Forum home› Commuter cycling forum› The workshop

Hybrid forks rattling

kernowriderkernowrider Posts: 7
in The workshop
Hi
I've just switched a stem riser from a Btwin to an Orbea. It fits fine but the forks on the Orbea are now rattling slightly at the crown.

Any ideas ?

And the Orbea doesn't feel as quick. It's lighter, which is great for the hills, but seems more effort than the Btwin

Posts

  • mully79mully79 Posts: 692
    The top cap on the stem tensions the bearings in the headset.
    You need to tension the bearings correctly before tightening the stem clamp bolts .
  • MattFalleMattFalle Posts: 9,759
    whats the gearing on the Orbea compared to the BTwin?
  • kernowriderkernowrider Posts: 7
    mully79 said:

    The top cap on the stem tensions the bearings in the headset.
    You need to tension the bearings correctly before tightening the stem clamp bolts .

    So top stem bolt ( long vertical one ) first before the horizontal clamp ones ?



  • kernowriderkernowrider Posts: 7
    MattFalle said:

    whats the gearing on the Orbea compared to the BTwin?

    It's an 18 speed, whereas the the Btwin was 24, but the drivetrain just doesn't feel as smooth. Like there's that lovely feeing in the right gear on the right incline and yet this just feels / sounds different
  • MattFalleMattFalle Posts: 9,759
    kernowrider said:

    mully79 said:

    The top cap on the stem tensions the bearings in the headset.
    You need to tension the bearings correctly before tightening the stem clamp bolts .

    So top stem bolt ( long vertical one ) first before the horizontal clamp ones ?



    yes

    put stem on but don't do up bolts

    tighten vertical bolt - go to finger tight plus half a turn

    apply front brake to make sure no forward/backward movement. if movement do 1/2 turn more until no movement.

    make sure bars flick left to right with no issues

    i then do a 1/4 turn extra for paranoia reasons but make sure all still flicks with no problem

    then do stem bolts.
  • MattFalleMattFalle Posts: 9,759
    kernowrider said:

    MattFalle said:

    whats the gearing on the Orbea compared to the BTwin?

    It's an 18 speed, whereas the the Btwin was 24, but the drivetrain just doesn't feel as smooth. Like there's that lovely feeing in the right gear on the right incline and yet this just feels / sounds different
    could be you just have to get used to different gearing....

    is it all clean? bike looks gopping in that other piccie you have posted?
  • MattFalleMattFalle Posts: 9,759
    kernowrider said:

    mully79 said:

    The top cap on the stem tensions the bearings in the headset.
    You need to tension the bearings correctly before tightening the stem clamp bolts .

    So top stem bolt ( long vertical one ) first before the horizontal clamp ones ?



    is that conical spacer flush in? looks like a gap in that piccie

    is it the proper spacer than came with tbe headset?
  • kernowriderkernowrider Posts: 7
    MattFalle said:

    kernowrider said:

    mully79 said:

    The top cap on the stem tensions the bearings in the headset.
    You need to tension the bearings correctly before tightening the stem clamp bolts .

    So top stem bolt ( long vertical one ) first before the horizontal clamp ones ?



    yes

    put stem on but don't do up bolts

    tighten vertical bolt - go to finger tight plus half a turn

    apply front brake to make sure no forward/backward movement. if movement do 1/2 turn more until no movement.

    make sure bars flick left to right with no issues

    i then do a 1/4 turn extra for paranoia reasons but make sure all still flicks with no problem

    then do stem bolts.
    Thanks. I'll try that process - I went through it again and it was tighter but still not right.
  • kernowriderkernowrider Posts: 7
    MattFalle said:

    kernowrider said:

    MattFalle said:

    whats the gearing on the Orbea compared to the BTwin?

    It's an 18 speed, whereas the the Btwin was 24, but the drivetrain just doesn't feel as smooth. Like there's that lovely feeing in the right gear on the right incline and yet this just feels / sounds different
    could be you just have to get used to different gearing....

    is it all clean? bike looks gopping in that other piccie you have posted?
    Hahaha. Yes, that was after I'd been out to test how it felt with the riser - it was a new drive train and normally clean as...
  • kernowriderkernowrider Posts: 7
    MattFalle said:

    kernowrider said:

    mully79 said:

    The top cap on the stem tensions the bearings in the headset.
    You need to tension the bearings correctly before tightening the stem clamp bolts .

    So top stem bolt ( long vertical one ) first before the horizontal clamp ones ?



    is that conical spacer flush in? looks like a gap in that piccie

    is it the proper spacer than came with tbe headset?
    There's a gap in the pic as I took it during the check - it was just to illustrate what was there without the riser.

    I presumed it was the spacer which came with the bike; fiddly black plastic ring underneath it.
  • kernowriderkernowrider Posts: 7
    This is the bike as standard, with the cone spacer but not the discs

Sign In or Register to comment.