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  1. #1
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    AM with a thompson lay back post

    Morning !

    I've just taken delivery of my lovely new Helius AM (thanks gravity-sport!)

    Having swapped over a fair bit of stuff from my old CC(now for sale...ano silver, '06 medium), I've come to fit my layback type post. I've noticed the forum photo's all seem to show in-line types.

    Is it personal preference, or a clear benefit having the in-line post?

    Cheers

  2. #2
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    Reputation: Karve's Avatar
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    Personal preference bro - on any bike not just an AM

  3. #3
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    Personal preference. You might want to shorten your stem with the am, as well as add rise and/or raise it a few mm's.

  4. #4
    local trails rider
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    Whatever puts your seat where you want it to be.
    Nicolai gives the seat tube angle as 73.2 degrees, with a 545mm fork (A to C). I think I would need some set back; others might manage with a straight post.

  5. #5
    steep fast and loose :)
    Reputation: The_Lecht_Rocks's Avatar
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    i'm with jerky. Thomson X4 50mm stem, lots of spacers underneath (about 15mm to begin with), then dial in height to suit.
    however, i'd tend to size the bike right rather than buy a layback post. the AM benefits from a steeper than normal seat angle for climbing compared to other 160mm AM rides and as such adding a layback post will put too much weight over the rear wheel causing the steering to go wallowy on steep ascents. not recommended !
    i saw your frame in gravity sports handbrake - bright white ! lets see the pics once built up.

  6. #6
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    Reputation: derekr's Avatar
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    I have to agree dont fit a layback post, buy the correct size frame!

    With the AM you dont want too much weight over the back (As you'll get with a layback) as it'll make the front twitchy and effect handling, and the handling is so GOOD you dont want to spoil it! If you put an inline post you should be able to put your seat at the farthest setback position and deal from there, if you cant you should have bought a large!

    Great frame tho and it looks super sweet in white i saw your frame @ GS L O V E L Y ! ! !

    Congrats and cant wait to see some pics!
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  7. #7
    local trails rider
    Reputation: perttime's Avatar
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    I agree that seat position should not be used to compensate for frame sizing.

    I find that I need the seat a certain distance behind the BB. With my dimensions (longish thighs/shortish shins) I need the seat further back than many others.

  8. #8
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    IMG_3195.JPG

    IMG_3196.JPG

    IMG_3197.JPG

    As you're wanting a look....here she is...


    Thanks for your advice..... I'll put it into action when bank balance allows

  9. #9
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    Reputation: derekr's Avatar
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    Looks great bud congrats
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  10. #10
    steep fast and loose :)
    Reputation: The_Lecht_Rocks's Avatar
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    not a white fan, but a set of black atlas cranks would look awesome on that bike. great frame choice - let's hear your ride review

  11. #11
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    Reputation: dipper's Avatar
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    the layback on your post is naff all. About the same as most 'normal' posts. If it feels fine then don't worry about it.

    looking good though. Shame about the mis-matched brakes

  12. #12
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    you can blame derekr for the knackered rear brake as it used to belong to him!

  13. #13
    steep fast and loose :)
    Reputation: The_Lecht_Rocks's Avatar
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    what size is that frame ?

  14. #14
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    Reputation: derekr's Avatar
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    medium
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  15. #15
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    Reputation: derekr's Avatar
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    Quote Originally Posted by dipper
    you can blame derekr for the knackered rear brake as it used to belong to him!
    What happened to my old VERY FAITHFUL WHEN I HAD IT moto V2?

    Agree'd re. the layback that'll make NO difference atall, no more than putting the seat @ the farthest back position
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  16. #16
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    nothing wrong with the moto brake....apart from the bent lever, and some seal or airlock issues .

    Any way, despite the non matching brakes, I took it to Afan on Sunday. Effin' brilliant bike!!!!! I'm not the bravest rider, but it allowed me to ride off/down stuff that really phased me on the old CC(even with pikes fitted). Obviously it's a little more work up the hills, but that could be equally blamed on the rider not getting out enough! Very nimble on the alpine black section and energy trails. I need a bit more time to dial in the air pressures, but so far I'm REALLY pleased.

    Gravity sport have been more than helpful, and quick to deal with the odd niggle which always crop up on this kind of build. I can't rate them highly enough......but you people already know that, don't you!!

    Cheers for your compliments

    Steve

  17. #17
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    hmm weird, wasnt bent when i had it!
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  18. #18
    steep fast and loose :)
    Reputation: The_Lecht_Rocks's Avatar
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    glad you like it handbrake - truly an All Mountain capable machine. climb brilliantly, descend brilliantly, singletracks well, but still no flying machine in the tight stuff....Hummer and Ti456 fill that gap for me
    There's not a lot of dial in required on the AM As the chassis is bob-free and stiff enough not to worry. simply set your sag at 30% front and rear to begin with, set your rebound so you're not propelled out the saddle, and it's good to go - really as easy as that as your 1st reference point.....
    keep us updated

  19. #19
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    Reputation: dipper's Avatar
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    Derek, it wasn't you're Moto's(i've got them) it was the M4's. No big deal though I'll get it sorted

  20. #20
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    Ah ic, but as far as i was aware they were perfect too, just recently new pads etc.... weird.
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  21. #21
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    just spotted teh wee link under your posts I like it.

    need to get one myself!

  22. #22
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    I'll send you the code
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