Gd'day fellow forumites,
For the first time on Friday night i mounted my new bike onto my turbo trainer (elite crono) and did my usual training routine...however, this time while training i could hear over the pumping stereo a creaking sound coming from my new frame...anyway, i just wanted to hear if others are hearing similar sounds while using turbo trainers, as i'm worried that the aluminium frame is flexing and therefore get weaker due to metal fatigue
Other points worth mentioning are...
my old frame never creaked
my new frame even creaks while i'm place my hand on the seatpost tube and move it with modest force from side to side
the creaking sound is hard to pin point but seems to come from the rear brake - seatpost area
modest pedaling force with a 85-95 cadence
Creaking frame sounds during turbo trainer routines
- Fleshpiston
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Creaking frame sounds during turbo trainer routines
Postby Fleshpiston » Sat Sep 20, 2008 11:58 pm
"I ride not because it's easy, but because it's hard. I love to ride, i live to ride" - ramblings from my alter ego 3.3.2010
"BMC frames get better over time just like women and wine" more ramblings 14.3.2010
"BMC frames get better over time just like women and wine" more ramblings 14.3.2010
- toolonglegs
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- Fleshpiston
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Postby Fleshpiston » Sun Sep 21, 2008 11:09 am
Morning,
No...actually...i had to sit on the saddle so the seatpost would slide into the tube The whole event made me check to see if i had splilt the seat tube with a wrong sized seatpost The only lube used was that liquid torque stuff by Ritchey...i applied a thin film around the seatpost...the length of the seatpost is 35cm and about 20cm was inserted into the seat tube...it should be welded in by now...as i also applied 6 Nm of force with my torque wrench when the seatpost clamp was tightened.
This morning i noticed that the creaking sound is always audible when i place my hand on top of the saddle and gentle apply slide ways motion...the sound is certainly not coming from the crankcase area
No...actually...i had to sit on the saddle so the seatpost would slide into the tube The whole event made me check to see if i had splilt the seat tube with a wrong sized seatpost The only lube used was that liquid torque stuff by Ritchey...i applied a thin film around the seatpost...the length of the seatpost is 35cm and about 20cm was inserted into the seat tube...it should be welded in by now...as i also applied 6 Nm of force with my torque wrench when the seatpost clamp was tightened.
This morning i noticed that the creaking sound is always audible when i place my hand on top of the saddle and gentle apply slide ways motion...the sound is certainly not coming from the crankcase area
Last edited by Fleshpiston on Sun Sep 21, 2008 11:33 am, edited 1 time in total.
"I ride not because it's easy, but because it's hard. I love to ride, i live to ride" - ramblings from my alter ego 3.3.2010
"BMC frames get better over time just like women and wine" more ramblings 14.3.2010
"BMC frames get better over time just like women and wine" more ramblings 14.3.2010
- Lark2004
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- Fleshpiston
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Postby Fleshpiston » Sun Sep 21, 2008 1:05 pm
i'm confident that the seat tube doesn't have any cracks as i used the correct sized seatpost...however...its a good idea that i'll use later on if the sound is still occurringBnej wrote:You might also want to pull the post out and inspect both the post and the inside of the seat tube with a light.
yep...the sound is still there if i shake the seat tube, seatpost or saddle...i tried moving only the saddle and its quiet as a mouse.
i've just remounted the bike on the turbo trainer and the creaking sound seems to have gone away...hmmm...i'm starting to think that maybe the compression forces that clamp the chainstays to the turbo trainer were inadequate.
i'll now do a routine on the trainer and see what happens...after that i'll go for a ride on the road...i'll let you guys know what the outcome is
Cheers,
Brad
"I ride not because it's easy, but because it's hard. I love to ride, i live to ride" - ramblings from my alter ego 3.3.2010
"BMC frames get better over time just like women and wine" more ramblings 14.3.2010
"BMC frames get better over time just like women and wine" more ramblings 14.3.2010
- Fleshpiston
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- Joined: Sat Jul 05, 2008 4:35 pm
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Postby Fleshpiston » Sun Sep 21, 2008 3:29 pm
all is well...no more creaking sounds while using the turbo trainer...and no strange sounds being generated while riding on the road the prob must have been too little compression forces from the turbo trainers clamp
now this is slightly off topic...but my new steed is 2.5kg lighter and has a 10cm shorter seat tube than my old ride...now the ride on the road is amazing as its light and very reponsive...however...on the turbo trainer it moves around so much that i'm concerned about flexing the frame too much and therefore accelerating metal fatigue.
does anyone know if turbo trainers can wear out a frame faster than road use due to the forces being generated in a stationary manner
now this is slightly off topic...but my new steed is 2.5kg lighter and has a 10cm shorter seat tube than my old ride...now the ride on the road is amazing as its light and very reponsive...however...on the turbo trainer it moves around so much that i'm concerned about flexing the frame too much and therefore accelerating metal fatigue.
does anyone know if turbo trainers can wear out a frame faster than road use due to the forces being generated in a stationary manner
"I ride not because it's easy, but because it's hard. I love to ride, i live to ride" - ramblings from my alter ego 3.3.2010
"BMC frames get better over time just like women and wine" more ramblings 14.3.2010
"BMC frames get better over time just like women and wine" more ramblings 14.3.2010
- toolonglegs
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- Joined: Fri Jun 29, 2007 7:49 pm
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Postby toolonglegs » Sun Sep 21, 2008 3:38 pm
Yes.... .I cracked the droppouts on my old training bike and I think it was cause by the trainer.Had to throw away the frame.But I used to do some pretty hard out of saddle efforts on it.Fleshpiston wrote:ccelerating metal fatigue.
does anyone know if turbo trainers can wear out a frame faster than road use due to the forces being generated in a stationary manner
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Postby moosterbounce » Sun Sep 21, 2008 4:58 pm
TLL will break anything though so don't listen to him
I use my carbon bike on my trainer (Tacx Fortius) and was advised that this was fine to do provided I didn't do any standing work. No biggie for me The issue when standing is that the "twist" you generate puts the frame under load it wasn't designed for. I notice some movement of my frame when in the trainer, but I must admit, I don't tend to stare at my BB when I'm on the road.
I use my carbon bike on my trainer (Tacx Fortius) and was advised that this was fine to do provided I didn't do any standing work. No biggie for me The issue when standing is that the "twist" you generate puts the frame under load it wasn't designed for. I notice some movement of my frame when in the trainer, but I must admit, I don't tend to stare at my BB when I'm on the road.
- Fleshpiston
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- Joined: Sat Jul 05, 2008 4:35 pm
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Postby Fleshpiston » Sun Sep 21, 2008 6:46 pm
i didn't notice any frame movement before on my old bike while using the turbo trainer...as the frame was more suited for a much larger rider.
my new bike is a totally different story...as its the smallest sized frame which can accommodate my body size...hence...the reason behind the noticeable rocking forces from side to side while doing my usual routine
hmmm...i think i'll keep this one for the road and get a cheaper one for the trainer.
my new bike is a totally different story...as its the smallest sized frame which can accommodate my body size...hence...the reason behind the noticeable rocking forces from side to side while doing my usual routine
hmmm...i think i'll keep this one for the road and get a cheaper one for the trainer.
"I ride not because it's easy, but because it's hard. I love to ride, i live to ride" - ramblings from my alter ego 3.3.2010
"BMC frames get better over time just like women and wine" more ramblings 14.3.2010
"BMC frames get better over time just like women and wine" more ramblings 14.3.2010
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