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  • to Shim or not to Shim

     dav_dump updated 11 years, 11 months ago 4 Members · 6 Posts
  • dav_dump

    18 July 2008 at 9:45 am


    I currently have a 5yr old good quality Giant rigid MTB (no suspension), and due to slightly dodgy wrists, I feel that I need some sort of impact damping. I have been offered two options; a low end fork (RTS) or a suspension stem. I was originally just planning on using the stem as I do most riding on roads. But it is a 1″ quill stem and my bike has a 1 1/8″ steerer tube and this leads me to my first question,

    1. Can I use like a seatpost shim to fit a 1″ quill stem into a 1 1/8″ threaded tube? If not then the next is irrelevant

    If I can shim it, what would you recommend for my situation? I currently use my bike mainly for road commuting and some dirt tracks, and very occasionally I may want to use it fully off road. I have used this rigid bike for many years off road and its been okay, and I’m not too keen on the power that is wasted into the suspension on hill climbs etc.

    So next question:

    2. Is a stem suspension any good or should I just sacrifice a little efficiency (is this even significant?) on my commute and go for the front suspension?

  • mr-marty-martin

    18 July 2008 at 3:16 pm

    not realy sure what your goin on about but… id go for a front susp.

    how much you looking at. mabey you could get a cheap decent 07 one

  • dav_dump

    18 July 2008 at 3:47 pm

    i already have a suspension stem, an RTS fork and a Suntour fork. So I’m only looking at buying the stuff need to fit it i.e. A shim for the stem or a headset and a stem for the forks, so about £30-40!

    has anyone tried a shim on a quill stem before!?!

  • Gunner

    18 July 2008 at 4:26 pm

    I don’t believe there is any benefit to be gained from stem suspension, I remember the original Flexistems which made an appearance in the early 90’s and used coloured “spacers” to allow adjustment to the degree of suspension required. This was a fiddly process, not all that worthwhile and often the spacers broke on heavier impacts.

    I’d go for sacrificing that little bit of efficiency and use front suspension if it is going to save your wrists from discomfort, I mean your not a racer, or a performance cyclist are you? so what does it really matter…….



    18 July 2008 at 9:35 pm

    Would expect the forks to be a better bet so long as they have lock out then you can use them on the road without making too much diffrence to speed/handling.

    Wouldnt use a shim why dont you just change to a no threads head set and change to a 1 1/8th stem with the forks.

    As an alternative have you looked into either of these to reduce/aid a more conforting ride….



  • dav_dump

    19 July 2008 at 11:08 pm

    hi thanks for the suggestions. I’ve decided to go with the fork.

    Can anyone recomend the best headset and stem for about £10-15 each?

    bearing in mind I won’t be using it for jumping etc!

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