Differance between SLX/Deore BBs?

blablablacksheep
blablablacksheep Posts: 1,377
edited March 2012 in MTB buying advice
About to buy a new BB as my current one it seems is on its way out.

Given that the cranks have side to side play and tightening the black cap isnt removing it, even when over-tightening it which ofc you shouldnt do.

But whats the differance between the Deore BB51 and thier XT/SLX BB70 ??

Its £10 more so wondering if it worth it.
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Comments

  • benpinnick
    benpinnick Posts: 4,148
    Not alot. Slightly better seals as far as I can tell.
    A Flock of Birds
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  • The Rookie
    The Rookie Posts: 27,812
    Slightly lighter as well. (85 v 98g from memory)

    I presume you loosened the lock bolts before tightening the pre-load adjuster? Tightening the preload should remove side to side play even with shot bearings, so sounds like something else if wrong.

    Simon
    Currently riding a Whyte T130C, X0 drivetrain, Magura Trail brakes converted to mixed wheel size (homebuilt wheels) with 140mm Fox 34 Rhythm and RP23 suspension. 12.2Kg.
  • blablablacksheep
    blablablacksheep Posts: 1,377
    Ok so seals could be better that probably worth the tenner then.

    On the side to side play within the cranks i did loosen the two lock bolts(took them completely off too) before tightening the Pre-load ajuster(black nut).

    I think it must be the bearings within the BB as i have had the BB now for 6months+ so seems like that is the cause, though i cannot think of anything else causing side to side play other than pre-load nut being loose.
    London2Brighton Challange 100k!
    http://www.justgiving.com/broxbourne-runners
  • 1mancity2
    1mancity2 Posts: 2,355
    Once the bearings start to go, you can tigthen but you will get play in them almost straight away, also did you push home the locking pin on the plastic tab?

    you can dismantle the bb and repack the bearings with grease but again only a temp fix.
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  • rockmonkeysc
    rockmonkeysc Posts: 14,774
    I find SLX BB's last at least twice as long as Deore. Much better seals.
    Transition Patrol - viewtopic.php?f=10017&t=13070235
  • cooldad
    cooldad Posts: 32,599
    Only bit of bling on my bike is an XTR BB. IMO worth the extra - seals are much better.
    I don't do smileys.

    There is no secret ingredient - Kung Fu Panda

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  • blablablacksheep
    blablablacksheep Posts: 1,377
    also did you push home the locking pin on the plastic tab?

    co.** Monkey, i think i forgot to put that plastic tab back :shock:

    "runs to bike to check".......
    London2Brighton Challange 100k!
    http://www.justgiving.com/broxbourne-runners
  • cooldad
    cooldad Posts: 32,599
    Won't make any difference.
    I don't do smileys.

    There is no secret ingredient - Kung Fu Panda

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  • Sikora
    Sikora Posts: 519
    cooldad wrote:
    Only bit of bling on my bike is an XTR BB. IMO worth the extra - seals are much better.

    I've decided to go for an XTR mech next myself. Only seem to be getting 6 months out of a Deore BB

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