine off the lip and still center. No matter which route you go, you will probably need some custom spacers. I got some 1 1/8" carbon headset spacers and used a Dremel to widen the inside diameter to 30mm. I actually got these:

    Omni Racer Worlds Lightest Lite Carbon Headset Spacer Set 1 1 8" 2 3 5 10 15mm | eBay

    since the complete interior did not needed milled but just the flanges. To get the correct length I just sanded them down.

    Anyway, hope this helps! Let me know how it turns out.

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