Author Topic: Why don't my gears work properly?  (Read 1386 times)

Re: Why don't my gears work properly?
« Reply #25 on: July 22, 2020, 02:11:08 pm »
They all do that sir. I have a Boardman Pro Carbon which I bought way back in 2014. It’s always done what you describe there. I’ve never had it actually go into the spokes to the point it wrecked the mech, but it seems to be a bit of a ‘quirk’ with those frames.
That rather suggests the "direct power transfer"* stays are as stiff as wet spaghetti!

*Boardman bikes are absolutely covered in naff logos and acronyms
I’d agree with you on that. I think it’s a mixture of using fairly ( relatively ) low modulus CF, for economic reasons and not using enough to make it stiff, to ensure the weight doesn’t go up too much, and trying to make it comfortable enough for the ‘target market’.
Loving life with a beautiful Bianchi.

Re: Why don't my gears work properly?
« Reply #26 on: July 22, 2020, 08:26:17 pm »
Compared it to an identical TC.  The hanger is clearly not right - the mech was leaning the other way on the other bike.  It's never been dropped or crashed so it must be a factory defect.  A new one is on its way.  Still a massively flexible rear end!
And Darkness and Decay and the Coronavirus held illimitable dominion over all.

LittleWheelsandBig

  • Whimsy Rider
Re: Why don't my gears work properly?
« Reply #27 on: July 22, 2020, 08:50:52 pm »
Do I win a prize?
Wheel meet again, don't know where, don't know when...

zigzag

  • unfuckwithable
Re: Why don't my gears work properly?
« Reply #28 on: July 22, 2020, 08:53:29 pm »
it could have been bent during delivery or had a knock - it doesn't take much to bend a hanger. it takes a lot of force to flex a rear triangle in opposite directions (one side up, another one down), much more than to flex a wheel sideways.

Re: Why don't my gears work properly?
« Reply #29 on: July 22, 2020, 10:13:49 pm »
Hangers are designed to be weak so that they bend or break easily to protect the frame. You may well have not witnessed the knock at a coffee stop. I carry a spare one now.

Torslanda

  • Professional Gobshite
  • Just a tart for retro kit . . .
    • John's Bikes
Re: Why don't my gears work properly?
« Reply #30 on: July 22, 2020, 11:17:03 pm »
Hangers are designed to be weak <SNIP>

Unless it's a Trek Marlin 5 [SPIT!] which snap as soon as you look at them and hint at getting the alignment tool out...
VELOMANCER

Well that's the more blunt way of putting it but as usual he's dead right.

Re: Why don't my gears work properly?
« Reply #31 on: July 23, 2020, 01:22:34 pm »
The new one turned up but I straightened the old one.  It wasn't out by much but a long steel rule eyeballed against the seat tube showed it was bent in by about a degree (which is about -2mm of mech cage clearance).  Tiny bit of skew as well.
And Darkness and Decay and the Coronavirus held illimitable dominion over all.

Re: Why don't my gears work properly?
« Reply #32 on: July 24, 2020, 08:46:47 pm »
All happy now.  Also fitted a s/h but immaculate Dura-Ace mech with a shorter cage and it's transformed the bike.  Well, it's still a dull ride but it changes gear nicely!
And Darkness and Decay and the Coronavirus held illimitable dominion over all.

Torslanda

  • Professional Gobshite
  • Just a tart for retro kit . . .
    • John's Bikes
Re: Why don't my gears work properly?
« Reply #33 on: July 29, 2020, 10:53:52 pm »
Shiny thing make it all better...
VELOMANCER

Well that's the more blunt way of putting it but as usual he's dead right.