Chainring bolt behind crank arm

seanorawe
seanorawe Posts: 950
edited March 2016 in Workshop
Is there an easy way to get the chainring bolt off my Sram rival chainring of its under the crank arm?
Cube Attain SL Disc
Giant CRS 2.0

Comments

  • step83
    step83 Posts: 4,170
    Its a funny two stage bolt on these. Are you trying to remove the crank arm? Is so you want an 8mm key into the centre an it will bring the outer tensioning bolt with it.
    Titanium Px Spitfire
    Easty commuter
    Tripster AT
  • seanorawe
    seanorawe Posts: 950
    No I want to remove the chainring bolts to grease them. I know you need a 6mm hex and a 5mm hex for the bolts, however one of the bolts is hidden under the crank arm. Is there a way to get to it, or is it accessed form the other side of the ring (non crank arm side) or is there some sort of special way to take it off?
    Cube Attain SL Disc
    Giant CRS 2.0
  • keef66
    keef66 Posts: 13,123
    seanorawe wrote:
    No I want to remove the chainring bolts to grease them. I know you need a 6mm hex and a 5mm hex for the bolts, however one of the bolts is hidden under the crank arm. Is there a way to get to it, or is it accessed form the other side of the ring (non crank arm side) or is there some sort of special way to take it off?

    From your description I'd have thought it is a bolt threaded into a blind hole rather than a two part affair like the rest. And if so, simply accessed from the back?
  • seanorawe
    seanorawe Posts: 950
    keef66 wrote:
    seanorawe wrote:
    No I want to remove the chainring bolts to grease them. I know you need a 6mm hex and a 5mm hex for the bolts, however one of the bolts is hidden under the crank arm. Is there a way to get to it, or is it accessed form the other side of the ring (non crank arm side) or is there some sort of special way to take it off?

    From your description I'd have thought it is a bolt threaded into a blind hole rather than a two part affair like the rest. And if so, simply accessed from the back?

    From looking at the bolts from the crank arm side, the hidden bolt looks the same as the others. Ill take the whole lot off tonight and see what I can do, or if it can be accessed from the back.
    Cube Attain SL Disc
    Giant CRS 2.0
  • keezx
    keezx Posts: 1,322
    Don't really see the problem, a chainring bolt behind the crankarm must be unscrewed from behind the crankarm, there is no other way....
  • seanorawe
    seanorawe Posts: 950
    I emailed Sram and they were seriously quick getting back to me. THe hidden bolt is accessed form the rear face of the chainring
    Cube Attain SL Disc
    Giant CRS 2.0

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